Disodium orthophosphate
Dibasic sodium phosphate
HO4PNa2
Molecular mass: 141.96
ICSC # 1129
CAS # 7558-79-4
RTECS # WC4500000
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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: use appropriate extinguishing media.
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Explosion
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Exposure
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•Inhalation
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Cough.
Sore throat.
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Ventilation.
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Fresh air, rest.
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•Skin
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Redness.
Pain.
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Protective gloves.
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Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
Pain.
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Safety goggles
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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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Abdominal pain.
Diarrhoea.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give one or two glasses of water to drink.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection: P2 filter respirator for harmful particles.
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
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Separated from strong acids.
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Signal: Warning
Causes mild skin irritation
Causes eye irritation
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Important Data
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Physical State; Appearance:
WHITE OR COLOURLESS HYGROSCOPIC CRYSTALS
OR
POWDER.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
producing
toxic fumes.
Reacts
violently with
strong acids
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Occupational Exposure Limits:
TLV not established.
MAK not established.
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Routes of Exposure:
Inhalation Risk:
A harmful concentration of airborne particles can be reached quickly when dispersed
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Effects of Short-Term Exposure:
The substance
is mildly irritating to
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 (decomposes): ca. 250°C
Density: 0.5-1.2
g/cm3
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Solubility in water, g/100 ml at 20°C: 7.7
Octanol/water partition coefficient as log Pow: -5.8 (calculated)
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Environmental
Data
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N O T E S
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ADDITIONAL INFORMATION
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ICSC: 1129
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DISODIUM HYDROGEN PHOSPHATE
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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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