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Hydrogen Sulfide
H2S
CAS#: 7783-06-4
| HYDROGEN SULFIDE |
ICSC: 0165 |
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Date of Peer Review: October 2002
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Sulfur hydride
(cylinder) |
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| CAS # |
7783-06-4 |
H2S |
| RTECS # |
MX1225000 |
Molecular mass: 34.1 |
| UN # |
1053 |
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| EC # |
016-001-00-4 |
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| TYPES OF HAZARD / EXPOSURE |
ACUTE HAZARDS / SYMPTOMS |
PREVENTION |
FIRST AID / FIRE FIGHTING |
| FIRE |
Extremely flammable.
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NO open flames, NO sparks, and NO smoking.
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Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with water spray, powder, carbon dioxide.
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| EXPLOSION |
Gas/air mixtures are explosive.
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Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. Do NOT use compressed air for filling, discharging, or handling.
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In case of fire: keep cylinder cool by spraying with water.
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| EXPOSURE |
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AVOID ALL CONTACT!
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IN ALL CASES CONSULT A DOCTOR!
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| Inhalation |
Headache. Dizziness. Cough. Sore throat. Nausea. Laboured breathing. Unconsciousness. Symptoms may be delayed (see Notes).
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest. Half-upright position. Artificial respiration may be needed. No mouth-to-mouth artificial respiration. Refer for medical attention.
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| Skin |
ON CONTACT WITH LIQUID: FROSTBITE.
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Cold-insulating gloves.
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ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.
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| Eyes |
Redness. Pain. Severe deep burns.
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Safety goggles, 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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Do not eat, drink, or smoke during work.
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| SPILLAGE DISPOSAL |
PACKAGING & LABELLING |
Evacuate danger area! Consult an expert! Remove all ignition sources. Ventilation. Remove gas with fine water spray. Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus.
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EU Classification
Symbol: F+, T+, N
R: 12-26-50
S: (1/2-)-9-16-36-38-45-61
UN Classification
UN Hazard Class: 2.3
UN Subsidiary Risks: 2.1
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| EMERGENCY RESPONSE |
SAFE STORAGE |
Transport Emergency Card: TEC (R)-20G2TF or 20S1053
NFPA Code: H4; F4; R0;
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Fireproof. Separated from strong oxidants. Cool. Keep in a well-ventilated room. Install continous monitoring system with alarm.
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IPCS
International
Programme on
Chemical Safety |
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Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities � IPCS, CEC 2004
SEE IMPORTANT INFORMATION ON BACK |
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| HYDROGEN SULFIDE |
ICSC: 0165 |
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| IMPORTANT DATA |
PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS, WITH CHARACTERISTIC ODOUR OF ROTTEN EGGS.
PHYSICAL DANGERS:
The gas is heavier than air and may travel along the ground; distant ignition possible. As a result of flow, agitation, etc., electrostatic charges can be generated.
CHEMICAL DANGERS:
Heating may cause violent combustion or explosion. The substance decomposes on burning producing toxic gases (sulfur oxides). Reacts violently with strong oxidants, causing fire and explosion hazard. Attacks many metals and some plastics.
OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 ppm as TWA; 15 ppm as STEL; (ACGIH 2004).
MAK: 10 ppm, 14 mg/m3; Peak limitation category: II(2); Pregnancy risk group: IIc; (DFG 2004).
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ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.
INHALATION RISK:
A harmful concentration of this gas in the air will be reached very quickly on loss of containment.
EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes and the respiratory tract. The substance may cause effects on the central nervous system. Exposure may result in unconsciousness. Exposure may result in death. Inhalation of gas may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated. Rapid evaporation of the liquid may cause frostbite.
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| PHYSICAL PROPERTIES |
Boiling point: -60℃
Melting point: -85℃
Solubility in water, g/100 ml at 20℃: 0.5
Relative vapour density (air = 1): 1.19
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Flash point: Flammable Gas
Auto-ignition temperature: 260℃
Explosive limits, vol% in air: 4.3-46
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| ENVIRONMENTAL DATA |
The substance is very toxic to aquatic organisms.
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| NOTES |
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. The substance blocks the sense of smell. The odour warning when the exposure limit value is exceeded is insufficient.
Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency Response.
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| ADDITIONAL INFORMATION |
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| LEGAL NOTICE |
Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information |
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| � IPCS, CEC 2004 |
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Xianxi,Dali,Nanhai district,Foshan city,Guangdong province,China
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