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漂蓝6B又称酸性媒介漂蓝B(以下简称ECAB),国外相应的商品名叫Eriochrome Azurol B(Colour Index 43830)。它和光度分析中常用的铬天青S(CAS)相类似,都属于三苯甲烷类酸性染料。它比CAS少一个磺酸基,故在水中的溶解度较小。在试剂工业中,用它作原料,经磺酸化,可制备CAS。漂蓝6B为橙红色粉末。溶于乙醇呈黄橄榄色。遇浓硫酸呈红色,稀释后呈桔黄色。在浓碱溶液中呈紫色。一、漂蓝6B的制备和提纯我国天津染化二厂生产的漂蓝6B,其生产流程为:
Bleached blue 6B, also known as acid blue B (hereinafter referred to as ECAB), the corresponding foreign trade name Eriochrome Azurol B (Color Index 43830). It is similar to the chrome azure S (CAS) commonly used in photometric analysis and belongs to the class of triphenylmethane acid dyes. It has a sulfonic acid group less than CAS, so its solubility in water is small. In the reagent industry, use it as a raw material, sulfonic acid can be prepared CAS. Blue 6B is an orange-red powder. Soluble ethanol yellow olive. Case of concentrated sulfuric acid was red, diluted orange. Purple in concentrated alkali solution. First, the preparation and purification of blue 6B Blue Dyeing Factory in Tianjin, China produced bleaching blue 6B, the production process is: