Sodium sulfide, anhydrous

  • Disodium sulfide
Formula
Na2S
Structure
Description
Yellow-pink or white deliquescent crystals, flakes or lumps. Alkaline.
Uses
In prodn of heavy water for nuclear reactors.

Registry Numbers and Inventories.
CAS
1313-82-2
EC (EINECS/ELINCS)
215-211-5
EC Index Number
016-009-00-8
EC Class
Contact with acids liberates toxic gas; Corrosive; Dangerous for the Environment
RTECS
WE1905000
RTECS class
Other
UN (DOT)
1385
Merck
12,8830
Beilstein/Gmelin
9346 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Na2S
Formula mass
78.03
Boiling point, °C
174
Density
1.856 g/cm3 (14 C)
Solubility in water
150 g/L
Heat of fusion
0.06 kJ/mol

Hazards and Protection.
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.
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).
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
Unstable - can explode with shock or heat reactive at high temperature or pressure.
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.
Decomposition
When heated to decomposition, emits toxic fumes of sulfur oxides and disodium oxide.

Fire.
Fire fighting
Flood with water.
Fire potential
May burn but does not ignite readily.
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.
Combustion products
Irritating sulfur dioxide is produced in fire.
Health
3
 
Flammability
1
 
 
Reactivity
1
 

Health.
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.
   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.
   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.

First aid
 
   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.

Transport.
UN number
1385
Response guide
Hazard class
4.2
Packing Group
II
 
USCG CHRIS Code
SDS
 
43 Misc. water solutions
Std. Transport #
4936653
 
IMO Chemical Code
17
IMO Pollution Category
B