Ammonium hydrogen sulfide
Ammonium hydrosulfide
Ammonium sulfhydrate
Ammonium mercaptan
H5NS / (NH4)HS
Molecular mass: 51.1
ICSC # 1035
CAS # 12124-99-1
RTECS # BS4900000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
Many reactions may cause fire or explosion.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Foam,
powder or carbon dioxide.
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Explosion
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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STRICT HYGIENE!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Cough.
Laboured breathing.
Shortness of breath.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
Pain.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Face shield,
or eye protection in combination with breathing protection.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal cramps.
Abdominal pain.
Burning sensation in the mouth.
Diarrhoea.
Nausea.
Vomiting.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Evacuate danger area!
Consult an expert!
Ventilation.
Remove all ignition sources.
Sweep spilled substance into air tight containers.
Chemical protection suit including self-contained breathing apparatus.
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Separated from
acids,
oxidants
,
food and feedstuffs
.
Cool.
Dry.
Well closed.
Keep in a well-ventilated room.
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Airtight.
Do not transport with food and feedstuffs.
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Important Data
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Physical State; Appearance:
HYGROSCOPIC
,
WHITE
TO YELLOW
CRYSTALS
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
Chemical Dangers:
On combustion, forms ammonia fumes, nitrogen oxides and sulfur oxides.
The substance decomposes at room temperature
producing
toxic and corrosive gases
including
ammonia
and
hydrogen sulfide
.
Reacts
with
acids
producing
hydrogen sulfide
and
sulfur oxides
.
Reacts violently with oxidants causing fire and explosion hazard.
Occupational Exposure Limits:
TLV not established.
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Routes of Exposure:
The substance can be absorbed into the body
through the skin,
by inhalation
and
by ingestion.
Inhalation Risk:
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
is severely irritating to
the eyes
,
the skin
and
the respiratory tract
.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Solubility in water, g/100 ml: 128.1
Vapour pressure, kPa at 22°C: 52
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Flash point: See Notes
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Environmental
Data
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This substance may be hazardous in the environment; special attention should be given to aquatic organisms.
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N O T E S
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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.
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ADDITIONAL INFORMATION
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ICSC: 1035
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AMMONIUM BISULFIDE
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(C) IPCS, CEC, 1994
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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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