Product Identification

Product Name

Trimellitic anhydride

Synonyms

1,2,4-Benzenetricarboxylic anhydride
1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid
1,3-Dioxo-2-benzofuran-5-carboxylic acid
Anhydrotrimellic acid
Benzene-1,2,4-tricarboxylic acid 1,2-anhydride

CAS

552-30-7

Formula

C9H4O5

Molecular Weight

192.13

EINECS

209-008-0

RTECS

DC2050000

RTECS Class

Other

Merck

12,9833

Beilstein/Gmelin

9394

Beilstein Reference

5-18-08-00312

EC Index Number

607-097-00-4

EC Class

Irritant; Sensitising

Physical and Chemical Properties

Appearance

Crystals or off-white flakes.

Solubility in water

216 g/L

Melting Point

162 - 165

Boiling Point

471

Vapor Pressure

1.2E-9 (25 C)

Density

1.55 g/cm3 (20 C)

Partition Coefficient

1.07

Heat Of Vaporization

77.2 kJ/mol

Usage

In prepn of resins, adhesives, polymers, dyes, printing inks.

Vapor Density

6.6

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Wash mouth out with water.

Inhalation

Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Store in a cool, dry place. Store in a tightly closed container.

Handling

Wash thoroughly after handling. Avoid contact with skin and eyes. Do not ingest or inhale. Use only in a chemical fume hood.

Hazards Identification

Inhalation

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.

Skin

Causes skin irritation. Causes redness and pain.

Eyes

Causes eye irritation. Causes redness and pain.

Ingestion

May cause irritation of the digestive tract. May cause nausea and vomiting.

EC Risk Phrase

R 37 41 42/43

EC Safety Phrase

S 22 26 36/37/39

UN (DOT)

3335

Exposure Controls/Personal Protection

Personal Protection

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.

Respirators

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.

Exposure Effects

Chronic inhalation may cause effects similar to those of acute inhalation.

Exposure limit(s)

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.

Poison Class

-

Fire Fighting Measures

Flash Point

227

Fire Fighting

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.

Upper exp. limit

7

Lower exp. limit

1

Fire Potential

This chemical is combustible.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity

Disposal Code

4

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents, strong acids, strong bases.

Decomposition

Carbon monoxide, carbon dioxide.

Transport Information

UN Number

3335

HS Code

2917 39 80