Solvent Types: Identification, Storage and Spill Control

Solvents are widely used across UK industry for cleaning, degreasing, printing, coatings, adhesives and laboratory work. The problem is that different solvent types behave very differently in storage and when spilled. This page answers the most common questions about solvent types, what risks they present, and the practical spill management controls that help you prevent incidents, protect drains and stay compliant.

Question: What do we mean by "solvent types"?

Solution: In spill control, "solvent types" usually means grouping solvents by how they behave: flammability, volatility, water miscibility, toxicity, and compatibility with plastics and absorbents. Knowing the type helps you choose the right storage, bunding, spill kits, PPE and disposal route.

Question: Which solvent types are most common in workplaces?

Solution: Most sites encounter one or more of the categories below. Always confirm the exact product hazards using the supplier Safety Data Sheet (SDS) and the CLP label.

• Alcohols (e.g., IPA/isopropanol, ethanol): fast evaporating, typically flammable, often water-miscible.
• Ketones (e.g., acetone, MEK): very volatile, flammable, strong degreasing, can attack some plastics.
• Esters (e.g., ethyl acetate): flammable, often used in inks and coatings, strong odour.
• Hydrocarbons (aliphatic and aromatic)
• Aliphatic (e.g., white spirit, hexane): flammable, usually not water-miscible, persistent sheen on water if released.
• Aromatic (e.g., toluene, xylene): flammable, higher toxicity concerns, strong solvency power.
• Chlorinated solvents (e.g., dichloromethane): often not readily flammable but can be toxic; vapours can collect in low points.
• Glycol ethers (various cleaners): can be combustible and water-miscible; check health hazards.
• Specialist blends (trade-name cleaners and thinners): mixed hazards, always treat as unknown until SDS is checked.

Question: Why does solvent type matter for spill control and absorbents?

Solution: Solvent type affects how quickly a spill spreads, how much vapour is produced, and whether the liquid will enter drains or watercourses. It also affects what your spill kit should contain.

• Volatile solvents (e.g., acetone, IPA) can create a flammable atmosphere quickly. Your spill response must prioritise ignition control and ventilation.
• Water-miscible solvents can travel with wash-down water and may be harder to contain if you rely on oil-only products. Check absorbent compatibility and use proper drain protection.
• Non-water-miscible solvents can float and spread over water if they reach a drain, increasing environmental impact and clean-up cost.

For practical spill response equipment, see Serpro spill control products such as spill kits, absorbents and drain protection.

Question: How do we identify the solvent type quickly on site?

Solution: Use a consistent identification process that does not rely on smell or appearance.

1. Read the label and pictograms (CLP). Look for flame, health hazard, exclamation mark, and environmental symbols.
2. Check the SDS for flash point, vapour pressure, water solubility and incompatibilities.
3. Verify container and location: process areas (e.g., print room, wash-up station, lab bench) can indicate likely solvent groups.
4. If unsure, treat as high risk: control ignition sources, use chemical-resistant PPE, protect drains, and call a competent person.

Question: What spill risks are specific to flammable solvents?

Solution: Flammable solvents present a rapid escalation risk because vapours can ignite even when the liquid volume looks small.

• Immediate actions: stop the source if safe, eliminate ignition sources, increase ventilation, isolate the area.
• Containment: use absorbent socks/booms to prevent spread and keep solvent away from drains.
• Absorption: apply appropriate chemical absorbent pads/granules. Do not hose down.
• Waste control: place used absorbents into compatible, lidded waste containers and label for hazardous waste disposal.

Good practice is to store flammable solvent containers within appropriate secondary containment such as drip trays and bunding so leaks do not become uncontrolled spills.

Question: How should solvent storage change by solvent type?

Solution: Storage should be based on hazard, compatibility, and the potential for spills to reach drains.

