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POTASSIUM CYANIDEICSC: 0671
July 2003
CAS #: 151-50-8Hydrocyanic acid, potassium salt
UN #: 1680
EINECS #: 205-792-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION 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.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 

 PREVENT DISPERSION OF DUST! STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Sore throat. Headache. Confusion. Weakness. Shortness of breath. Convulsions. Unconsciousness.  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 CLASSIFICATION & 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 sodium hypochlorite solution. Then wash away with plenty of water. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: I 

STORAGE
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. 
PACKAGING
Airtight.
Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs.
Marine pollutant. 
POTASSIUM CYANIDE ICSC: 0671
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: KCN
Molecular mass: 65.1
Boiling point: 1625°C
Melting point: 634°C
Density: 1.52 g/cm³
Solubility in water, g/100ml: 71.6  


EXPOSURE & HEALTH EFFECTS

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

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. 

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

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


Occupational exposure limits
TLV: 5 (ceiling ) mg/m3 as STEL; (skin).
MAK: (as CN): 5.0 mg/m3; peak limitation category: II(1); skin absorption (H); pregnancy risk group: C.
EU-OEL: 1 mg/m3 as TWA; 5 mg/m3 as STEL; (skin) 

ENVIRONMENT
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. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T+, N; R: 26/27/28-32-50/53; S: (1/2)-7-28-29-45-60-61; Note: A 

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       Toxicological Abbreviations