International Chemical Safety Cards

POTASSIUM SULFIDE ICSC: 0549
World Health Organization (WHO) International Labour Organization (ILO) United Nations Environmental Programme (UNEP) European Commission National Institute for Occupational Safety and Health (NIOSH)
Dipotassium monosulfide
Dipotassium sulfide
Potassium monosulfide
K2S
Molecular mass: 110.3
4 Spontaneously Combustible placard ICSC #    0549
CAS #     1312-73-8
RTECS # TT6000000
UN #        1382
EC #         016-006-00-1
September 04, 1997 Validated
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.
Water in large amounts, water spray.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Do NOT expose to friction or shock. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
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).
Local exhaust or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration if indicated. 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.
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 take to a doctor.
 •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 STORAGE PACKAGING & LABELLING
Do NOT wash away into sewer. Sweep spilled substance into containers (extra personal protection: chemical protection suit including self-contained breathing apparatus).
Fireproof. Separated from strong oxidants, strong acids. Dry.
Airtight.
C symbol
N symbol
R: 31-34-50
S: 1/2-26-45-61
UN Hazard Class: 4.2
UN Packing Group: II
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0549 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards

POTASSIUM SULFIDE ICSC: 0549
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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 explosively decompose on shock, friction, or concussion. The substance may spontaneously ignite on contact with air. On combustion, forms hydrogen sulfide and sulfur oxides. The substance decomposes on contact with acids producing highly toxic and flammable hydrogen sulfide (ICSC # 0165). The solution in water is a strong base, it reacts violently with acid and is corrosive. Reacts with oxidants producing 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, the skin and the respiratory tract. Inhalation of this substance may cause lung oedema (see Notes). Exposure at high levels may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
Melting point: 840°C
Relative density (water = 1): 1.8
Solubility in water: very good
ENVIRONMENTAL
DATA
Environmental Hazard placard The substance is harmful to aquatic organisms.
N O T E S
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.
Transport Emergency Card: TEC (R)-42G15

NFPA Code: H3; F1; R0;
Card has been partially updated in August 2007: see EU Classification.
ADDITIONAL INFORMATION


ICSC: 0549 POTASSIUM SULFIDE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.