Sodium sulfide, anhydrous
- Disodium sulfide
Yellow-pink or white deliquescent crystals, flakes or lumps. Alkaline.
In prodn of heavy water for nuclear reactors.
Registry Numbers and Inventories.
EC Index Number
Contact with acids liberates toxic gas; Corrosive; Dangerous for the Environment
Japan ENCS (MITI)
Boiling point, °C
1.856 g/cm3 (14 C)
Solubility in water
Heat of fusion
Hazards and Protection.
Protect against physical damage. Separate from acids, oxidizing materials, and possible sources of ignition.
Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed.
Goggles or face shield. Wear special protective clothing and positive pressure self-contained breathing apparatus.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard.
Unstable - can explode with shock or heat reactive at high temperature or pressure.
Liberates toxic hydrogen sulfide on contact with acids. Reacts violently with carbon; diazonium salts; n,n-dichloromethylamine; 0-nitroaniline diazonium salt; water. Reacts with acid more vigorously, producing corrosive solutions and hydrogen sulfide.
When heated to decomposition, emits toxic fumes of sulfur oxides and disodium oxide.
Flood with water.
May burn but does not ignite readily.
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Irritating sulfur dioxide is produced in fire.
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.
Burns of the esophagus and less commonly the stomach may occur after caustic ingestion; the absence of oral mucosal injury does not reliably exclude esophageal burns. Patients with stridor, drooling or vomiting are more likely to have esophageal burns.
Stridor, dyspnea, upper airway injury, and pulmonary edema, especially following inhalation of vaporized caustics, may occur.
Severe skin irritation and/or burns may occur.
Give water; induce vomiting; call a doctor.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes.
In case of contact with substance, immediately flush with running water for at least 20 minutes.