⚠ DANGER: OSHA IDLH is 50 ppm. LC50 (rat) ~120 ppm. Inhibits cellular oxygen use causing rapid incapacitation. Smell of bitter almonds is not reliable — 40% of people cannot detect it. Antidote (hydroxocobalamin/amyl nitrite) must be immediately available.
GHS Hazard Pictograms
🔥 Flammable☠ Acutely Toxic❤️ Health Hazard🌊 Environmental
Hazard Statements (H-codes)
H225 – Highly flammable liquid and vapour (HCN)
H290 – May be corrosive to metals
H300+H310+H330 – Fatal if swallowed, skin contact, or inhaled
H400 – Very toxic to aquatic life
H410 – Very toxic with long lasting effects
Precautionary Statements (P-codes)
P260 – Do not breathe vapour
P264 – Wash hands thoroughly after use
P270 – Do not eat/drink/smoke when using
P271 – Use only outdoors or in well-ventilated area
P301+P310 – IF SWALLOWED: Immediately call Poison Control
First Aid Measures (Section 4)
👁Eye Contact▼
Flush with water while evacuating others — do not become a victim. Call 911.
🖐Skin Contact▼
Flush with water. Remove contaminated clothing while wearing gloves. Seek emergency care.
🫁Inhalation▼
MEDICAL EMERGENCY — call 911 immediately. Administer antidote kit (hydroxocobalamin or amyl nitrite/sodium nitrite/sodium thiosulfate) if trained. Do not perform mouth-to-mouth without barrier.
🫦Ingestion▼
Call 911 and Poison Control (1-800-222-1222) immediately. Administer antidote if trained.