☣️ Hazardous Chemicals Safety Reference | Class 3 of 6

Flammable & Combustible Liquids & Gases

Storage, handling, process hazards, PPE and emergency procedures for 15 flammable liquids and gases commonly used as fuels, solvents and process feedstocks in Gujarat's manufacturing sector.

Chemicals15
FlammablesClass 3
Licensing ApplicablePESO
Electrical ClassificationZone 1/2

πŸ”₯ Class Overview β€” Flammable & Combustible Liquids / Gases

πŸ“‘ Jump to a Chemical

Diesel / HSD (High Speed Diesel)
Also known as: Diesel fuel / gas oil
Industrial Uses
DG sets, boilers, furnaces, construction machinery, transport
STORAGE HAZARDS
Flash point 52–96Β°C; store in earthed tanks with overflow prevention; vapour accumulates in tank ullage space
HANDLING HAZARDS
Less volatile than petrol but still flammable; skin defatting with prolonged contact; static generation during pumping
PROCESS HAZARDS
Hot surfaces ignite diesel vapour; contaminated diesel with petrol lowers flash point dangerously; tank cleaning β€” Oβ‚‚-deficient atmospheres

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Safety goggles for transfer operations
  2. Nitrile gloves for prolonged contact
  3. Antistatic footwear during pumping
  4. Fire-resistant coverall for hot-work near diesel

🚨 Emergency Procedure β€” Large Spill / Major Leak

1Foam or dry powder extinguisher β€” do NOT use water jet
2Shut off supply valve; earthing to eliminate static ignition
3Contain spill with earthen bunds; do not allow to drain to stormwater
4Vapour in confined space: ventilate before entry; LEL monitor mandatory
Petrol / Gasoline (Motor Spirit)
Also known as: Petrol / MS
Industrial Uses
Vehicles, portable generators, solvent (cleaning), extraction
STORAGE HAZARDS
Flash point βˆ’43Β°C β€” extremely high fire risk; storage requires PESO licence; earthed underground or above-ground tanks; no ignition sources within 15m
HANDLING HAZARDS
Vapour heavier than air β€” pools in drains and pits; even small static spark ignites; rapid skin absorption of aromatic fraction (benzene risk)
PROCESS HAZARDS
Pumping generates static β€” earthing and bonding mandatory; tank cleaning in confined space β€” explosive atmosphere and oxygen deficiency

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Anti-static coverall and footwear (mandatory)
  2. Nitrile gloves for skin contact
  3. Chemical goggles
  4. Full face SCBA for tank entry

🚨 Emergency Procedure β€” Large Spill / Major Leak

1No naked flames or electrical switches in area
2Foam or COβ‚‚ extinguisher β€” NO water
3Evacuate all non-essential personnel 100m radius
4Earth bonding before pumping resumes
5Emergency: CFRS notification; PESO for large storage incidents
Methanol (CH₃OH)
Also known as: Wood spirit / methyl alcohol
Industrial Uses
Solvent, biodiesel feedstock, antifreeze, formaldehyde production
STORAGE HAZARDS
Flash point 11Β°C; ATEX-rated flammable store; earthing required; segregate from oxidisers and acids
HANDLING HAZARDS
Invisible flame in daylight; fatal if ingested (10 ml blindness, 30 ml lethal); absorbed through intact skin
PROCESS HAZARDS
Vapour heavier than air; CO and formaldehyde generated in fire; forms explosive mixture

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Butyl rubber gloves (not nitrile β€” permeates rapidly)
  2. Chemical splash goggles
  3. Anti-static clothing
  4. SCBA for spill response

🚨 Emergency Procedure β€” Large Spill / Major Leak

1COβ‚‚ or dry powder extinguisher
2Evacuate ignition sources; ventilate
3If ingested/inhaled: immediate hospital β€” antidote ethanol/fomepizole
4Spill: absorb with dry sand; no drains
5Workers with skin contact: urine formate test
Ethanol / IPA (Cβ‚‚Hβ‚…OH / (CH₃)β‚‚CHOH)
Also known as: Ethyl alcohol / isopropyl alcohol
Industrial Uses
Pharmaceuticals, cosmetics, disinfectants, sanitisers, solvents
STORAGE HAZARDS
Flash point 13Β°C (ethanol), 12Β°C (IPA); flammable store with earthing; keep away from oxidisers, peroxides
HANDLING HAZARDS
Narcotic at high vapour conc.; vapour-air explosive; dehydrates skin causing dermatitis; IPA more irritating than ethanol
PROCESS HAZARDS
Spray application creates explosive aerosol; drum heating in summer β€” pressure and vapour increase

