ERIOCHROME BLACK T AR-ACS

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ERIOCHROME BLACK T AR-ACS Specification

CAS No
1787-61-7

Molecular Weight
461.38 g/mol

Usage
Typically used to identify calcium magnesium and other metal ions in complexometric analysis.

Molecular Formula
C20H12N3NaO7S

Appearance
Dark violet or black powder

Storage
Store in a cool dry place away from moisture and direct sunlight

Shape
Amorphous powder

Shelf Life
2 years under proper storage conditions

Poisonous
NO

Density
Gram per cubic centimeter(g/cm3)

HS Code
32050000

Melting Point
190-200C (decomposes)

Ingredients
Principal ingredient: Eriochrome Black T indicator dye

EINECS No
217-250-3

Physical Form
Powder

Smell
Odorless

Purity
Approximately 95%

Application
Used as an indicator in complexometric titrations

Solubility
Soluble in water and ethanol

Taste
Not applicable or tasteless

Ph Level
6.4-7.8 (in solution)

Grade
AR-ACS (Analytical Reagent - American Chemical Society standards)

Properties
Stable under recommended conditions shows color change under different pH levels during titration

Structural Formula
C20H12N3NaO7S (see specific diagrams for full structural formula)

About ERIOCHROME BLACK T AR-ACS

Eriochrome Black T AR-ACS is a dark violet or black amorphous powder used as an indicator in complexometric titrations to identify calcium, magnesium, and other metal ions. With a purity of approximately 95%, this Analytical Reagent grade powder is soluble in water and ethanol, exhibiting stable properties under recommended conditions. Its molecular formula C20H12N3NaO7S and molecular weight of 461.38 g/mol make it ideal for precise titration procedures, where it shows distinct color changes at different pH levels. It has a shelf life of 2 years when stored correctly.