FAQ: Frequently Asked Questions About HPLC Safety, Solvent Supply and Waste Disposal

An eluent is the solvent or solvent mixture used as the mobile phase in HPLC. It transports the sample through the chromatographic column and has a major influence on the separation of the individual substances.

Typical components of mobile phases include water, acetonitrile, methanol, ethanol, isopropanol, buffer solutions, formic acid and acetic acid.

The hazards and material requirements depend on the complete composition, concentration and specific application.

Solvent vapours are produced when volatile solvents from bottles, lines, canisters or open collection containers pass into the gas phase.

Vapour formation is influenced by factors including vapour pressure, temperature, open surface area, air movement and duration of exposure.

Depending on the substance, solvent vapours can irritate the eyes and respiratory tract, be harmful or toxic, and cause headaches or dizziness.

Many HPLC solvents are also flammable or highly flammable. The specific hazards and protective measures are stated in the relevant safety data sheet.

Controlled closed systems reduce the uncontrolled release of solvent vapours and evaporation losses.

They support occupational safety, orderly line routing and chromatographic conditions that remain as constant as possible.

On the supply side, the eluent is conveyed from a laboratory bottle to the HPLC pump.

On the disposal side, the HPLC waste produced by the analytical instrument is collected in a suitable waste container.

A Safety Cap is used on the eluent bottle and provides a controlled closed HPLC solvent supply.

A Safety Waste Cap is used on the waste container and provides closed HPLC waste disposal.

Safe operation does not depend solely on an individual cap, filter or canister.

What matters is the coordinated interaction of the container, thread, cap, capillaries, fittings, blind plugs, valves, filters, sensor technology and the operating process.

An HPLC Safety Cap is a technically coordinated closure for the eluent bottle of an HPLC system. It seals the bottle opening and the capillary feedthroughs, guides the supply capillaries safely through the closure and integrates controlled pressure equalisation via a vent valve. Together with fittings, blind plugs and inlet filters, it forms a controlled closed solvent supply system. This reduces uncontrolled air and vapour exchange and helps preserve the prepared composition of the mobile phase.

A complete system consists of:

• Eluent bottle
• HPLC Safety Cap with media-contacting core
• Supply capillaries
• Suitable fittings
• Blind plugs
• Vent valve
• Inlet filters
• Clear identification of the eluent paths

Only when these components are technically coordinated can the solvent supply operate as a controlled closed and reproducible system.

The eluent bottle is largely closed to uncontrolled air and vapour exchange.

When the HPLC withdraws eluent, the vent valve allows filtered ambient air to flow in as required. Once the pressure has equalised, the valve closes again.

An HPLC Safety Cap reduces solvent vapours and evaporation losses.

It also protects the eluent from airborne particles and supports orderly, safe and reproducible capillary routing.

Contamination or evaporation-related changes in the mobile phase can affect chromatographic results.

Possible consequences include changes in retention times, unstable baselines, additional peaks and reduced reproducibility. A Safety Cap does not clean the eluent, but it helps preserve its prepared quality and composition as far as possible.

Important selection criteria include:

• Analytical or preparative application
• Isocratic or gradient method
• Number of eluent bottles
• Bottle material and bottle thread
• Number of supply capillaries
• Capillary outside and inside diameters
• Required flow rate
• Eluents and additives used
• PFAS sensitivity of the application
• Possible future extensions

The application determines the Safety Cap configuration – not the other way round.

Further information: HPLC Safety Caps for different bottle threads

Analytical applications often use capillaries with outside diameters of 1.6 mm, 2.3 mm or 3.2 mm.

Preparative applications operate at higher flow rates and may require larger capillaries, for example with outside diameters of 4.0 mm, 4.76 mm or 6.35 mm.

Capillaries, fittings, inlet filters and the vent valve must be suitable for the required flow rate.

An isocratic method uses a single eluent or a constant solvent mixture.

A gradient method uses two or more eluents from separate bottles. The individual eluent paths should be clearly labelled A, B, C or D.

