2-Hydroxy-1,2,3-propanetricarboxylic acid monohydrate
Citric acid hydrate
C6H8O7•H2O / HOOCCH2C(OH)(COOH)CH2COOH•H2O
Molecular mass: 210.1
ICSC # 0704
CAS # 5949-29-1
RTECS # GE7810000
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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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Combustible.
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NO open flames.
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Water spray, foam, powder, carbon dioxide.
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Explosion
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Finely dispersed particles form explosive mixtures in air.
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Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
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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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Local exhaust or breathing protection.
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Fresh air, rest.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
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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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Burning sensation.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give plenty 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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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water.
Personal protection: P2 filter respirator for harmful particles.
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Separated from
strong bases,
oxidants
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Important Data
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Physical State; Appearance:
SLIGHTLY DELIQUESCENT WHITE CRYSTALS
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
Chemical Dangers:
The solution in water is a weak acid.
Attacks copper, zinc, aluminium and their alloys.
Occupational Exposure Limits:
TLV not established.
MAK: IIb (not established but data is available); (DFG 2005).
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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:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The aerosol
is 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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Decomposes below boiling point at 175°C
Melting point: 135°C
Density: 1.5
g/cm3
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Solubility in water, g/100 ml at 20°C: 59.2
Auto-ignition temperature: 1010°C
Octanol/water partition coefficient as log Pow: -1.72
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Environmental
Data
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N O T E S
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Card has been partly updated in October 2005. See section Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0704
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CITRIC ACID, MONOHYDRATE
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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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