Product Identification

Product Name

1,2,3,6-Tetrahydro-4-methylphthalic anhydride

Synonyms

cis-4-Methyltetrahydrophthalic anhydride
cis-5-Methyl-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione
cis-Isomethyltetrahydrophthalic anhydride
cis-Methyltetrahydrophthalic anhydride

CAS

3425-89-6

Formula

C9H10O3

Molecular Weight

166.18

EINECS

222-323-8

Beilstein/Gmelin

135751

Beilstein Reference

5-17-11-00141

EC Index Number

607-240-00-0

EC Class

Irritant; Sensitising

Physical and Chemical Properties

Solubility in water

Slightly soluble

Melting Point

63

Boiling Point

295

Vapor Pressure

0.0007 (25 C)

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes.

Eyes

Immediately flush with running water for at least 20 minutes.

Hazards Identification

Inhalation

Inhalation of material may be harmful.

Skin

Contact may cause burns.

Eyes

See Skin.

Hazards

Containers may explode when heated.

EC Risk Phrase

R 41 42/43

EC Safety Phrase

S 22 24 26 37/39

UN (DOT)

3335

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Fire Fighting Measures

Flash Point

146

Fire Fighting

Small Fires: Dry chemical, carbon dioxide, water spray or regular foam. Large Fires: Water spray, fog or regular foam.

Fire Potential

May burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks

Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent dust cloud. Avoid inhalation of asbestos dust.

Transport Information

UN Number

3335

Stability and Reactivity

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.