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TRIMELLITIC ANHYDRIDE ICSC: 0345
Date of Peer Review: October 2005

1,2,4-Benzenetricarboxylic anhydride
1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid
CAS # 552-30-7 C9H4O5
RTECS # DC2050000 Molecular mass: 192.2
UN #
EC Index # 607-097-00-4
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible.
NO open flames.
Water spray, powder.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Prevent build-up of electrostatic charges (e.g., by grounding). Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!

Inhalation Cough. Blood stained sputum. Headache. Nausea. Shortness of breath. Wheezing. Symptoms may be delayed (see Notes).
Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin Redness. Pain.
Protective gloves.
Remove contaminated clothes. Rinse skin with plenty of water or shower.
Eyes Redness. Pain.
Safety goggles or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Nausea. Abdominal pain. Burning sensation. Vomiting. Diarrhoea.
Do not eat, drink, or smoke during work.
Rinse mouth. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Personal protection: P3 filter respirator for toxic particles. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder.
EU Classification
Symbol: Xn
R: 37-41-42/43
S: (2-)-22-26-36/37/39
UN Classification

EMERGENCY RESPONSE STORAGE

Dry. Separated from bases and strong oxidants. Ventilation along the floor.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
TRIMELLITIC ANHYDRIDE ICSC: 0345
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS CRYSTALS OR POWDER

PHYSICAL DANGERS:
Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.

CHEMICAL DANGERS:
Reacts violently with bases and oxidants. Reacts slowly with water to form trimellitic acid.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.04 mg/m (Ceiling value); (ACGIH 2005).
MAK: 0.04 mg/m; sensitization of respiratory tract (Sa); Peak limitation category: I(1); (DFG 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation and by ingestion.

INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the skin, the respiratory tract and is severely irritating to the eyes. Inhalation of dust may cause asthma-like reactions.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged inhalation exposure may cause asthma. The substance may cause allergic reactions with flu-like symptoms and 'pulmonary disease-anaemia syndrome'.
PHYSICAL PROPERTIES
Boiling point at 1.87kPa: 240-245C
Melting point: 161-163.5C
Solubility in water: reaction
Vapour pressure, kPa at 25C: negligible
Relative vapour density (air = 1): 6.6
Flash point: 227C o.c.
ENVIRONMENTAL DATA

NOTES
The symptoms of allergic reactions including asthma do not become manifest until 4 to 12 hours. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact. The occupational exposure limit value should not be exceeded during any part of the working exposure. Do NOT take working clothes home.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005