- Sodium sulfhydrate
- Sodium bisulfide
- Sodium hydrogen sulfate
- Sodium mercaptan
- Sodium sulfhydrate
Yellow-pink or white crystals, flakes or lumps with a mild, rotten-egg odor.
Chemical reagent, production of heavy water for nuclear reactors.
Registry Numbers and Inventories.
R 31 34
S 25 36/37/38 45 50A
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Decomposition point, °C
Vapor pressure, mmHg
49 (20 C)
Odor Threshold Odor threshold 0.0047 ppm
Solubility in water
620 g/L (20 C)
Hazards and Protection.
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.
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.
Rubber protective equipment, such as apron, boots, splash-proof goggles, gloves; canister-type respirator or self-contained breathing apparatus.
Wear positive pressure self-contained breathing apparatus (SCBA).
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.
Readily hydrolyzed in moist air to sodium hydroxide and sodium sulfide.
Metals, acids and moisture.
Decomposes to hydrogen sulfide and free alkali. When heated to decomposition it emits toxic fumes of sulfoxides and Na2O.
Upper exp. limit, %
Lower exp. limit, %
wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out.
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.
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Effects may be delayed.
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause perforation of the digestive tract. May cause systemic effects.
Causes chemical burns to the respiratory tract. Aspiration may lead to pulmonary edema. Effects of inhalation may be delayed. May cause systemic effects.
Causes skin burns. Effects of contact may be delayed. May cause skin rash (in milder cases), and cold and clammy skin with cyanosis or pale color.
Causes eye burns. May cause chemical conjunctivitis and corneal damage.
If swallowed, do NOT induce vomiting. Get medical aid immediately. If victim is fully conscious, give a cupful of water. Never give anything by mouth to an unconscious person.
If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid immediately. Wash clothing before reuse.
In case of contact, immediately flush eyes with plenty of water for a t least 15 minutes. Get medical aid immediately.