Eriochrome black T ACS is a dark violet powder with green metallic sheen. It is a hydroxyl-arylazo dye and is generally supplied as a monosodium salt. Its molecular formula is C20H12N3NaO7S. Eriochrome Black T is soluble in water and alcohol, but insoluble in common organic solvents. It functions as an acid-base indicator. Eriochrome Black T ACS is also known as Solochrome Black T, Mordant Black 11, 3-Hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-7-nitro-1-naphthalenesulfonic Acid Monosodium Salt. It turns red when it forms a complex with calcium, magnesium, or other metal ions. ACS grade Eriochrome black T is manufactured to meet the purity standards set by the American Chemical Society (ACS), ensuring high quality and consistency.
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Application :
- Eriochrome Black T ACS is used as an indicator for complexometric titrations.
- It is used for the determination of calcium and magnesium by titration with EDTA.
- It has also been used to detect the presence of rare earth metals.
- It is mainly used as an indicator in ethylenediaminetetraacetic acid (EDTA) method to determine hardness of water.
Key features :
- Meet the toughest regulatory standards for quality and purity.
- Strong acid base indicator
- Safe and easy to handle