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THIOCYANIC ACID
ICSC: 1671
Peer-Review Status: 12.10.2006 Validated
Hydrogen rhodanide 
CAS #: 463-56-9 EC #: 615-003-00-8
EINECS #: 207-337-4
    Formula: HSCN
Molecular mass: 59.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO contact with acids, bases or oxidizing agents.  In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE See Notes.     
Inhalation   Use ventilation, local exhaust or breathing protection.  Fresh air, rest. 
Skin   Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes   Wear safety spectacles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: filter respirator for acid gases and vapours adapted to the airborne concentration of the substance. Collect leaking and spilled liquid in covered containers as far as possible. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: Xn; R: 20/21/22-32-52/53; S: (2)-13-61 
UN Classification
 
GHS Classification
Signal: Warning
Harmful if swallowed
May cause damage to thyroid through prolonged or repeated exposure 
excl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong oxidants, strong bases and food and feedstuffs. Ventilation along the floor. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
The vapour is heavier than air. 

Chemical dangers
The substance polymerizes due to warming. Decomposes on heating. This produces toxic fumes. Reacts violently with strong bases and strong oxidants. This produces toxic fumes including hydrogen cyanide. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour and by ingestion. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of short-term exposure
See Notes. 

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


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Melting point: 5°C
Solubility in water: good
Relative vapour density (air = 1): 2.0
Octanol/water partition coefficient as log Pow: 0.58 (estimated) 
 

NOTES
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. 

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