| Product Identification | Back to Contents | 【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 | Back to Contents | 【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 | Back to Contents | 【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 | Back to Contents | 【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 | Back to Contents | 【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 | Back to Contents | 【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 | Back to Contents | 【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 | Back to Contents | 【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 | Back to Contents | 【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. |
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