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Anti-static clothing and footwear
  2. Nitrile gloves
  3. OV respirator cartridge for confined use
  4. Safety goggles for spraying

🚨 Emergency Procedure β€” Large Spill / Major Leak

1Alcohol-resistant foam or COβ‚‚ for fire
2Remove ignition sources; ventilate
3Absorb spill with dry sand; no sewers
4Inhalation: fresh air; medical if symptoms persist
Acetone (CH₃COCH₃)
Also known as: Propanone / dimethyl ketone
Industrial Uses
Paint thinner, varnish, plastics, adhesives, FRP manufacture, labs
STORAGE HAZARDS
Flash point βˆ’18Β°C β€” extreme fire hazard; earthed flammable cabinet; away from heat and oxidisers
HANDLING HAZARDS
Vapour heavier than air, narcotic at high conc.; degreases skin; dissolves many plastics β€” check compatibility
PROCESS HAZARDS
Static from flow ignites; explosive range 2.5–12.8%; dissolves nitrile gloves β€” replace frequently

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Nitrile gloves (short-term only; replace frequently)
  2. Chemical goggles
  3. Anti-static footwear
  4. OV respirator for enclosed work

🚨 Emergency Procedure β€” Large Spill / Major Leak

1COβ‚‚ or dry powder for fire
2Eliminate ignition sources; evacuate low areas (vapour sinks)
3Absorb with dry sand; seal in containers
4Ventilate thoroughly before re-entry
Toluene (C₇Hβ‚ˆ)
Also known as: Methylbenzene / toluol
Industrial Uses
Paints, inks, adhesives, rubber, dyes, pharmaceuticals
STORAGE HAZARDS
Flash point 4Β°C; store in earthed flammable cabinet; vapour denser than air β€” accumulates low
HANDLING HAZARDS
CNS depressant β€” headache, dizziness, narcosis; hepatotoxic on chronic exposure; reproductive hazard
PROCESS HAZARDS
High evaporation rate creates vapour accumulation quickly; static ignition risk

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Nitrile or neoprene gloves
  2. Chemical goggles
  3. OV respirator mandatory for spray/open use
  4. Anti-static clothing

🚨 Emergency Procedure β€” Large Spill / Major Leak

1COβ‚‚, foam, or dry powder for fire
2Evacuate area; eliminate ignition sources
3Absorb spill with dry sand; no drains
4Inhalation: fresh air; prolonged exposure β€” liver function monitoring
Benzene (C₆H₆)
Also known as: Benzol
Industrial Uses
Chemical synthesis feedstock (regulated use only in India); present as impurity in toluene/xylene
STORAGE HAZARDS
Flash point βˆ’11Β°C; confirmed human carcinogen (IARC Group 1); exposure limit very low (1 ppm TWA); store minimally
HANDLING HAZARDS
Absorbed through skin and by inhalation; causes bone marrow suppression β€” aplastic anaemia, leukaemia on chronic exposure
PROCESS HAZARDS
Even brief exposures above 25 ppm are dangerous; present as impurity in many aromatic solvents

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Supplied air respirator (not cartridge APR β€” breakthrough rapid)
  2. Butyl rubber gloves
  3. Full encapsulating suit for spill response
  4. Benzene-specific air monitoring mandatory

🚨 Emergency Procedure β€” Large Spill / Major Leak

1Medical surveillance mandatory for any exposure
2Evacuate; eliminate ignition sources
3Spill: contain; vapour monitor before entry
4Exposed workers: blood benzene + CBC monitoring
5Report to DISH β€” Schedule chemical under OSH Code 2020
Xylene (Cβ‚ˆH₁₀) Isomers
Also known as: Xylol / dimethylbenzene (o/m/p)
Industrial Uses
Paints, varnishes, adhesives, printing inks, leather processing
STORAGE HAZARDS
Flash point ~27Β°C; flammable; store in earthed containers in ventilated cool location
HANDLING HAZARDS
Less acutely toxic than benzene; CNS depressant; reproductive hazard; narcotic at high concentrations
PROCESS HAZARDS
High vapour pressure at ambient temperature; static ignition in pumping operations

