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THIOCYANIC ACIDICSC: 1671
Hydrogen rhodanideOctober 2006
CAS #: 463-56-9
EC Number: 207-337-4

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION 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.   

See Notes.   
  SYMPTOMS PREVENTION FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

excl mark;warncancer;health haz
WARNING
Harmful if swallowed
May cause damage to thyroid through prolonged or repeated exposure 

Transportation
UN Classification
 

STORAGE
Separated from strong oxidants, strong bases and food and feedstuffs. Ventilation along the floor. 
PACKAGING
Do not transport with food and feedstuffs. 
THIOCYANIC ACID ICSC: 1671
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: HSCN
Molecular mass: 59.1
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) 


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
See Notes. 

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


OCCUPATIONAL EXPOSURE LIMITS
 

ENVIRONMENT
 

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

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 20/21/22-32-52/53; S: (2)-13-61 

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    See Also:
       Toxicological Abbreviations