hydrogen sulfide
CAS No.: 7783-06-4
Synonyms:
Formula: H2S
Exact Mass: 33.98770
Molecular Weight: 34.08090
PSA: 25.30000
LogP: 0.11280
hydrogen sulfide 7783-06-4 MSDS
Name: Hydrogen Sulfide Material Safety Data Sheet
Synonym: Suluretted hydrogen; Hepatic Gas; Hydrosulfuric acid
CAS: 7783-06-4
Section 1 - Chemical Product   MSDS Name:Hydrogen Sulfide Material Safety Data Sheet
Synonym:Suluretted hydrogen; Hepatic Gas; Hydrosulfuric acid

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
7783-06-4 Hydrogen sulfide ca. 100 231-977-3
Hazard Symbols: T+ F+ N
Risk Phrases: 12 26 50

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Extremely flammable. Very toxic by inhalation. Very toxic to aquatic organisms.The toxicological properties of this material have not been fully investigated.
Potential Health Effects
Eye:
May cause eye irritation. May cause chemical conjunctivitis and corneal damage.
Skin:
May cause skin irritation. May be absorbed through the skin.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Ingestion of large amounts may cause CNS depression.
Inhalation:
Toxic if inhaled. Aspiration may lead to pulmonary edema. Vapors may cause dizziness or suffocation. May cause burning sensation in the chest.
Chronic:
Repeated inhalation may cause chronic bronchitis. Effects may be delayed. Adverse reproductive effects have been reported in animals.

Section 4 - FIRST AID MEASURES
  Eyes: In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Get medical aid.
Skin:
In case of contact, flush skin with plenty of water. Remove contaminated clothing and shoes. Get medical aid if irritation develops and persists. Wash clothing before reuse.
Ingestion:
If swallowed, do not induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person. Get medical aid.
Inhalation:
Do NOT use mouth-to-mouth resuscitation. If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:
Treat symptomatically and supportively.

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Will be easily ignited by heat, sparks or flame. Extremely flammable gas.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. For large fires, use water spray, fog or regular foam. DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame. Avoid ingestion and inhalation. Use only in a chemical fume hood. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Handle cylinders with care. Protect cylinders from physical damage. Do not heat cylinders by any means to increase the product discharge rate. Use a check valve or trap in the discharge line to prevent backflows into the cylinders. Test atmosphere periodically for hydrogen sulfide. Do not rely on sense of smell.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Flammables-area. Containers should not be subjected to temperatures above 125F.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use only under a chemical fume hood. Use adequate general or local explosion-proof ventilation to keep airborne levels to acceptable levels.
Exposure Limits CAS# 7783-06-4: United Kingdom, WEL - TWA: 5 ppm TWA; 7 mg/m3 TWA United Kingdom, WEL - STEL: 10 ppm STEL; 14 mg/m3 STEL United States OSHA: ; 20 ppm Ceiling Belgium - TWA: 10 ppm VLE; 14 mg/m3 VLE Belgium - STEL: 15 ppm VLE; 21 mg/m3 VLE France - VME: 5 ppm VME; 7 mg/m3 VME France - VLE: 10 ppm VLE; 14 mg/m3 VLE Germany: 10 ppm TWA; 14 mg/m3 TWA Japan: 5 ppm OEL; 7 mg/m3 OEL Malaysia: 10 ppm TWA; 14 mg/m3 TWA Netherlands: 10 ppm MAC; 15 mg/m3 MAC Russia: 10 mg/m3 TWA Spain: 10 ppm VLA-ED; 14 mg/m3 VLA-ED Spain: 15 ppm VLA-EC; 21 mg/m3 VLA-EC Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Gas
Color: colorless
Odor: repulsive - rotten egg-like
pH: Not available.
Vapor Pressure: 394.0 psia @ 100 deg F
Viscosity: Not available.
Boiling Point: -75 deg F (-60 deg C)
Freezing/Melting Point: Not available.
Autoignition Temperature: Not available.
Flash Point: Not applicable.
Explosion Limits, lower: 4
Explosion Limits, upper: 44
Decomposition Temperature:
Solubility in water: Slightly soluble.
Specific Gravity/Density: 0.79 @ 60F
Molecular Formula: H2S
Molecular Weight: 34.074

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable at room temperature in closed containers under normal storage and handling conditions.
Conditions to Avoid:
Ignition sources, excess heat.
Incompatibilities with Other Materials:
Strong oxidizing agents, Vapors will combust spontaneously when mixed with chlorine, nitrogen trifluoride, or oxygen trifluoride vapors., fluorine.
Hazardous Decomposition Products:
Sulfur oxides (SOx), including sulfur oxide and sulfur dioxide.
Hazardous Polymerization: Not available.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 7783-06-4: MX1225000 LD50/LC50:
CAS# 7783-06-4: Inhalation, mouse: LC50 = 634 ppm/1H; Inhalation, mouse: LC50 = 1200 mg/m3/2H; Inhalation, rat: LC50 = 444 ppm.
Carcinogenicity:
Hydrogen sulfide - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
 

Section 13 - DISPOSAL CONSIDERATIONS
  Products which are considered hazardous for supply are classified as Special Waste and the disposal of such chemicals is covered by regulations which may vary according to location. Contact a specialist disposal company or the local waste regulator for advice. Empty containers must be decontaminated before returning for recycling.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: HYDROGEN SULFIDE, LIQUEFIED
Hazard Class: 2.3
UN Number: 1053
Packing Group:
IMO
Shipping Name: HYDROGEN SULFIDE, LIQUEFIED
Hazard Class: 2.3
UN Number: 1053
Packing Group:
RID/ADR
Shipping Name: HYDROGEN SULFIDE, LIQUEFIED
Hazard Class: 2.3
UN Number: 1053
Packing group:
USA RQ: CAS# 7783-06-4: 100 lb final RQ; 45.4 kg final RQ

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T+ F+ N
Risk Phrases:
R 12 Extremely flammable.
R 26 Very toxic by inhalation.
R 50 Very toxic to aquatic organisms.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 28 After contact with skin, wash immediately
with...
S 33 Take precautionary measures against static
discharges.
S 36/37 Wear suitable protective clothing and
gloves.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 7783-06-4: 2
Canada
CAS# 7783-06-4 is listed on Canada's DSL List.
CAS# 7783-06-4 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 7783-06-4 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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