Peroxydisulfuric acid, dipotassium salt
Potassium peroxydisulfate
K2S2O8
Molecular mass: 270.3
ICSC # 1133
CAS # 7727-21-1
RTECS # SE0400000
UN # 1492
EC # 016-061-00-1
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible but enhances combustion of other substances.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO contact with combustibles.
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In case of fire in the surroundings:
use appropriate extinguishing agent
.
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Explosion
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Risk of fire and explosion on contact withcombustible substances.
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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PREVENT DISPERSION OF DUST!
STRICT HYGIENE!
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•Inhalation
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Cough.
Wheezing.
Sore throat.
Laboured breathing.
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Local exhaust or breathing protection.
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Fresh air, rest.
Artificial respiration may be needed.
Refer for medical attention.
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•Skin
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Redness.
Pain.
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Protective gloves.
Protective clothing.
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First rinse with plenty of water, then remove contaminated clothes and rinse again.
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•Eyes
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Redness.
Pain.
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Safety goggles
or
eye protection in combination with breathing protection.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Nausea.
Vomiting.
Abdominal pain.
Diarrhoea.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give plenty of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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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.
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Cool.
Dry.
Well closed.
Separated from
combustible and reducing substances,
strong bases.
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O symbol
Xn symbol
R: 8-22-36/37/38-42/43
S: 2-22-24-26-37
UN Hazard Class: 5.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
WHITE
CRYSTALS
Physical Dangers:
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/m3 as TWA; (ACGIH 2004).
MAK: sensitization of respiratory tract and skin (Sah); (DFG 2004).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol
and
by ingestion.
Inhalation Risk:
Evaporation at 20°C 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.
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Physical
Properties
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Decomposes below melting point at <100°C
Density: 2.5
g/cm3
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Solubility in water, g/100 ml at 20°C: 5.2
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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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.
Transport Emergency Card: TEC (R)-51GO2-I+II+III
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ADDITIONAL INFORMATION
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ICSC: 1133
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POTASSIUM PERSULFATE
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(C) IPCS, CEC, 1994
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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.
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