Eriochrome black T
Indicator
Reagent
Code: #55024
Alias
Chrome Black T ; Ella Chrome Black T, Wool Chrome Black T, Media Black T, Acid Media Black T
CAS Number
1787-61-7
science Other reagents with same CAS 1787-61-7
blur_circular Chemical Specifications
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Molecular Information
Weight
461.38 g/mol
Formula
C₂₀H₁₂N₃NaO₇S
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Registry Numbers
EC Number
217-250-3
MDL Number
MFCD00003935
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Storage & Handling
Density
1.109 g/mL at 25 °C
Storage
room temperature
description Product Description
Eriochrome black T is widely used as a pH indicator and complexometric indicator in analytical chemistry. It is particularly valuable in the titration of metal ions, especially calcium and magnesium, in water hardness testing. When added to a solution, it forms colored complexes with these metal ions, allowing for precise endpoint detection during titration with EDTA. Its distinct color change from red to blue at the endpoint makes it a reliable tool for determining the concentration of metal ions in various samples. Additionally, it is employed in educational laboratories to teach students about complexometric titrations and water quality analysis.
format_list_bulleted Product Specification
| Test Parameter | Specification |
|---|---|
| Appearance | Black powder |
| Max | 503 nm |
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