IPCS INCHEM Home
TRIMELLITIC ANHYDRIDEICSC: 0345
October 2005
CAS #: 552-30-71,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid
1,2,4-Benzenetricarboxylic anhydride
EINECS #: 209-008-0

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.  Finely dispersed particles form explosive mixtures in air.  NO open flames.  Prevent build-up of electrostatic charges (e.g., by grounding). Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use water spray, powder.   

 PREVENT DISPERSION OF DUST! STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Headache. Nausea. Shortness of breath. Wheezing. Symptoms may be delayed. See Notes.  Use 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.  Wear 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 refer for medical attention. 
Ingestion Nausea. Abdominal pain. Burning sensation. Vomiting. Diarrhoea.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
Dry. Separated from bases and strong oxidants. Ventilation along the floor. 
PACKAGING
 
TRIMELLITIC ANHYDRIDE ICSC: 0345
PHYSICAL & CHEMICAL INFORMATION

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. This produces trimellitic acid. 

Formula: C9H4O5
Molecular mass: 192.2
Boiling point at 1.87kPa: 240-245°C
Melting point: 161-163.5°C
Solubility in water: reaction
Vapour pressure at 25°C: negligible
Relative vapour density (air = 1): 6.6
Flash point: 227°C o.c. 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation and by ingestion. 

Effects of short-term exposure
The substance is severely irritating to the eyes. The substance is irritating to the skin and respiratory tract. Inhalation of dust may cause asthma-like reactions. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation may cause asthma. The substance may cause allergic reactions with flu-like symptoms and 'pulmonary disease-anaemia syndrome'. 


Occupational exposure limits
TLV: 0.0005 mg/m3, ppm, as TWA; 0.002 mg/m3 as STEL; (skin); (SEN).
MAK: (respirable fraction): 0.04 mg/m3; peak limitation category: I(1); sensitization of respiratory tract (SA) 

ENVIRONMENT
 

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
  EC Classification
Symbol: Xn; R: 37-41-42/43; S: (2)-22-26-36/37/39 

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.
    See Also:
       Toxicological Abbreviations
       Trimellitic anhydride (HSG 71, 1992)