结构式
             

CAS:  288-13-1
分子式: C3H4N2
分子量: 68.08

中文名称:  吡唑

英文名称:  1H-Pyrazole
                   pyrazole
                   1,2-diazole
                   Pyrazol
                   1H-Pyrazol
                   1,2-Diazol

性质描述:  白色针状或棱形结晶，从乙醇中结晶的吡唑是无色针状晶体，有似吡啶的臭味和刺激性苦味，能溶于水、醇、醚和苯。当环上碳原子有取代基时，沸点和熔点升高；当氮原子上有取代基时，其化合物的沸点和熔点就降低。易发生氯化、溴化、碘化、烷基化、酰化反应。熔点69.5～70℃，沸点187～188℃(101kPa)，折射率1.4203。。

产品质量
外观    白色结晶
熔点    67.00-70.00℃
含量    99.0%
水份    0.5%

用途: 　当今世界，杂环化合物在医药、农药的研究开发中占有十分重要的地位。无论是天然的还是人工合成的杂环化合物，在医药、农药中都起着举足轻重的作用。

　　其中吡唑类化合物因其作用谱广、药效强烈等特点而受到越来越多的关注。在医药应用上,吡唑类化合物对许多的疾病具有疗效;在农药应用上，吡唑类化合物具有杀虫、杀菌和除草活性，并且表现出高效、低毒和结构多样性。因此，吡唑类药物具有广阔的研究和开发前景。

　　吡唑可作为某些医药、农药中间体，同时也可作为某些光敏材料单体的侧链。吡唑的衍生物2-吡唑啉是医药和染料的重要中间体，具有广泛的应用。

        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）是一个古老的退热药，因它对粘膜和皮肤有刺激性，一些国家现已停止生产。4位上未被取代（见取代反应）的吡唑酮与重氮盐偶联，得到的偶氮化合物是一大类偶氮染料。

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