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THIOCYANIC ACID

ICSC: 1671

Hydrogen rhodanide
HSCN
Molecular mass: 59.1
ICSC # 1671 		CAS # 463-56-9
EC # 615-003-00-8
October 12, 2006 Validated

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 acid(s), base(s), oxidants.
In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION


EXPOSURE See NOTES.


•INHALATION
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
Safety spectacles
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•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

STORAGE

PACKAGING & LABELLING

Personal protection: filter respirator for acid gases. Collect leaking liquid in covered containers. Carefully collect remainder, then remove to safe place.
Separated from strong oxidants, strong bases, food and feedstuffs Ventilation along the floor.
Do not transport with food and feedstuffs.
Xn symbol
R: 20/21/22-32-52/53
S: 2-13-61
Signal: Warning
Excl mark-Health haz
Harmful if swallowed
May cause damage to thyroid through prolonged or repeated exposure
ICSC: 1671 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

THIOCYANIC ACID

ICSC: 1671

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID .

PHYSICAL DANGERS:
The vapour is heavier than air

CHEMICAL DANGERS:
The substance polymerizes due to warming. The substance decomposes on heating producing toxic fumes. Reacts violently with strong bases and strong oxidants producing toxic fumes including hydrogen cyanide .

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK 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 in which a harmful concentration in the air is reached on evaporation of this substance 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 , resulting in hypothyroidism.

PHYSICAL
PROPERTIES

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)

ENVIRONMENTAL
DATA


N O T E S

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

ADDITIONAL INFORMATION



ICSC: 1671 THIOCYANIC ACID
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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