Product Identification

Product Name

Benzene-1,2-dicarboxylic acid

Synonyms

1,2-Benzenedicarboxylic acid
o-Dicarboxybenzene

CAS

88-99-3

Formula

C8H6O4

Molecular Weight

166.13

EINECS

201-873-2

RTECS

TH9625000

RTECS Class

Mutagen; Reproductive Effector

Merck

12,7527

Beilstein/Gmelin

608199

Beilstein Reference

4-09-00-03167

EC Class

irritant

Physical and Chemical Properties

Appearance

Colorless or white crystalline material or powder.

Solubility in water

5.7 g/L

Melting Point

79

Boiling Point

315-317

Vapor Pressure

2E-6 (25 C)

Density

1.576 g/cm3

pKa/pKb

2.76 (pKa)

Partition Coefficient

.73

Heat Of Vaporization

66.1 kJ/mol

Heat Of Combustion

-3224 kJ/mol

Usage

Dyes, phenolphthalein, phthalimide, anthranilic acid, synthetic perfumes, laboratory reagent.

Saturation Concentration

Very low at 25 C.

Vapor Density

5.73

First Aid Measures

Ingestion

Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or 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. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Eyes

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

Handling and Storage

Storage

Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Inhalation

Causes respiratory tract irritation.

Skin

May cause skin irritation. May cause dermatitis.

Eyes

Causes eye irritation.

Ingestion

Causes gastrointestinal irritation with nausea, vomiting and diarrhea.

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 prevent skin exposure.

Respirators

A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.

Exposure Effects

Prolonged or repeated skin contact may cause dermatitis.

Poison Class

4

Fire Fighting Measures

Flash Point

205

Autoignition

496

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Upper exp. limit

7.7

Lower exp. limit

1.3

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Disposal Code

4

Stability

Stable at room temperature in closed containers under normal storage and handling conditions.

Incompatibilities

Strong oxidizing materials.

Decomposition

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Transport Information

HS Code

2917 39 80