- 1,2,4-Benzenetricarboxylic anhydride
- 1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid
- Benzene-1,2,4-Tricarboxylic acid 1,2-Anhydride
Crystals or off-white flakes.
In prepn of resins, adhesives, polymers, dyes, printing inks.
Registry Numbers and Inventories.
EC Index Number
R 37 41 42/43
S 22 26 36/37/39
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
162 - 165
Boiling point, °C
Vapor pressure, mmHg
1.2E-9 (25 C)
Vapor density (air=1)
1.55 g/cm3 (20 C)
Solubility in water
Partition coefficient, pKow
Heat of fusion
Heat of vaporization
Hazards and Protection.
Store in a cool, dry place. Store in a tightly closed container.
Wash thoroughly after handling. Avoid contact with skin and eyes. Do not ingest or inhale. Use only in a chemical fume hood.
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Vacuum or sweep up material and place into a suitable disposal container.
Stable under normal temperatures and pressures.
Strong oxidizing agents, strong acids, strong bases.
Carbon monoxide, carbon dioxide.
Upper exp. limit, %
Lower exp. limit, %
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
This chemical is combustible.
TLV: 0.005 ppm; 0.04 mg/m3 (ACGIH 1992-1993). NIOSH REL: TWA 0.005 ppm (0.04 mg/m3) Should be handled in the workplace as an extremely toxic substance.
Chronic inhalation may cause effects similar to those of acute inhalation.
May cause irritation of the digestive tract. May cause nausea and vomiting.
Causes respiratory tract irritation. May cause severe allergic respiratory reaction. May cause anemia. Similar compounds have caused asthma, cough, wheezing, shortness of breath, anemia, weakness chills, fever, aching muscles and joints. May lead to restrictive lung disease.
Causes skin irritation. Causes redness and pain.
Causes eye irritation. Causes redness and pain.
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Wash mouth out with water.
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.