The size depends on the maximum number of supply capillaries required.

Typical variants are:

• Safety Cap I: one port
• Safety Cap II: two ports
• Safety Cap III: three ports
• Safety Cap IV: four ports
• Safety Cap VI: six ports

Unused ports must be closed with suitable blind plugs.

For analytical Safety Caps, SCAT supplies fittings for the common capillary outside diameters of 1.6 mm, 2.3 mm and 3.2 mm for each capillary port.

This allows the appropriate fitting to be selected during installation. The Safety Cap does not have to be specified for a single capillary size when ordering.

An open port creates a direct connection between the eluent bottle and the laboratory environment. This can allow solvent vapours to escape while air, moisture and contaminants can enter the bottle. At the same time, the composition of volatile eluent mixtures may change. The following therefore applies to standard capillary ports: occupied ports are sealed with the appropriate fitting, while unused ports are closed with a blind plug.

The media-contacting core is mounted so that it can rotate freely within the screw cap.

When the cap is screwed on or off, the outer cap body rotates while the core and capillaries remain largely in position. This prevents the capillaries from being unnecessarily twisted, kinked or mechanically stressed.

1-litre laboratory bottles made of borosilicate glass with a GL 45 thread are frequently used.

Depending on the application, other bottle volumes, plastic bottles, stainless-steel containers or special bottles may also be used. Material, thread, bottle volume and installation conditions must suit the application.

The correct bottle thread is not determined solely by the bottle volume or approximate outside diameter. Check any existing markings and the original closure, and measure the outside diameter and core diameter as well as, where possible, the thread pitch and thread design. The fact that a cap can be screwed onto the bottle does not prove that the connection is technically correct. If there is any uncertainty, the container or original closure should be professionally checked.

Further information: SCAT thread identification

Threads with a similar outside diameter can have different pitches, core diameters, thread lengths or thread forms.

Information such as “45 mm thread” or “1-litre bottle” is therefore not sufficient for the unambiguous selection of a Safety Cap.

Examples of frequently confused threads include:

• GL 32 and S 32
• GL 45 and S 45
• S 50 and S 51
• GPI 38-400 and GPI 38-430

In some cases, a cap may appear to screw on even though the thread is not technically compatible.

Further information: Thread table for laboratory bottles

Only a compatible threaded connection ensures that the Safety Cap is mounted straight and fully and that the seal rests evenly on the bottle opening.

An incorrect thread can lead to leaks, mechanical stress and damage to the bottle or Safety Cap.

The Safety Cap must not be installed using excessive force.

The thread type, thread pitch, seal and condition of the bottle must be checked again. Stiffness can indicate an incorrect or damaged thread.

Further information: Thread adapters for laboratory bottles

A Safety Cap with a matching GL 45 internal thread is required for a GL 45 bottle.

In addition, the number of capillary ports, capillary diameters, vent valve, application type and, where applicable, requirements for PFAS-sensitive analyses must be considered.

Further information: HPLC Safety Caps for GL 45 bottles

A thread adapter is useful when the existing eluent bottle must be retained and no directly compatible HPLC Safety Cap is available.

A cap that fits the bottle thread directly is generally preferable because each additional connection increases system complexity. With an adapter, both threaded connections, the sealing surfaces, the installation height and the chemical suitability must therefore be checked.

Further information: Thread adapters for HPLC Safety Caps

Check the height of the Safety Cap and vent valve, the lateral space required for the capillaries and accessibility during bottle changes.

The capillaries must be capable of being routed without kinks and with minimal mechanical stress. A compatible threaded connection alone is therefore not sufficient.

PTFE offers particularly broad chemical resistance to numerous HPLC solvents, acids and bases.

The material is chemically inert and has proven itself as the standard material for conventional HPLC applications.

Further information: Conventional HPLC Safety Caps with PTFE core

For PFAS-sensitive applications and intentionally fluorine-free media paths, SCAT offers Safety Caps with a PEEK core.

