Sodium pyrophosphate
Pyrophosphoric acid, tetrasodium salt
Na4O7P2
Molecular mass: 266
ICSC # 1140
CAS # 7722-88-5
RTECS # UX7350000
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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.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: all extinguishing agents allowed.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
Sore throat.
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Ventilation (not if powder).
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety spectacles.
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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.
Diarrhoea.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
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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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water.
(Extra personal protection: P1 filter respirator for inert particles).
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Important Data
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Physical State; Appearance:
ODOURLESS
COLOURLESS OR WHITE CRYSTALS,
OR POWDER.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on burning.
The solution in water is a weak base.
Occupational Exposure Limits:
TLV not established.
MAK not established.
OSHA PEL: none
NIOSH REL: TWA 5 mg/m3
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of dust and
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly if powdered.
Effects of Short-Term Exposure:
The substance
irritates the eyes, the skin and the respiratory tract.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Melting point: (see Notes) 988°C
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Relative density (water = 1): 2.5
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Environmental
Data
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N O T E S
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Other melting points: 880°C (powder).
Card has been partially updated in February 2009: see Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 1140
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TETRASODIUM PYROPHOSPHATE
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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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