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Nitrile gloves
  2. Chemical goggles
  3. OV respirator for open/spray use
  4. Anti-static footwear

🚨 Emergency Procedure β€” Large Spill / Major Leak

1COβ‚‚ or foam for fire
2Remove ignition sources; ventilate
3Absorb spill with dry sand
4Medical surveillance for chronic occupational exposure
Hexane (n-Hexane, C₆H₁₄)
Also known as: Normal hexane
Industrial Uses
Edible oil extraction, adhesives (shoe/rubber industry), labs, cleaning
STORAGE HAZARDS
Flash point βˆ’22Β°C; extremely flammable; store earthed in cool ventilated area
HANDLING HAZARDS
Peripheral neuropathy (polyneuritis) from chronic low-level exposure β€” insidious and progressive; causes skin defatting
PROCESS HAZARDS
Very high evaporation rate β€” explosive atmosphere builds rapidly in processing rooms; vapour heavier than air

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Butyl rubber gloves (permeates nitrile)
  2. Chemical goggles
  3. OV respirator β€” mandatory in extraction plants
  4. Anti-static clothing and footwear

🚨 Emergency Procedure β€” Large Spill / Major Leak

1COβ‚‚ or dry powder for fire
2Ventilate from top (hexane vapour sinks)
3Absorb spill β€” no drains, sources of ignition
4Neurological testing (nerve conduction) for chronically exposed workers
Acetylene (Cβ‚‚Hβ‚‚)
Also known as: Ethyne / welding gas
Industrial Uses
Oxy-acetylene welding, cutting, brazing
STORAGE HAZARDS
Unstable above 1.5 bar pressure; cylinders must be stored upright, with valve cap on; incompatible with copper/silver/mercury β€” explosive acetylides
HANDLING HAZARDS
Back-flash from torch into cylinder is lethal; wide explosive range 2.5–100%; lighter than air β€” accumulates at ceiling
PROCESS HAZARDS
Spontaneously explosive at >200 kPa in pure form; valve damage can cause uncontrolled release and fire

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Welding shield (auto-darkening) for torch work
  2. Flame-resistant welding gloves and coverall
  3. Safety boots with steel toe
  4. Welding-grade fume respirator

🚨 Emergency Procedure β€” Large Spill / Major Leak

1Do NOT extinguish acetylene fire unless source is safely shut off β€” re-ignition risk creates BLEVE
2Cool cylinder with water if exposed to heat; remove to open area
3Notify fire brigade immediately for cylinder fires
4Evacuate 100m minimum for uncontrolled release
LPG (Propane / Butane mixture)
Also known as: Liquefied petroleum gas
Industrial Uses
Fuel for kilns, canteens, heating, aerosol propellant, forklift fuel
STORAGE HAZARDS
Heavier than air β€” vapour pools in drains, pits; PESO licence for bulk storage; all connections to be leak-tested regularly
HANDLING HAZARDS
Cryogenic burns from liquid LPG contact; asphyxiant in confined space; explosive range 1.8–9.5%
PROCESS HAZARDS
Regulator/hose failure in canteen or kiln area; cylinder heating in summer sun β€” pressure relief discharge

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Cryogenic gloves for bulk liquid LPG handling
  2. Anti-static footwear
  3. Flame-resistant coverall
  4. LEL gas monitor in enclosed LPG-use areas

🚨 Emergency Procedure β€” Large Spill / Major Leak

1No ignition sources β€” do NOT switch on/off electrical equipment
2Shut off cylinder valve; evacuate area
3Water spray to cool cylinder if exposed to fire
4BLEVE risk from fire on LPG vessel β€” evacuate 300m, call fire brigade
5Ventilate enclosed area before re-entry with LEL monitor
Hydrogen (Hβ‚‚)
Also known as: Electrolytic / industrial hydrogen
Industrial Uses
Hydrogenation plants, refineries, metal heat treatment, welding
STORAGE HAZARDS
Lightest gas β€” accumulates at ceiling; embrittles carbon steel; store cylinders upright in ventilated outdoor cage
HANDLING HAZARDS
Colourless, odourless, tasteless β€” no sensory warning; explosive range 4–75%; invisible flame in daylight
PROCESS HAZARDS
Diffuses through many materials; high-pressure leaks auto-ignite; back-flow into cylinder catastrophic