PEEK is a fluorine-free high-performance polymer, mechanically stable and suitable for many typical HPLC eluents. Its chemical resistance must nevertheless be assessed for the specific application.

Further information: PFAS-sensitive HPLC supply with PEEK core

PP cores were previously used as an interim solution while no suitable PEEK core was available.

With the PEEK core, a solution with higher chemical and mechanical performance is now available for PFAS-sensitive applications. SCAT therefore no longer offers Safety Caps with a PP core.

A PFAS-free media path means that all media-contacting components relevant to the application are designed without PFAS or fluoropolymers.

A typical GreenLine configuration consists of:

• Suitable, non-fluorinated PE-HD bottle
• Safety Cap with PEEK core
• PEEK capillaries
• PE fittings
• PE blind plugs
• GreenLine vent valve
• UHMW-PE inlet filter

A single PEEK component or a PE-HD bottle therefore does not make the supply system completely PFAS-free. The decisive factor is a consistent assessment of the entire relevant media path.

Possible inputs from manufacture, packaging, cleaning, previous use and laboratory handling must also be considered. For sensitive methods, the complete system should be checked using blanks or system blanks.

Further information: Fluorine-free GreenLine HPLC supply; PFAS-sensitive HPLC supply sets

Glass surfaces can adsorb PFAS compounds that are already present and release them again under changed conditions.

In trace analysis, this can affect recovery and reproducibility. A suitable, non-fluorinated PE-HD bottle supports a fluorine-free media path and reduces glass-related adsorption effects.

No.

Manufacturing, packaging, cleaning, previous use and handling can also cause background signals. The complete media path must therefore be considered and checked using suitable blanks or system blanks.

No. The two materials meet different requirements.

PTFE is the established standard for conventional HPLC applications because it offers particularly broad chemical resistance and is flexible as a capillary material. PEEK is PFAS-free, mechanically more dimensionally stable and therefore particularly relevant for PFAS-sensitive or intentionally PFAS-free media paths. However, PEEK is stiffer, and its chemical resistance must be assessed for the specific application when unusually aggressive, strongly oxidising or highly concentrated media are used. Neither material is generally better; the specific method is what matters.

PEEK is suitable for numerous typical HPLC eluents.

For strongly oxidising, unusually aggressive or highly concentrated acidic media, elevated temperatures or long contact times, chemical resistance must be checked for the specific application.

PE can be resistant to many media, but as a permanently media-contacting Safety Cap core it does not offer the same broad chemical safety margin as PTFE.

This assessment must not be applied indiscriminately to other PE components. PE fittings, PE blind plugs and PE-HD bottles perform different functions and must be assessed on a component-specific basis.

PPS offers high chemical and thermal resistance, low water absorption and good dimensional stability.

The material therefore supports a mechanically stable and durable connection to the eluent bottle.

The outside diameter determines which fitting can mechanically secure and seal the capillary.

The inside diameter influences flow resistance, line volume, flushing time and possible flow rate.

For analytical applications, fittings are available for capillary outside diameters of 1.6 mm, 2.3 mm and 3.2 mm.

For preparative applications, depending on the design, ports for 4.0 mm, 4.76 mm and 6.35 mm are also available.

Further information: HPLC capillaries and fittings

The colour coding makes it easier to assign the fittings:

• Green: 1.6 mm
• Purple: 2.3 mm
• Blue: 3.2 mm

However, the colour does not replace checking the actual capillary outside diameter.

The fitting is the screw and fastening element.

The ferrule is the sealing element that is pressed against the capillary and sealing surface when tightened. In many SCAT fittings, the ferrule is already integrated.

The capillary should be as short as technically practical and as long as necessary for safe handling.

A line that is too short creates tensile forces. An unnecessarily long line increases line volume and extends flushing and changeover processes.

