Product name:Eriochrome Black T
CAS:1787-61-7
Molecular Formula:C20H12N3NaO7S
Formula Weight:461.38
Description:
Specification:25g
Eriochrome Black T is a complexometric indicator that is part of the complexometric titrations, eg. in the water hardness determination process. It is an azo dye.
When used as an indicator in an EDTA titration, the characteristic blue end-point is reached when sufficient EDTA is added and metal ions form complexes with the EDTA instead of the Eriochrome.
Eriochrome Black T has also been used to detect the presence of rare earth metals.