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POTASSIUM SULFIDE
ICSC: 0549
Peer-Review Status: 04.09.1997 Validated
Dipotassium monosulfide
Dipotassium sulfide
Potassium monosulfide 
CAS #: 1312-73-8 RTECS #: TT6000000
UN #: 1382
EC #: 016-006-00-1
EINECS #: 215-197-0
    Formula: K2S
Molecular mass: 110.3

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking.  Use water in large amounts, water spray. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Do NOT expose to friction or shock. Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent deposition of dust.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Sore throat. Cough. Burning sensation. Shortness of breath. Headache. Dizziness. Nausea. Symptoms may be delayed. See Notes.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. 
Skin Pain. Blisters. Skin burns.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . Wear protective gloves when administering first aid. 
Eyes Pain. Redness. Severe deep burns.  Wear safety goggles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Burning sensation. Sore throat. Abdominal cramps. Nausea. Diarrhoea. Vomiting. See Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT wash away into sewer. Sweep spilled substance into covered containers.  Airtight. 
EC Classification
Symbol: C, N; R: 31-34-50; S: (1/2)-26-45-61 
UN Classification
UN Hazard Class: 4.2; UN Pack Group: II 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-42G15.
NFPA Code: H3; F1; R0. 
Fireproof. Separated from strong oxidants and strong acids. Dry. 

IMPORTANT DATA
Physical State; Appearance
HYGROSCOPIC WHITE CRYSTALS WITH CHARACTERISTIC ODOUR. TURNS RED OR BROWN ON EXPOSURE TO AIR. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
May decompose explosively on shock, friction or concussion. The substance may ignite spontaneously on contact with air. On combustion, forms hydrogen sulfide and sulfur oxides. Decomposes on contact with acids. This produces highly toxic and flammable hydrogen sulfide (see ICSC 0165). The solution in water is a strong base. It reacts violently with acid and is corrosive. Reacts with oxidants. This produces sulfur dioxide. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
The substance can be absorbed into the body by inhalation and by ingestion. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema. See Notes. Exposure at high levels could cause death. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Melting point: 840°C
Relative density (water = 1): 1.8
Solubility in water: very good 
The substance is harmful to aquatic organisms. 

NOTES
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation are therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
Card has been partially updated in August 2007: see EU Classification. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
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    See Also:
       Toxicological Abbreviations