Product Identification

Product Name

5-Methyl-1H-benzotriazole

Synonyms

5-Methyl-1H-benzotriazole (1,2,3)
5-Methyl-2H-benzotriazole
5-Methylbenzotriazole

CAS

136-85-6

Formula

C7H7N3

Molecular Weight

133.16999999999999

EINECS

205-265-8

RTECS

DM1400000

RTECS Class

Other

Beilstein/Gmelin

116658

Beilstein Reference

4-26-00-00144

Physical and Chemical Properties

Appearance

Beige powder

Solubility in water

6 g/L

Melting Point

85

Boiling Point

361

Vapor Pressure

2E-5 (25 C)

pKa/pKb

8.66 (pKa)

Partition Coefficient

1.8

Heat Of Vaporization

60.6 kJ/mol

First Aid Measures

Ingestion

Do NOT induce vomiting. Allow the victim to rinse his mouth and then to drink 2-4 cupfuls of water, and seek medical advice.

Inhalation

Remove from exposure to fresh air immediately.

Skin

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

Eyes

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

Handling and Storage

Storage

Store in a cool, dry place. Keep container closed when not in use.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate safety goggles, protective clothing and gloves.

Respirators

Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.

Exposure Effects

The toxicological properties of this material have not been investigated.

Fire Fighting Measures

Flash Point

182

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

Accidental Release Measures

Small spills/leaks

Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.

Stability and Reactivity

Incompatibilities

Avoid contact with strong oxidizing agents, strong acids.

Stability

Stable under normal temperatures and pressures.

Hazards Identification

Hazards

During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.

EC Risk Phrase

R 22 36/37/38

EC Safety Phrase

S 26 36/37/39