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POTASSIUM PERSULFATE ICSC: 1133
Date of Peer Review: October 2002

Peroxydisulfuric acid, dipotassium salt
Potassium peroxydisulfate
CAS # 7727-21-1 K2S2O8
RTECS # SE0400000 Molecular mass: 270.3
UN # 1492
EC # 016-061-00-1
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire.
NO contact with combustibles.
In case of fire in the surroundings: use appropriate extinguishing agent.
EXPLOSION Risk of fire and explosion on contact with combustible substances.

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!

Inhalation Cough. Wheezing. Sore throat. Laboured breathing.
Local exhaust or breathing protection.
Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Pain.
Protective gloves. Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again.
Eyes Redness. Pain.
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 Nausea. Vomiting. Abdominal pain. Diarrhoea.
Do not eat, drink, or smoke during work.
Rinse mouth. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Do NOT absorb in saw-dust or other combustible absorbents. Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Cautiously neutralize remainder. Wash away remainder with plenty of water. Do NOT let this chemical enter the environment. Personal protection: P2 filter respirator for harmful particles.
EU Classification
Symbol: O, Xn
R: 8-22-36/37/38-42/43
S: (2-)-22-24-26-37
UN Classification
UN Hazard Class: 5.1
UN Pack Group: III
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-51GO2-I+II+III
Cool. Dry. Well closed. Separated from combustible and reducing substances, strong bases.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2004

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POTASSIUM PERSULFATE ICSC: 1133
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALS

CHEMICAL DANGERS:
Heating may cause violent combustion or explosion. The substance decomposes on heating producing toxic fumes including sulfur oxides. The substance is a strong oxidant and reacts with combustible and reducing materials. The solution in water is a medium strong acid. Reacts violently with chlorates and perchlorates in the presence of water causing explosion hazard. Reacts in the presence of water with metals such as aluminium causing fire hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as persulfate) 0.1 mg/m as TWA; (ACGIH 2004).
MAK: sensitization of respiratory tract and skin (Sah); (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or when dispersed, especially if powdered.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes, the skin and the respiratory tract. Inhalation of dust may cause asthma-like reactions.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma. May cause general allergic reaction, like urticaria or shock.
PHYSICAL PROPERTIES
Decomposes below melting point at <100C
Density: 2.5 g/cm
Solubility in water, g/100 ml at 20C: 5.2
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
NOTES
Rinse contaminated clothes (fire hazard) with plenty of water. The symptoms of asthma 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. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance. Do NOT take working clothes home.
Card has been partly updated in April 2005. See section Occupational Exposure Limits.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2004