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The NFPA Diamond

  1. Expand All Compress All
  2. The NFPA Diamond

  3. The NFPA diamond is designed to give general hazard information for chemicals. Click on the hazards/colors for the specific hazards represented by the numbers.
  4. Red: Fire Hazard

    1. 0 Will not burn
    2. 1 Must be preheated for ignition; flashpoint above 200F (93C)
    3. 2 Must be moderately heated for ignition, flashpoint above 100F (38C)
    4. 3 Ignition may occur under most ambient conditions, flashpoint below 100F (38C)
    5. 4 Extremely flammable and will readily disperse through air under standard conditions, flashpoint below 73F (23C)
  5. Blue: Health Hazard

    1. 0 Hazard no greater than ordinary material
    2. 1 May cause irritation; minimal residual injury
    3. 2 Intense or prolonged exposure may cause incapacitation; residual injury may occur if not treated
    4. 3 Exposure could cause serious injury even if treated
    5. 4 Exposure may cause death
  6. Yellow: Reactivity Hazard

    1. 0 Stable
    2. 1 May become unstable at elevated temperatures and pressures, may be mildly water reactive
    3. 2 Unstable; may undergo violent decomposition, but will not detonate. May form explosive mixtures with water
    4. 3 Detonates with strong ignition source
    5. 4 Readily detonates
  7. White: Special Hazard

    1. OX Strong Oxidizer
    2. water reactive
  8. Other Symbols Commonly Seen (these are not official NFPA symbols)

    1. ACID - Indicates an acid
    2. ALK - Indicates an alkali or base
    3. COR - Indicates the chemical is corrosive
    4. radioactive
    5. corrosive
    6. poison
    7. flammable solid
    8. oxidizer
    9. biohazard
    10. irritant
    11. flammable gas or liquid
    12. dangerous when wet
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