三氧化铬(VI)

• 产品号: 12522
• CAS号: 1333-82-0
• 分子式: CrO3
• 分子量: 99.9943
• 纯 度: 99%

产品别名

• 标题: Chromium(VI) oxide
• IUPAC标准名: λ^6-chromium(6+) ion trioxidandiide
• IUPAC传统名: λ^6-chromium(6+) ion trioxidandiide

产品登记号

• EC号: 215-607-8
• CAS号: 1333-82-0
• 默克索引号: 142235
• MDL号: MFCD00010952

产品性质

• 纯度: 99%
• 外观: Crystalline
• 沸点: 250°C dec.
• 密度: 2.7
• 熔点: 196°C
• GHS危险声明: H271-H301-H310-H330-H317-H334-H340-H350-H372-H361-H314-H318-H400-H410
• 欧盟危险性物质标志: 剧毒(Highly toxic) (T+)
• 欧盟危险性物质标志: 氧化性(Oxidising) (O)
• 欧盟危险性物质标志: 环境危害性(Nature polluting) (N)
• GHS警示性声明: P221-P283-P301+P310-P303+P361+P353-P304+P340-P305+P351+P338-P320-P330-P361-P405-P501A
• 危险公开号: 45-46-9-24/25-26-35-42/43-48/23-62-50/53
• RTECS编号: GB6650000
• 安全公开号: 53-45-60-61
• 保存注意事项: Hygroscopic
• TSCA收录: 是
• 联合国危险货物等级: 5.1
• 联合国危险货物编号: UN1463
• 联合国危险货物包装类别(PG): II

参考文献

• Numerous examples of oxidations with this reagent are to be found in Organic Syntheses. For directions for preparation of chromic acid (Jones) reagent, see: Org. Synth. Coll., 5, 866 (1973).
• For preparation of alumina-supported reagent, and use in chemoselective oxidation, for example of allylic alcohols, see: Synth. Commun., 24, 1823 (1994). For selective oxidation of aliphatic alcohols to aldehydes in ether/water, see: Chem. Ind. (London), 312 (1989). Has also been used catalytically in the presence of a co-oxidant, see Sodium perborate tetrahydrate, A10189, and Periodic acid, B20433.
• Several CrO₃ based reagents have been developed, usually with the objective of increasing selectivity, of which CrO₃:(Pyridine)₂ (Collins' reagent) is probably the most widely used. For a procedure, see: Org. Synth. Coll., 6, 644 (1988). However, to control the highly exothermic reaction (possible fire hazard!), the reagent is probably best prepared and used in situ in dichloromethane: J. Org. Chem., 35, 4000 (1970); Org. Synth. Coll., 6, 373 (1988);or acetonitrile: J. Org. Chem., 45, 1135, 1142 (1980). The use of Celite. as a support for the reagent has been found to be beneficial: same ref. and: Synth. Commun., 3, 115 (1973); Tetrahedron Lett., 2079 (1973). See also Pyridinium chlorochromate, A11752, 2,2'-Bipyridine, A15782, 3,5-Dimethyl-1H-pyrazole, A10157, and Potassium chlorochromate, A19000.