Product Identification

Product Name

Homophthalic acid

Synonyms

(2-Carboxyphenyl)acetic acid
(o-Carboxymethyl)benzoic acid
2-Carboxybenzeneacetic acid
a-Carboxy-o-toluic acid
o-Carboxybenzeneacetic acid
Toluene-a,2-dicarboxylic acid

CAS

89-51-0

Formula

C9H8O4

Molecular Weight

180.16

EINECS

201-913-9

RTECS

CY1575590

RTECS Class

Other

Beilstein/Gmelin

1872069

Beilstein Reference

4-09-00-03343

Physical and Chemical Properties

Appearance

Slightly yellow solid.

Solubility in water

Very soluble

Melting Point

278

Density

1.41 g/cm3

pKa/pKb

3.58 (pKa)

Partition Coefficient

1.09

First Aid Measures

Ingestion

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

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. Use with adequate ventilation. Avoid contact with skin and eyes. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

Low hazard for usual industrial handling.

Inhalation

Dust is irritating to the respiratory tract.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 26 36

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 minimize contact with skin.

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.

Fire Fighting Measures

Flash Point

190

Autoignition

505

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.

Accidental Release Measures

Small spills/leaks

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

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Carbon monoxide, carbon dioxide.