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. No synthetic clothing (static spark risk)
  2. SCBA for any leak response
  3. Anti-static footwear
  4. Flame-resistant cotton coverall

🚨 Emergency Procedure β€” Large Spill / Major Leak

1Do not extinguish Hβ‚‚ fire unless source shut off β€” explosion on re-ignition
2Shut supply valve if safe
3Ventilate from top; no water jet
4PESO notification; evacuate 150m for large cylinder leak
Formaldehyde (HCHO)
Also known as: Formalin (37% solution) / methanal
Industrial Uses
Resins, textile finishing, preservatives (labs, hospitals), disinfection, particle board
STORAGE HAZARDS
Flash point 64Β°C; polymerises without inhibitor; store cool in PE containers away from oxidisers; 37% formalin solution more common
HANDLING HAZARDS
IARC Group 1 carcinogen; potent respiratory and skin sensitiser; STEL 0.3 ppm; eye/nose/throat irritation at very low conc.
PROCESS HAZARDS
Heating concentrated solutions releases high conc. vapour rapidly; in textile finishing baths β€” vapour exposure during hot curing

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Chemical splash goggles
  2. Nitrile or butyl gloves
  3. OV respirator with formaldehyde-specific cartridge (NIOSH-approved)
  4. Full coverall to avoid skin sensitisation
  5. Local exhaust ventilation mandatory

🚨 Emergency Procedure β€” Large Spill / Major Leak

1Evacuate β€” formaldehyde vapour is a carcinogen and sensitiser
2SCBA for spill response
3Absorb spill with dry sand; neutralise with 10% ammonia solution
4Skin/eye: flush 20 min water; hospitalise
5Workers: annual biological monitoring (urine formic acid)
Styrene Monomer (Cβ‚ˆHβ‚ˆ)
Also known as: Vinylbenzene / ethenylbenzene
Industrial Uses
FRP (fibre-reinforced plastic) manufacture, polystyrene, resins, coatings
STORAGE HAZARDS
Flash point 31Β°C; can polymerise explosively without inhibitor if heated; store cool with inhibitor (p-TBC); away from peroxides
HANDLING HAZARDS
Possible carcinogen (IARC 2A); narcotic; TLV 20 ppm; absorbed through skin; reproductive hazard at high exposure
PROCESS HAZARDS
In FRP lay-up/spray rooms: vapour builds rapidly β€” LEL monitoring essential; heating causes rapid polymerisation and pressure rise in drums

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Supplied air or OV respirator with organic vapour cartridge
  2. Nitrile gloves (change frequently)
  3. Chemical goggles
  4. Anti-static clothing
  5. LEL monitor mandatory in FRP spray booths

🚨 Emergency Procedure β€” Large Spill / Major Leak

1COβ‚‚ or foam for fire
2Evacuate spray area; ventilate
3Absorb spill with dry sand; no sewers
4SCBA for large spill response
5Biological monitoring: mandelic acid in urine for exposed workers
Naphtha (Light / Heavy)
Also known as: Petroleum naphtha / VM&P naphtha
Industrial Uses
Solvent in paints, adhesives, cleaning, rubber cement, dry cleaning, petrochemical feedstock
STORAGE HAZARDS
Flash point: light naphtha <21Β°C, heavy naphtha 21–60Β°C; store earthed in cool flammable store; vapour heavier than air
HANDLING HAZARDS
Contains aromatic hydrocarbons including benzene; CNS depressant; skin defatting; chronic exposure liver/kidney and bone marrow risk
PROCESS HAZARDS
High evaporation rate; static in pumping operations; vapour accumulation in enclosed coating/adhesive application areas

πŸ›‘οΈ Required PPE β€” Specific Grades & Types

  1. Anti-static coverall and footwear
  2. Nitrile gloves (change frequently)
  3. OV respirator for enclosed use
  4. Chemical goggles
  5. Supplied air for tank entry

🚨 Emergency Procedure β€” Large Spill / Major Leak

1Foam or COβ‚‚ for fire β€” no water jet
2Eliminate all ignition sources before entry
3Earthing mandatory during pumping
4Absorb spill with dry sand; no drains
5Benzene monitoring for chronic exposure workers