結構式
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CAS: 288-13-1
分子式: C3H4N2
分子量: 68.08
中文名稱: 吡唑
英文名稱: 1H-Pyrazole
pyrazole
1,2-diazole
Pyrazol
1H-Pyrazol
1,2-Diazol
性質描述: 白色針狀或棱形結晶，從乙醇中結晶的吡唑是無色針狀晶體，有似吡啶的臭味和刺激性苦味，能溶于水、醇、醚和苯。當環上碳原子有取代基時，沸點和熔點升高；當氮原子上有取代基時，其化合物的沸點和熔點就降低。易發生氯化、溴化、碘化、烷基化、�；磻�。熔點69.5～70℃，沸點187～188℃(101kPa)，折射率1.4203。。
產品質量
外觀 白色結晶
熔點 67.00-70.00℃
含量 99.0%
水份 0.5%
用途: 當今世界，雜環化合物在醫藥、農藥的研究開發中占有十分重要的地位。無論是天然的還是人工合成的雜環化合物，在醫藥、農藥中都起著舉足輕重的作用。
其中吡唑類化合物因其作用譜廣、藥效強烈等特點而受到越來越多的關注。在醫藥應用上,吡唑類化合物對許多的疾病具有療效;在農藥應用上，吡唑類化合物具有殺蟲、殺菌和除草活性，并且表現出高效、低毒和結構多樣性。因此，吡唑類藥物具有廣闊的研究和開發前景。
吡唑可作為某些醫藥、農藥中間體，同時也可作為某些光敏材料單體的側鏈。吡唑的衍生物2-吡唑啉是醫藥和染料的重要中間體，具有廣泛的應用。
吡唑最重要的衍生物是5-吡唑酮。其衍生物氨基比林（又名匹拉米董）是一個古老的退熱藥，因它對粘膜和皮膚有刺激性，一些國家現已停止生產。4位上未被取代（見取代反應）的吡唑酮與重氮鹽偶聯，得到的偶氮化合物是一大類偶氮染料。
其它信息：
Product Identification
【Product Name】1H-Pyrazole
【Synonyms】1,2-Diazole 吡唑
【CAS】288-13-1
【Formula】C3H4N2
【Molecular Weight】68.08
【EINECS】206-017-1
【RTECS】UQ4900000
【RTECS Class】Reproductive Effector
【Merck】12,8144
【Beilstein/Gmelin】103775
【Beilstein Reference】5-23-04-00122
【EC Class】harmful, irritant
Physical and Chemical Properties
【Appearance】Colorless crystals.
【Solubility in water】Very soluble
【Melting Point】66 - 68
【Boiling Point】186
【Vapor Pressure】0.89 (25 C)
【Density】1.026 - 0.952 g/cm3 (70 - 155 C)
【pKa/pKb】11.53 (pKb)
【Partition Coefficient】.32
【Heat Of Vaporization】40.6 kJ/mol
【Heat Of Combustion】-1858 kJ/mol
【Usage】Chelating agent.
【Refractive Index】1.4203 (20 C)
First Aid Measures
【Ingestion】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. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
【Eyes】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. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Hazards Identification
【Inhalation】Inhalation of dust may cause respiratory tract irritation.
【Skin】May cause skin irritation.
【Eyes】May cause eye irritation.
【Ingestion】May be harmful if swallowed.
【Hazards】During a fire, irritating and highly toxic gasesmay be generated by thermal decomposition or combustion.
【EC Risk Phrase】R 22 36/37/38
【EC Safety Phrase】S 26 36/37/39
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】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.
【Exposure Effects】May cause reproductive and fetal effects.
Fire Fighting Measures
【Flash Point】88
【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: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
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. Provide ventilation.
Stability and Reactivity
【Disposal Code】3
【Incompatibilities】Oxidizing agents, acids.
【Stability】Stable under normal temperatures and pressures.
【Decomposition】Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.
Transport Information
【HS Code】2933 19 90
