Hydrogen cyanide

CAS RN: 74-90-8

Cleanup Methods

1. Remove all ignition sources. 2. Ventilate area of spill or leak. 3. If in gaseous form, stop flow of gas. If source of leak is cylinder & leak cannot be stopped in place, remove ... to safe place in open air ... repair leak or allow cylinder to empty.
Evacuate danger area immediately! Consult an expert! Ventilation. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. NEVER direct water jet on liquid. Prevent from entering confined spaces. Do NOT let this chemical enter the environment. Extra personal protection: gas-tight chemical protection suit including self-contained breathing apparatus.
Releases may require isolation or evacuation. Eliminate all ignition sources. Stop or control the leak, if this can be done without undue risk. Use vapor-suppressing foam to blanket release.
Environmental considerations - land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. /Hydrogen cyanide, aqueous solution; Hydrogen cyanide, solution in alcohol; Hydrogen cyanide, stabilized (with less than 3% water); Hydrogen cyanide, stabilized (with less than 3% water absorbed in a porous material)/
Environmental considerations - water spill: Use natural barriers or oil spill control booms to limit spill travel. Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). /Hydrogen cyanide, solution in alcohol; Hydrogen cyanide, stabilized (with less than 3% water); Hydrogen cyanide, stabilized (with less than 3% water absorbed in a porous material)/
Environmental considerations - water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). /Hydrogen cyanide, aqueous solution/
Environmental considerations - air spill: Apply water spray or mist to knock down vapors. Vapor knockdown water is corrosive or toxic and should be diked for containment. /Hydrogen cyanide, aqueous solution; Hydrogen cyanide, solution in alcohol; Hydrogen cyanide, stabilized (with less than 3% water); Hydrogen cyanide, stabilized (with less than 3% water absorbed in a porous material)/
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