Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Sodium bisulfide(16721-80-5)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Sodium bisulfide
Synonyms
Sodium bisulfide
Sodium mercaptan
Sodium mercaptide
Sodium sulfanide
Sodium sulfhydrate
CAS
16721-80-5
Formula
HNaS
Molecular Weight
56.06
EINECS
240-778-0
RTECS
WE1900000
RTECS Class
Mutagen
Merck
12,8730
Beilstein/Gmelin
19160 (G)

Physical and Chemical Properties

Appearance
Yellow-pink or white crystals, flakes or lumps.
Solubility in water
Soluble
Melting Point
350
Vapor Pressure
49 (25 C)
Density
1.79 g/cm3
Usage
Prodn of heavy water for nuclear reactors.
Odor threshold
0.0047 ppm

First Aid Measures

Ingestion
Hydrogen sulfide is a gas at room temperature (harbison, 1998), making ingestion unlikely.
Ingestion
Nausea and vomiting may be noted. Weight loss can be seen with chronic exposure.
Inhalation
Respiratory depression, cyanosis, pulmonary edema, bronchitis, and dyspnea may be noted following exposure to non-fatal concentrations.
Inhalation
Immediately move patient to fresh air and administer 100 percent oxygen. Prevent self-exposure and possible death by wearing a self-contained breathing apparatus to rescue the victim.
Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
Skin
Skin exposure may result in severe pain, itching, and erythema, especially in moist areas. Cyanosis may be noted following severe exposure.
Eyes
See Skin.
Eyes
In case of contact with substance, immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage
Keep containers tightly closed in a well ventilated area away from food products. Keep away from heat and water. Store at temperatures above 63 degrees F.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Inhalation
Respiratory depression, cyanosis, pulmonary edema, bronchitis, and dyspnea may be noted following exposure to non-fatal concentrations.
Skin
Skin exposure may result in severe pain, itching, and erythema, especially in moist areas. Cyanosis may be noted following severe exposure.
Eyes
See Skin.
Ingestion
Nausea and vomiting may be noted. Weight loss can be seen with chronic exposure.
Hazards
Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
UN (DOT)
2922
UN (DOT)
2923, 2949

Exposure Controls/Personal Protection

Personal Protection
Rubber protective equipment, such as apron, boots, splash-proof goggles, gloves; canister-type respirator or self-contained breathing apparatus.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Exposure Effects
Patients may acutely present with low heart rate, rapid heart rate, hyperventilation, respiratory depression even to the point of apnea, and/or hypo-/elevated blood pressure. Asphyxial seizures, coma, and death associated with rapid respiratory paralysis may be noted following exposure to high concentrations. Headache, sweating, vertigo, anosmia, irritability, staggering gait, disorientation, somnolence, weakness, confusion, and delirium may be noted following exposure to non-fatal levels. Spontaneous abortions have occurred after exposure to life-threatening concentrations.
Poison Class
2

Fire Fighting Measures

Flash Point
90
Fire Fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Apply water from as far a distance as possible.
Fire Potential
Flammable/combustible material.

Accidental Release Measures

Small spills/leaks
Keep material out of water sources and sewers. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Add soda ash (Na2CO3). Allow to aerate. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.

Stability and Reactivity

Incompatibilities
Reacts with acids rapidly and exothermically to release hydrogen sulfide Reacts violently with diazonium salts.
Stability
Readily hydrolyzed in moist air to sodium hydroxide and sodium sulfide.
Decomposition
Decomposes to hydrogen sulfide and free alkali. When heated to decomposition it emits toxic fumes of sulfoxides and na2o.
Combustion Products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Transport Information

UN Number
2922
UN Number
2923, 2949
Hazard Class
8
Packing Group
I
Packing Group
I; II; III
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