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偶氮氯膦-mA是一种不对称变色酸双偶氮氯膦酸型显色剂。化学名称为2-(4-氯-2-瞵酸基苯偶氮)-7-(3-乙酰苯偶氮)-1.8-二羟基-3.6-萘二磺酸,它是深紫红色结晶粉末,易溶于水,在中性和酸性溶液中呈紫红色。在酸性介质中能与希土元素形成蓝紫色4∶1络合物。其结构式如下:
Chlorophosphonazo-mA is an asymmetric chromotropic acid bis-chlorophosphonate type developer. The chemical name is 2- (4-chloro-2-galhenylaphenylazo) -7- (3-acetophenylazo) -1.8-dihydroxy-3.6-naphthalenedisulfonic acid as a dark purple crystalline powder , Soluble in water, purple in neutral and acidic solution. In acid medium with the formation of blue-purple 4: 1 complex with the rare earth elements. Its structure is as follows: