Eriochrome black T
CAS: 1787-61-7
Molecular Formula: C20H12N3NaO7S
Molecular Weight: 461.38
Product description:Dark brown powder, soluble in hot water, cooling after a red brown solution, slightly soluble in ethanol, slightly soluble in acetone. When excessive hydrochloric acid generated precipitation, with sodium hydroxide as a dark blue, brown, purple red, after soluble in sulfuric acid into blue-black solution, dilute generated after brown precipitate; In nitric acid into orange solution.Commonly used metal indicator, complexing indicator, the determination of calcium, magnesium, barium, indium, strontium, zinc and manganese, lead, scandium, zirconium, For example, the determination of water hardness, Ca2 +, magnesium 2 +, etc. The content of metal ions.
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