• Segregate incompatible chemicals (check SDS). Some solvents can react with oxidisers or certain acids.
• Use bunded storage for drums, IBCs and bulk containers. Bunding reduces the risk of pollution if a container fails.
• Control decanting: use drip trays under taps, pumps and filling points to capture splashes and drips.
• Keep spill kits close: locate spill kits at delivery points, wash-up areas, labs and waste storage.

Question: What is the best way to protect drains from solvent spills?

Solution: Plan for the fastest route a solvent spill can take to a drain, then block it early. Drain contamination is one of the costliest outcomes of solvent incidents.

• Pre-position drain protection near solvent use areas, especially where there are floor gullies or interceptors.
• Train staff to deploy drain covers quickly, then contain and absorb the spill.
• Use bunding and drip trays to stop routine leaks becoming drain entries.

For equipment options see drain protection and spill kits.

Question: What compliance issues apply to solvent spills in the UK?

Solution: Solvent management is not only a safety issue, it is an environmental compliance issue. Controls should support your site risk assessment, COSHH processes, fire risk controls and pollution prevention planning.

• Environmental protection: prevent solvents entering surface water drains and watercourses. The Environment Agency and other UK regulators can take enforcement action for pollution incidents.
• Hazard communication: CLP classification and SDS information should be accessible to staff.
• Waste management: solvent-contaminated absorbents are commonly hazardous waste; store and dispose of them correctly.
• Fire safety: flammable solvent storage and spill response should align with DSEAR expectations and site fire precautions.

Citations: UK Health and Safety Executive (HSE) guidance on DSEAR and flammable liquids: https://www.hse.gov.uk/fireandexplosion/dsear.htm. HSE COSHH overview: https://www.hse.gov.uk/coshh/. Environment Agency incident reporting (England): https://www.gov.uk/report-an-environmental-incident.

Question: What are real operational examples where solvent type changes the plan?

Solution: Use solvent type to set the response standard for each area.

• Photo labs and imaging workflows: cleaning solvents and process chemicals may be handled in small volumes but used frequently. Frequent decanting increases spill likelihood, so drip trays at benches and drain protection nearby are practical controls. Related reading: Solvent Management in Photo Labs.
• Printing and packaging: ink solvents such as esters and alcohols can generate flammable vapours. Response plans should emphasise ignition control and fast containment at wash-up stations.
• Maintenance workshops: degreasers and thinners may be hydrocarbon-based; spills can spread and track on footwear. Use absorbent rolls for walkways and keep spill kits at tool stores.
• Labs and quality rooms: small containers, high hazard. Keep compatible absorbents, clear labelling, and a defined waste route for contaminated materials.

Question: What should a solvent spill kit contain?

Solution: Build the kit around the solvent types you use, typical spill size, and where the spill could go (especially drains). Many sites standardise on chemical spill kits for unknowns, then add drain protection and dedicated containers for waste.

• Absorbent pads, socks and pillows suitable for chemical spills
• Disposal bags and ties, labels, and instructions
• PPE appropriate to your risk assessment (gloves, eye protection)
• Drain cover or drain blockers where there are nearby gullies
• Optional: non-sparking tools for certain flammable solvent areas (site-specific decision)

Browse options: spill kits and drain protection.

Question: How do we reduce solvent spills before they happen?

Solution: Combine engineering controls with simple daily discipline.

1. Use secondary containment (bunding, drip trays) at storage and decant points.
2. Improve handling with correct caps, taps, pumps and clearly marked containers.
3. Housekeeping: keep floor gullies visible, do not store solvent containers where they can be knocked.
4. Training and drills: make spill response a routine skill, not an emergency improvisation.
5. Review near misses: solvent type and location data helps you target recurring risks.

Need help selecting spill control for your solvent types?

Serpro supplies spill control products designed for solvent storage, handling and emergency response, including absorbents, spill kits, drain protection, drip trays and bunding. If you share the solvent list (or SDS), container sizes and where drains are located, you can match solvent type to a practical, compliant spill response plan.