Installation is carried out in the following steps:

1. Determine the capillary outside diameter.

2. Select the appropriate fitting.

3. Feed the capillary through the fitting and Safety Cap.

4. Install the inlet filter.

5. Set the insertion depth.

6. Secure the capillary with the fitting.

7. Close unused ports with blind plugs.

8. Insert the vent valve.

9. Screw the Safety Cap onto the eluent bottle.

10. Fill and vent the line and prime the pump in accordance with the manufacturer's instructions.

Air in the supply capillary or inlet filter can cause air bubbles, delivery problems and fluctuating flow rates.

After initial installation and after changing a capillary or filter, the inlet filter and line must be fully wetted and vented.

Air or gas bubbles can enter the suction capillary or form within the solvent supply system. Possible causes include an inlet filter that is not fully immersed, an insufficient fill level, a kinked or damaged capillary, a clogged inlet filter, a vent valve with restricted function, or incomplete venting after a bottle change. Air can also be drawn into the system through leaks on the suction side without liquid necessarily leaking out. The entire solvent supply path from the bottle to the pump inlet should therefore first be checked systematically. If the problem persists, pump-side and instrument-side causes must also be considered.

First check the eluent level, filter position, capillaries, fittings, blind plugs and vent valve.

The line must then be vented and the pump primed in accordance with the manufacturer's instructions.

Capillaries, fittings, blind plugs, inlet filters, the vent valve, identification and all connections should be checked regularly.

Vent valves have a preventive replacement interval of six months. Other components are replaced if they are damaged, contaminated, deformed or malfunctioning.

During operation, the HPLC continuously withdraws eluent from the bottle. Without pressure equalisation, negative pressure would develop, which can impair delivery and promote the formation of air bubbles. The vent valve opens when required, allows filtered ambient air to enter and closes again after pressure equalisation. A permanently open bottle is not an equivalent substitute because solvent vapours can escape and ambient air, moisture or particles can enter in an uncontrolled manner.

Further information: Vent valves for HPLC eluent bottles

The vent valve contains a filter membrane and a non-return valve, also known as a duckbill valve.

The filter membrane retains particles from the ambient air. Under negative pressure, the valve opens towards the inside of the bottle and closes again after pressure equalisation.

The permanent connection between the lower housing section and the cover reduces potential points for secondary air ingress.

The incoming air should flow exclusively through the intended path via the filter membrane and valve.

The standard vent valve has a PTFE filter membrane and is intended for conventional analytical and preparative HPLC applications.

The GreenLine vent valve uses a fluorine-free filter membrane and is part of a coordinated PFAS-sensitive supply system.

SCAT-Vent valvee besitzen ein Gewinde mit der Bezeichnung UNF 1/4" 28G.

The valve is screwed into the designated port of a compatible Safety Cap.

The Luer-Lock connection enables special applications, for example:

• Purging the eluent with gas
• Protecting oxidation-sensitive eluents
• Connecting a drying tube
• Reducing moisture ingress

Suitability depends on the application, the medium and the operational requirements.

SCAT specifies a service life of six months for standard and GreenLine vent valves. After this period, the complete valve is replaced preventively, even if no visible changes can be detected. Earlier replacement is required if the valve is damaged, heavily contaminated, wetted or flooded with eluent, or if pressure equalisation no longer functions reliably. The replacement date should be documented directly on the valve or in the maintenance plan.

The inlet filter is located at the lower end of the supply capillary.

It retains particles, precipitates and solid contaminants before they enter the capillary and the HPLC system.

Further information: Inlet filters for HPLC eluent bottles

The vent valve filters the ambient air entering the bottle.

The inlet filter filters the liquid eluent before it enters the supply capillary.

For conventional applications, an inlet filter made of PFA/PTFE with a pore size of 5 µm is available.

For PFAS-sensitive systems, a fluorine-free version made of UHMW-PE with a pore size of 20 µm is used. The different pore size must be taken into account in system design and priming.

No.

A smaller pore size retains finer particles but can increase flow resistance and clog more quickly. Filter area, filter geometry, viscosity and flow rate must be considered together.

