Product Application

Eriochrome black T is used as an indicator in analytical chemistry. 
It is also used in the detection of rare earth metals. It finds application in dyeing and printing of wool fabric, dyeing of silk and nylon as well as in leather dyeing. It can be used in the spectrophotometric determination of diphenhydramine hydrochloride in pharmaceutical preparations. 

As a complexometric indicator, it is useful in the determination of hardness of water.

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