Product Identification

Product Name

Sodium sulfide

Synonyms

Disodium sulfide
Sodium sulfuret

CAS

1313-82-2

Formula

Na2S

Molecular Weight

78.03

EINECS

215-211-5

RTECS

WE1905000

RTECS Class

Other

Merck

12,8830

Beilstein/Gmelin

9346 (G)

EC Index Number

016-009-00-8

EC Class

Contact with acids liberates toxic gas; Corrosive; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Yellow-pink or white deliquescent crystals, flakes or lumps. Alkaline.

Solubility in water

150 g/L

Boiling Point

174

Density

1.856 g/cm3 (14 C)

Heat Of Vaporization

Usage

In prodn of heavy water for nuclear reactors.

First Aid Measures

Ingestion

Give water; induce vomiting; call a doctor.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes.

Eyes

In case of contact with substance, immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage

Protect against physical damage. Separate from acids, oxidizing materials, and possible sources of ignition.

Handling

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.

Hazards Identification

Inhalation

Stridor, dyspnea, upper airway injury, and pulmonary edema, especially following inhalation of vaporized caustics, may occur.

Skin

Severe skin irritation and/or burns may occur.

Eyes

See Skin.

Ingestion

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.

Hazards

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.

UN (DOT)

1385

Exposure Controls/Personal Protection

Personal Protection

Goggles or face shield. Wear special protective clothing and positive pressure 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.

Fire Fighting Measures

Fire Fighting

Flood with water.

Fire Potential

May burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks

Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard.

Stability and Reactivity

Incompatibilities

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.

Stability

Unstable - can explode with shock or heat reactive at high temperature or pressure.

Decomposition

When heated to decomposition, emits toxic fumes of sulfur oxides and disodium oxide.

Combustion Products

Irritating sulfur dioxide is produced in fire.

Transport Information

UN Number

1385

Hazard Class

4.2

Packing Group

II