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POTASSIUM CYANIDE
ICSC: 0671
Peer-Review Status: 05.07.2003 Validated
Hydrocyanic acid, potassium salt 
CAS #: 151-50-8 RTECS #: TS8750000
UN #: 1680
EC #: 006-007-00-5
EINECS #: 205-792-3
    Formula: KCN
Molecular mass: 65.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible but forms flammable gas on contact with water or damp air. Gives off irritating or toxic fumes (or gases) in a fire.    NO hydrous agents. NO water. NO carbon dioxide. In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION     In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 
 
EXPOSURE   PREVENT DISPERSION OF DUST! STRICT HYGIENE!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Sore throat. Headache. Confusion. Weakness. Shortness of breath. Convulsions. Unconciousness.  Use local exhaust or breathing protection.  Fresh air, rest. No mouth-to-mouth artificial respiration. Administration of oxygen may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness. Pain. Further see Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Further see Inhalation.  Wear safety goggles, face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Burning sensation. Nausea. Vomiting. Diarrhoea. See Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Wear protective gloves when inducing vomiting. NO mouth-to-mouth artificial respiration. Administration of oxygen may be needed. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Ventilation. Sweep spilled substance into covered dry, sealable, labelled containers. Cautiously neutralize remainder with with sodium hypochlorite solution. Then wash away with plenty of water.  Airtight.
Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs.
Marine pollutant. 
EC Classification
Symbol: T+, N; R: 26/27/28-32-50/53; S: (1/2)-7-28-29-45-60-61; Note: A 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61S1680.
NFPA Code: H3; F0; R0. 
Separated from strong oxidants, acids, food and feedstuffs, carbon dioxide and products containing water. Dry. Well closed. Keep in a well-ventilated room. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
HYGROSCOPIC CRYSTALS OR SOLID IN VARIOUS FORMS WITH CHARACTERISTIC ODOUR. ODOURLESS WHEN DRY. 

Physical dangers
 

Chemical dangers
Decomposes rapidly on contact with acids. Decomposes slowly on contact with water, moisture or carbon dioxide. This produces hydrogen cyanide (see ICSC 0492). The solution in water is a medium strong base. 

Occupational exposure limits
TLV (as CN): 5mg/m³ (ceiling value); (skin); (ACGIH 2005).
MAK (inhalable fraction): 2 mg/m³; Peak limitation category: II(1); Pregnancy risk group: C; Skin absorption (H); (DFG 2004). 

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of short-term exposure
The substance is severely irritating to the eyes, skin and respiratory tract. The substance may cause effects on the cellular respiration. This may result in convulsions and unconsciousness. Exposure could cause death. Medical observation is indicated. See Notes. 

Effects of long-term or repeated exposure
The substance may have effects on the thyroid. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 1625°C
Melting point: 634°C
Density: 1.52 g/cm³
Solubility in water, g/100ml: 71.6  
The substance is very toxic to aquatic organisms. 

NOTES
The occupational exposure limit value should not be exceeded during any part of the working exposure.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Depending on the degree of exposure, periodic medical examination is suggested.
Do NOT take working clothes home.
Never work alone in an area if hydrogen cyanide exposure is possible.
The cards has been partly updated in April 2005.
See sections Environmental Data, Occupational Exposure Limits. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations