1,3-Benzenedicarboxylic acid
m-Phthalic acid
C8H6O4 / C6H4(COOH)2
Molecular mass: 166.1
ICSC # 0500
CAS # 121-91-5
RTECS # NT2007000
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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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Local exhaust.
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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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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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Do not eat, drink, or smoke during work.
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Rinse mouth.
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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.
Carefully collect remainder,
then remove to safe place.
Personal protection: P2 filter respirator for harmful particles.
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Important Data
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Physical State; Appearance:
COLOURLESS
CRYSTALLINE POWDER.
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
Chemical Dangers:
Occupational Exposure Limits:
TLV not established.
MAK: 2 mg/m3 (Inhalable fraction);
Peak limitation category: I(2); Pregnancy risk group: C;
(DFG 2006).
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Routes of Exposure:
The substance can be absorbed into the body
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly.
Effects of Short-Term Exposure:
The substance
is mildly irritating to
the skin
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Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Melting point: 345-348°C
Relative density (water = 1): 1.54
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Solubility in water: none in cold water, poor in boiling water
Auto-ignition temperature: >650°C
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Environmental
Data
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N O T E S
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Sublimes without decomposition.
Card has been partially updated in July 2007: see Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0500
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ISOPHTHALIC ACID
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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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