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AMMONIUM BISULFIDEICSC: 1035
September 2002
CAS #: 12124-99-1Ammonium hydrogen sulfide
Ammonium hydrosulfide
Ammonium sulfhydrate
Ammonium mercaptan
EINECS #: 235-184-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Many reactions may cause fire or explosion. Gives off irritating or toxic fumes (or gases) in a fire.    NO open flames.    Use foam, powder, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Laboured breathing. Shortness of breath. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain.  Wear face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal cramps. Abdominal pain. Burning sensation in the mouth. Diarrhoea. Nausea. Vomiting.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Ventilation. Remove all ignition sources. Sweep spilled substance into covered air-tight containers. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
Separated from acids, oxidants and food and feedstuffs. Cool. Dry. Well closed. Keep in a well-ventilated room. 
PACKAGING
Airtight.
Do not transport with food and feedstuffs. 
AMMONIUM BISULFIDE ICSC: 1035
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
HYGROSCOPIC WHITE-TO-YELLOW CRYSTALS WITH CHARACTERISTIC ODOUR. 

Physical dangers
No data. 

Chemical dangers
On combustion, forms ammonia fumes, nitrogen oxides and sulfur oxides. Decomposes at room temperature. This produces toxic and corrosive gases including ammonia and hydrogen sulfide. Reacts with acids. This produces hydrogen sulfide and sulfur oxides. Reacts violently with oxidants. This generates fire or explosion hazard. 

Formula: H5NS / (NH4)HS
Molecular mass: 51.1
Solubility in water, g/100ml: 128.1
Vapour pressure, kPa at 22°C: 52
Flash point: see Notes 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body through the skin, by inhalation and by ingestion. 

Effects of short-term exposure
The substance is severely irritating to the eyes, skin and respiratory tract. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
 

ENVIRONMENT
This substance may be hazardous to the environment. Special attention should be given to aquatic organisms. 

NOTES
The commercial product is available as a 40% solution that is more stable than the dry product.
UN number for the solution is 2683.
The substance is combustible but no flash point is available in literature.
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations