Product Identification
【Product Name】5-Methyl-1H-benzotriazole
【Synonyms】5-Methylbenzotriazole；5-甲基苯并三氮唑
【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℃)
【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 ggles, 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