Replacement is required in the event of:

• Visible deposits
• Discolouration
• Damage
• Restricted flow rate
• Recurring air bubbles
• Unusual suction behaviour
• Insufficient hold on the capillary

There is no generally applicable purely time-based replacement interval for inlet filters.

A Safety Waste Cap is a safety closure for HPLC waste containers.

It accommodates waste capillaries or tubing, closes the container and allows an exhaust filter to be connected.

Further information: Safety Waste Caps for HPLC waste

A closed HPLC waste disposal system reduces the uncontrolled release of solvent vapours and directs waste in a controlled manner into a closed collection container.

However, it does not replace the risk assessment or any required fire and explosion protection measures.

Yes, provided that sufficient ports are available and the canister volume, maximum inflow rate, level monitoring and waste disposal concept are designed accordingly.

The waste volume from all connected systems must be considered together.

The Safety Waste Cap must match the thread of the canister.

In addition, the seal, number and type of ports, capillary and tubing diameters, blind plugs, filter connection and potential for later expansion are decisive.

Further information: HPLC waste disposal systems and Safety Waste Caps

Typical capillary ports are designed for outside diameters of 1.6 mm, 2.3 mm or 3.2 mm.

For larger smooth tubing or corrugated tubing, hose barbs or special hose connections may be required. All components must fit together tightly and securely from a mechanical perspective.

Open ports compromise the closed waste disposal system and can lead to vapour emissions or liquid leakage.

All unused ports must therefore be closed with suitable blind plugs.

LISA has a modular design and can be extended or converted when requirements change.

In practice, LISA is used predominantly as a Safety Waste Cap. Technically, it can also be configured for HPLC solvent supply. For this purpose, the GL14 connection for the exhaust filter is closed with a blind plug and a vent valve is installed instead of a fitting.

This supply application is technically possible, but is only rarely used in practice.

Further information: LISA Safety Waste Cap system

An activated carbon exhaust filter adsorbs solvent vapours from the headspace of the collection container.

This reduces the burden on laboratory air caused by uncontrolled solvent vapour emissions.

Further information: Activated carbon exhaust filters for HPLC waste

The three-layer activated carbon system is designed for different volatile components.

It adsorbs:

• Organic solvent vapours
• Volatile acidic components
• Volatile basic components

Non-volatile buffer salts do not enter the exhaust filter as vapour.

The following recommended replacement intervals apply to SCAT standard HPLC exhaust filters:

• S filter: 3 months
• M filter: 6 months
• L filter: 12 months

A particularly high vapour load may require earlier replacement. The stated periods are preventive replacement intervals and not a metrological indication of actual filter saturation.

A Timestrip indicates the passage of a defined period of time.

It does not measure the chemical load or saturation of the exhaust filter, but only the time that has elapsed since activation.

At SCAT, red identifies components that are relevant for maintenance and replacement.

This makes visual inspection easier and supports timely maintenance or scheduled replacement.

The PE pre-filter prevents ash fractions from the activated carbon, activated carbon particles or carbon dust from entering the collection container.

This keeps loose activated carbon components safely inside the filter housing.

The CTC value is a standardised parameter for the adsorption activity of activated carbon in the gas phase.

The specific surface area describes the internal and external surface area determined by gas adsorption. The special activated carbon used by SCAT achieves a specific surface area of up to 1,500 m²/g in accordance with DIN ISO 9277.

Both values help characterise the activated carbon, but they do not allow the service life for every solvent to be predicted precisely.

SCAT HPLC exhaust filters generally have a GL14 external thread.

Compatible Safety Waste Caps have a GL14 internal thread. Exhaust filters with other connection threads are available for drums and larger collection containers.

Further information: HPLC exhaust filters

PE-HD canisters are used for many typical HPLC waste mixtures.

However, suitability always depends on the specific waste mixture, collection and storage duration, canister volume, disposal route and safety requirements.

Further information: HPLC waste canisters

The waste profile describes the type and composition of the solvents and additives, flammability, volatility and the quantity of waste generated.

