ICSC 1671 - THIOCYANIC ACID

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THIOCYANIC ACID	ICSC: 1671 (October 2006)
Hydrogen rhodanide

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 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)

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.

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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