用途
酸碱指示剂:媒介橙1在pH值10.0(黄色)至12.0(红色)范围内变色,常用于指示溶液的酸碱性,并可用其1%的钠盐作为指示剂。此外,它还用作金属着色剂。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-苯基叠氮水杨酸 | 2-hydroxy-5-phenylazo-benzoic acid | 3147-53-3 | C13H10N2O3 | 242.234 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-[(4-氨基苯基)偶氮]-2-羟基苯甲酸 | 5-(4-amino-phenylazo)-2-hydroxy-benzoic acid | 101-51-9 | C13H11N3O3 | 257.249 |
—— | 5-(4-nitrophenylazo)-2-(methacroyloxy)benzoic acid | 1073928-78-5 | C17H13N3O6 | 355.307 |
5-氨基水杨酸 | 5-Aminosalicylic Acid | 89-57-6 | C7H7NO3 | 153.137 |
In this paper, a micro-fluidic optimized process for the continuous flow synthesis of azo compounds is presented. The continuous flow synthesis of Sudan II azo dye was used as a model reaction for the study. At found optimal azo coupling reaction temperature and pH an investigation of the optimum flow rates of the reactants for the diazotization and azo coupling reactions in Little Things Factory-MS microreactors was performed. A conversion of 98% was achieved in approximately 2.4 minutes and a small library of azo compounds was thus generated under these reaction conditions from couplers with aminated or hydroxylated aromatic systems. The scaled up synthesis of these compounds in PTFE tubing (i.d. 1.5 mm) was also investigated, where good reaction conversions ranging between 66–91% were attained.