Without this information, the canister material, volume and safety concept cannot be selected reliably.

The waste volume should be related to a period of time, for example per hour, day, week or disposal cycle.

Peak volumes, HPLC systems operated in parallel, and night and weekend operation must also be taken into account.

Before selection, it must be clarified whether the filled canister will be passed on as the complete waste package or decanted internally into a larger collection container.

This affects canister type, reuse, labelling, transport, interim storage and safety measures.

For many types of HPLC waste, PE-HD is the standard material.

Depending on the application, the following variants may be suitable:

• PE-HD for many typical HPLC waste mixtures
• PE-HD-EL where electrical conductivity is required
• Fluorinated PE-HD where enhanced barrier properties are required
• PP for selected chemical applications

Chemical resistance must always be checked against the specific waste mixture.

Further information: HPLC waste canisters; Conductive PE-HD-EL canisters

PE-HD is used for many methanol-containing HPLC waste mixtures.

Suitability must nevertheless be checked for the specific mixture, taking into account concentration, temperature, contact time and storage duration.

PE-HD can be suitable for many acetonitrile-containing HPLC waste mixtures.

For longer collection or storage periods, permeation, odour emissions and possible weight losses should also be assessed.

Fluorinated PE-HD canisters have improved barrier properties.

For solvents where permeation is critical, or for longer collection and storage periods, they can reduce permeation, odour emissions and weight loss through the canister wall.

Fluorinated canisters concern the disposal side. They are not intended for PFAS-sensitive supply systems.

Further information: Fluorinated HPLC waste canisters

PE-HD-EL should be considered where electrostatic charging may be relevant to safety.

Whether a conductive canister is required depends on the waste mixture, container size, installation location, handling method and operational risk assessment.

Further information: Conductive PE-HD-EL canisters

Electrical conductivity is achieved by conductive additives in the polymer.

As a result, PE-HD-EL canisters are usually black and the fill level cannot be seen from the outside. Suitable level monitoring is therefore particularly important.

Further information: PE-HD-EL canisters with level monitoring

The canister size must match the waste volume and the intended replacement interval.

In many HPLC laboratories, 5- or 10-litre canisters are practical. Larger containers provide more collection volume, but become heavier, require more floor space and place greater demands on handling.

Depending on the liquid and the weight of the container itself, a full 20-litre canister can weigh significantly more than 20 kg.

This makes lifting, carrying and transport more difficult. Handle design, transport trolleys, transport route and, where applicable, two-person handling must be considered.

The canister must remain stable even with the Safety Waste Cap, exhaust filter and connected lines installed.

Hose forces, a tall filter assembly or a narrow canister geometry must not cause it to tip over. Feet or holders may be useful for space-saving canisters.

This depends on the canister type, condition of the material, contamination, cleaning, labelling and operational requirements.

For high-quality special canisters, reuse can be appropriate. However, it must form part of a defined cleaning, disposal and safety concept.

Level monitoring is particularly important when the canister is not clearly visible, is positioned under the laboratory bench or in a safety cabinet, when several HPLC systems are connected, or when the system operates unattended.

It helps prevent overfilling, backflow and leakage.

Further information: Level monitoring for laboratory containers

Possible solutions include:

• Visual inspection
• Mechanical float
• Electronic sensor
• Capacitive sensor
• Sensor with signal box

The appropriate solution depends on the canister, installation location, visibility and safety requirements.

Further information: Sensors and signal boxes for level monitoring

With black PE-HD-EL canisters, concealed installation or unattended operation, the fill level cannot be assessed reliably by visual inspection.

In these cases, mechanical or electronic level monitoring is useful.

If waste can no longer flow freely into the canister, liquid backs up in the waste lines.

In an unfavourable case, this can result in backflow towards the HPLC system or damage to connected components.

A spill tray collects liquid in the event of overfilling, leaks or other leakage.

This prevents flammable, harmful or odorous solvent waste from entering the laboratory area in an uncontrolled manner.

Further information: Spill trays for laboratory containers

A leak sensor detects escaping liquid in a spill tray at an early stage.

In combination with a signal box, a visual or audible alarm can be triggered. Depending on the system design, additional functions can also be controlled.

Further information: Leak sensors for spill trays

For overnight or weekend operation, the waste volume, canister volume, replacement interval and level monitoring must be coordinated so that the canister does not become full during the unattended period.

Backflow and leakage risks must also be considered.

The replacement interval depends on the waste volume, canister volume and operating mode.

The canister must always be changed or emptied before the maximum permissible fill level is reached. A sufficient safety margin must be planned for unattended operating periods.

PE-HD-EL is electrically conductive high-density polyethylene.

It is used, among other applications, for canisters, collection containers, Safety Waste Caps and safety funnels when electrostatic charges must be dissipated in a controlled manner.

Further information: Conductive waste disposal systems for HPLC waste

A conductive material can dissipate electrostatic charges safely only if there is a conductive connection to earth or to a suitable equipotential bonding system.

Without this connection, even a conductive container can become electrostatically charged.

TRGS 727 describes measures for preventing ignition hazards caused by electrostatic charging.

For certain applications involving insulating containers in potentially explosive atmospheres, volume limits and protective measures are specified. The requirements applicable to the specific laboratory must be assessed as part of the risk assessment.

No.

The decision depends, among other things, on the waste mixture, container size, installation location, handling method, possible explosive atmosphere and operational risk assessment.

No.

Depending on the application, the Safety Waste Cap, lines, funnels, earthing, equipotential bonding, ventilation, installation location and organisational measures must also be considered.

UN approval is relevant when the filled canister is transported as dangerous goods or passed into a corresponding disposal process.

Whether it is required depends on the specific waste mixture, transport route and the requirements of the disposal company.

The UN marking shows that the packaging design has been tested in accordance with dangerous goods regulations.

It includes information such as:

• Packaging type
• Material
• Permitted packing group
• Maximum relative density
• Test pressure
• Year of manufacture
• Approval authority

The complete marking must always be assessed as a whole.

The code 3H1 denotes a plastic canister with a non-removable top or non-removable closure.

The code describes only part of the complete UN marking. The other information must also be considered in the assessment.

No.

The specific waste mixture must be compatible with the complete UN approval and marking of the canister. Items to be checked include the dangerous goods class, packing group, density, vapour pressure and chemical resistance.

No.

In addition, the closure, labelling, mode of transport, quantity provisions, documentation and further requirements of the applicable dangerous goods legislation must be met.

Safety Solutions comprise decentralised products and systems directly at individual laboratory instruments, for example Safety Caps, Safety Waste Caps, canisters, exhaust filters and level monitoring systems.

SymLine is a modular piping and waste disposal system for central collection of solvent waste from several HPLC systems or laboratory areas.

Further information: SymLine piping and waste disposal system

A quick coupling allows lines to be connected or disconnected quickly and without tools.

Depending on the design, the coupling halves close automatically when disconnected, thereby reducing liquid leakage and dripping.

Further information: Quick couplings for laboratory applications

The ball valve automatically closes the filling path after filling.

The hinged lid additionally covers the filling area and reduces evaporation of residual liquid. The two functions complement each other.

Further information: ARNOLD safety funnel

Yes. In addition to its standard range, SCAT also develops customer-specific solutions.

These include, for example:

• Safety Caps for special threads
• Individual connection configurations
• Customer-specific canister solutions
• Special waste disposal systems
• Piping systems
• Customer-specific assemblies

Technical feasibility depends on the media used, the container type and the specific operating conditions.

Further information: Customer-specific laboratory solutions and custom-made products

SCAT focuses on durable, modular and replaceable components.

These include expandable product systems, replaceable filters and wear parts, as well as replacement components for existing systems. Controlled closed supply systems can also reduce evaporation losses and extend the service life of existing system components.