Product Identification
【Product Name】4-Methylimidazole
【Synonyms】4-甲基咪唑
【CAS】822-36-6
【Formula】C4H6N2
【Molecular Weight】82.1
【EINECS】212-497-3
【RTECS】NI7350000
【RTECS Class】Tumorigen
【Beilstein/Gmelin】1453
【Beilstein Reference】5-23-05-00089

Physical and Chemical Properties
【Appearance】Slightly yellow solid.
【Solubility in water】Very soluble
【Boiling Point】263
【Vapor Pressure】0.02 (25 C)
【Density】1.0416 g/cm3 (14.3 C)
【pKa/pKb】6.51 (pKb)
【Partition Coefficient】.38
【Heat Of Vaporization】48.1 kJ/mol
【Refractive Index】1.5037 (14 C)

First Aid Measures
【Ingestion】Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
【Inhalation】Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
【Skin】Get medical aid immediately. Immediately 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 eyelids. Get medical aid immediately.

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 only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale.

Hazards Identification
【Ingestion】May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns.
【Inhalation】Effects may be delayed. May cause severe respiratory tract irritation. May cause burns to the respiratory tract.
【Skin】Causes skin burns. Effects may be delayed.
【Eyes】Causes eye burns.
【Hazards】Contact with metals may evolve flammable hydrogen gas.
【EC Risk Phrase】R 22 34
【EC Safety Phrase】S 26 36/37/39 45
【UN (DOT)】3263

Exposure Controls/Personal Protection
【Personal Protection】Eyes: Wear appropriate protective eyeglasses or chemical safety ggles 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】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.
【Poison Class】3

Fire Fighting Measures
【Flash Point】157
【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.
【Fire Potential】Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures
【Small spills/leaks】Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.

Stability and Reactivity
【Incompatibilities】Acids, acid chlorides, acid anhydrides, strong oxidizing agents.
【Stability】No data.
【Decomposition】Nitrogen oxides, carbon monoxide, carbon dioxide.
【Combustion Products】Fire may produce irritating, corrosive and/or toxic gases.

Transport Information
【UN Number】3263
【Hazard Class】8
【Packing Group】I; II; III