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HYDROGEN IODIDE
ICSC: 1326
Peer-Review Status: 04.05.2010 Validated
Anhydrous hydriodic acid 
CAS #: 10034-85-2 RTECS #: MX1510000
UN #: 2197
EC #: 053-002-00-9
EINECS #: 233-109-9
 		    Formula: HI
Molecular mass: 127.9

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.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION     In case of fire: keep cylinder cool by spraying with water. 
 
EXPOSURE   AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Cough. Sore throat. Burning sensation behind the breastbone. Shortness of breath. Laboured breathing.  Use ventilation, local exhaust or breathing protection.  Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention. 
Skin Redness. Pain. Skin burns. Blisters. ON CONTACT WITH LIQUID: FROSTBITE.  Protective gloves. Cold-insulating gloves. Protective clothing.  Rinse skin with plenty of water or shower for at least 15 minutes. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer immediately for medical attention. 
Eyes Redness. Pain. Severe burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.   

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation.   
EC Classification
Symbol: C; R: 35; S: (1/2)-9-26-36/37/39-45; Note: 5 
UN Classification
UN Hazard Class: 2.3; UN Subsidiary Risks: 8 
GHS Classification
Signal: Danger
Contains gas under pressure; may explode if heated
Causes severe skin burns and eye damage
May cause respiratory irritation 
cylinder;gascorr

EMERGENCY RESPONSE SAFE STORAGE
  Fireproof if in building. Separated from metals and oxidants. Keep in a well-ventilated room. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS COMPRESSED LIQUEFIED GAS WITH PUNGENT ODOUR. 

Physical dangers
The gas is heavier than air. 

Chemical dangers
Reacts with oxidants. This generates fire hazard. Attacks many metals. This produces flammable/explosive gas (hydrogen - see ICSC 0001). The solution in water is a strong acid. It reacts violently with bases and is corrosive. 

Occupational exposure limits
TLV not established.
MAK (not established):. 

Routes of exposure
Serious local effects by all routes of exposure. 

Inhalation risk
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly. 

Effects of short-term exposure
Rapid evaporation of the liquid may cause frostbite. The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause severe swelling of the throat. Inhalation may cause lung oedema, but only after initial corrosive effects on eyes and/or airways have become manifest. Medical observation is indicated. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: -35.5°C
Melting point: -50.8°C
Solubility in water, g/100ml at 20°C: 42 (good)
Vapour pressure, kPa at ?°C: 733
Relative vapour density (air = 1): 4.4   		 

NOTES
Other UN number : 1787 Hydriodic acid, hazard class 8, packing group II-III.
The CAS number 10034-85-2 applies for hydrogen iodide and hydriodic acid. 

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
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    See Also:
       Toxicological Abbreviations