·中文名称:偶氮磺III[碱性稀土金属用的分光光度试剂及硫酸根用钡的沉淀滴定指示剂用]·英文名称:Sulfonazo III [Spectrophotometric reagent for alkaline earth metals and indicator for the precipitation titration of SO4 with Ba]·CAS号:68504-35-8·化学式:C22H12N4Na4O14S4·分子量:776.55·纯度: