Summary. Toluene (CAS 108-88-3) is a highly flammable Class 3 liquid, UN 1294, Packing Group II, with a 4 °C closed-cup flash point. Store it tightly closed, cool and ventilated, away from oxidisers and ignition sources, and bond and ground during transfer. Hazard data comes from our SDS Rev 3.1; practical steps are general good practice, so follow your site safety procedures.
Why toluene needs careful storage
Toluene is an aromatic solvent used by paint, adhesive, ink and rubber manufacturers. Its flash point is 4 °C, so a container of toluene can give off enough vapour to ignite at ordinary ambient temperatures (general knowledge). The question in a store is therefore not whether it is warm enough to burn but whether there is a source of ignition near the vapour.
This guide is specific to toluene. For the general rules on segregating flammables, corrosives and oxidisers, see our chemical storage and handling basics. For the product itself, see the toluene product page.
The hazard numbers that drive storage
| Property | Value | What it means in the store |
|---|---|---|
| Flash point | 4 °C closed cup | Vapour can ignite at normal ambient temperature |
| Boiling point | 110.6 °C | Evaporates readily in warm weather |
| Auto-ignition temperature | 480 °C | Keep heat sources and hot surfaces away from vapour |
| Explosive limits in air | LEL 1.1%, UEL 7.1% v/v | A small leak in a closed space can reach the flammable range |
| Vapour density (air = 1) | 3.14 | Vapour sinks and collects in low areas, drains and pits |
| Vapour pressure | 28.4 mmHg at 20 °C | Open containers release vapour continuously |
| Density | 0.867 g/cm3 at 20 °C | Lighter than water; it floats and spreads on water |
Source: SPC SDS Rev 3.1, section 9, and SPC product data. Typical values.
Storage conditions
The SDS asks for storage in original, tightly closed, compatible containers in a cool, well-ventilated area away from ignition sources and heat. Practical points that follow from that:
- Ventilate at low level. Vapour is heavier than air, so ventilation must reach the floor, not only the roof.
- Remove ignition sources. No open flames, sparks or hot work; use explosion-proof electrical, ventilating and lighting equipment.
- Keep closed. Close bungs and valves after every use to limit vapour release.
- Segregate. Keep away from incompatible chemicals.
Incompatibles
Per SDS section 10, keep toluene away from strong oxidising agents, concentrated acids and halogens. General good practice, not SDS text: store it in a different bay or cabinet from these, with spill containment that does not drain into a shared sump.
Earthing and bonding
Moving a low-conductivity liquid through hoses and pipes can build static charge, and a spark at the wrong moment can ignite the vapour. The SDS says to bond and ground containers and receiving equipment during transfer, to use non-sparking tools, and to take precautionary measures against static discharge. The steps below are general good practice, not SDS text:
- Connect the bonding lead between the supply vessel and the receiving vessel before opening anything.
- Ground both to a verified earth point.
- Fill slowly, with the hose end below the liquid surface where the equipment allows, to limit splashing.
- Do not disconnect the bonding lead until the transfer is finished and the vessels have settled.
Drums, IBCs and tankers
Our product data lists toluene in 200 L MS barrels, 1000 L IBC tanks and bulk road tankers; packs are confirmed per enquiry, and the nitration-grade TDS is for tanker supply. The weights below are arithmetic from density, not net weights of a supplied pack.
| Pack | Capacity | Liquid weight at 0.867 g/cm3 |
|---|---|---|
| 200 L MS barrel | 200 L | About 173 kg |
| 1000 L IBC tank | 1000 L | About 867 kg |
General practice, not SDS text: use these figures to plan lifting, add the weight of the container itself, keep barrels upright with bungs tight, check that any IBC is suitable for flammable liquids, and plan a bonded, earthed receiving point for tankers.
Health hazards in handling
The SDS lists H225 (highly flammable), H304 (may be fatal if swallowed and enters airways), H315 (skin irritation), H332 (harmful if inhaled), H335 (respiratory irritation), H336 (drowsiness or dizziness), H361 (suspected of damaging fertility or the unborn child), H373 (organ damage on prolonged exposure) and H412 (harmful to aquatic life with long-lasting effects). Signal word: Danger.
- Ventilation. Use local exhaust ventilation or closed handling to keep vapour below exposure limits.
- Exposure limits quoted in the SDS. OSHA PEL 200 ppm TWA, NIOSH REL 100 ppm TWA and ACGIH TLV 20 ppm TWA. Confirm the currently notified Indian limit.
- Protection. The SDS names nitrile, butyl rubber or neoprene gloves; follow SDS section 8 for eye and respiratory protection.
- Swallowing. Do not induce vomiting because of the aspiration hazard; call a poison centre or doctor.
Spills and fire
For fire, the SDS lists dry chemical powder, CO2, foam or sand. Water spray can cool containers, but a direct water jet may spread the burning liquid, and toluene floats on water. Vapours can travel to a distant ignition source and flash back, and sealed containers can rupture when heated. For spills, remove ignition sources, ventilate, contain the liquid and stop it entering drains. Follow your site emergency plan and the full SDS.
Transport: UN 1294
| Parameter | Value |
|---|---|
| UN number | UN 1294 |
| Proper shipping name | TOLUENE |
| Class | 3 (flammable liquid) |
| Packing group | II |
Source: SPC SDS Rev 3.1, section 14. Verify current carrier rules for road, sea or air before shipment.
Containers need the Class 3 label, UN 1294, packing group II and the product name. The HSN code for customs and GST paperwork is 2902 30 00.
A short storage checklist
- Tightly closed original containers, upright, in a cool, ventilated area.
- No ignition sources; explosion-proof lighting and electrics; non-sparking tools.
- Low-level ventilation, because the vapour is heavier than air.
- Bonding and earthing for every transfer.
- Oxidisers, concentrated acids and halogens kept separate.
- SDS, spill kit and suitable extinguishers within reach.
Where to go next
Download the SDS and the nitration-grade TDS from the toluene page, and read our Chennai toluene supplier guide for ordering. Send us the grade, quantity, pack and location and we quote within 4 working hours; a batch Certificate of Analysis is supplied with every delivery.