连二亚硫酸钠 , tech.

• 产品号: 33381
• CAS号: 7775-14-6
• 分子式: Na2O4S2
• 分子量: 174.10714
• 纯 度: 85+%

产品别名

• 标题: Sodium hydrosulfite, tech.
• IUPAC标准名: disodium sulfinatosulfinate
• IUPAC传统名: disodium dithionite
• 别名: Sodium dithionite; Sodium hypodisulfite

产品登记号

• MDL号: MFCD00011640
• EC号: 231-890-0
• 默克索引号: 148626
• CAS号: 7775-14-6

产品性质

• 纯度: 85+%
• 外观: Powder
• 熔点: 52°C dec.
• GHS危险声明: H251-H302
• 欧盟危险性物质标志: X
• 欧盟危险性物质标志: 氧化性(Oxidising) (O)
• GHS警示性声明: P280-P235+P410-P301+P312-P420-P407-P501A
• 危险公开号: 7-22-31
• 安全公开号: 7/8-26-28-43
• 保存注意事项: Moisture Sensitive
• TSCA收录: 是
• 联合国危险货物等级: 4.2
• 联合国危险货物编号: UN1384
• 联合国危险货物包装类别(PG): II

参考文献

• Useful reducing agent for a variety of functional groups. Often used in aqueous mixtures in combination with a base such as bicarbonate to prevent decomposition of the reagent by acid.
• Examples of reductions with the reagent:
• Nitroso compounds to amines: Org. Synth. Coll., 2, 33 (1943); 4, 247, (1963). Azo compounds to amines: Org. Synth. Coll., 1, 49 (1941); 2, 35, 39 (1943). Quinones to hydroquinones: Org. Synth. Coll., 4, 16 (1963). Aldehydes and ketones to alcohols: Synthesis, 246 (1977); for a phase-transfer method giving improved yields, see: J. Chem. Soc., Chem. Commun., 1080 (1979). For selective 1,4-reduction of conjugated aldehydes and ketones in the presence of unconjugated, see: Tetrahedron Lett., 36, 1107 (1995). Dehalogenation of ɑ-halo ketones: Synth. Commun., 12, 261 (1982).
• For a review of reductions with dithionite, including nitrogen functions, carbonyl compounds and 1,4-reductions of enones, see: Bull. Soc. Chim. Fr., 565 (1986).
• Also useful in small amounts as a decolorizing agent in the purification of organic compounds; see, e.g.: Org. Synth. Coll., 3, 86, 637 (1955); 4, 45 (1963).