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Eriochrome Black T (C.I. 14645)

Eriochrome Black T is a complexometric indicator that is used in complexometric titrations, e.g. in the water hardness determination process. It is an azo dye. Eriochrome is a trademark of Huntsman Petrochemical.
When used as an indicator in an EDTA titration, the characteristic blue end-point is reached when sufficient EDTA is added and the metal ions bound to the indicator are chelated by EDTA, leaving the free indicator molecule.

Product Details

Category Analytical Reagents
Dyes, Stains & Indicators
Price POA
CAS Number 1787-61-7
Formula C20H12N3NaO7S
Molecular Weight 461.38
Purity Absorptivity Lambda min 621nm
Appearance Black powder
Availability In Stock
Storage Conditions Room temperature

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