Eriochrome Black T, ACS reagent (indicator grade)

Code: 858390-500g D2-231

Application

Eriochrome® Black T has been used to determine the concentration of Ca2+ using complexometric titration method.

General d...


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Application

Eriochrome® Black T has been used to determine the concentration of Ca2+ using complexometric titration method.

General description

Eriochrome® Black T is used as an indicator for complexometric titrations. It functions as an acid-base indicator. Eriochrome® Black T forms complex with Ca2+ and Mg2+, but it binds more strongly to Mg2+ ions.

Eriochrome® Black T is a hydroxyl-arylazo dye and is generally supplied as a monosodium salt. This dye exists as a dark violet powder with green metallic sheen. Eriochrome Black T is soluble in water and alcohol, but insoluble in common organic solvents. It is mainly used as an indicator in ethylenediaminetetraacetic acid (EDTA) method to determine hardness of water.

Legal Information

Eriochrome is a registered trademark of Huntsman Petrochemical, LLC

Packaging

100, 500 g in glass bottle

1 kg in glass bottle

λmax503 nm
application(s)diagnostic assay manufacturinghematologyhistology
clarity of solnpasses test
formpowder
gradeACS reagent (indicator grade)
InChI keyAMMWFYKTZVIRFN-QUABFQRHSA-M
InChI1S/C20H13N3O7S.Na/c24-17-10-18(31(28,29)30)15-9-12(23(26)27)6-7-14(15)19(17)22-21-16-8-5-11-3-1-2-4-13(11)20(16)25;/h1-10,24-25H,(H,28,29,30);/q;+1/p-1/b22-21+;
Quality Level200
SMILES string[Na+].Oc1cc(c2cc(ccc2c1N=Nc3ccc4ccccc4c3O)[N+]([O-])=O)S([O-])(=O)=O
storage temp.room temp
suitabilitypasses test for complexometric indicator
technique(s)titration: suitable
Code
Description
Unit Size
List Price
Qty
858390-100G
Eriochrome Black T, ACS reagent (indicator grade)

Unit:100G
List Price: £53.60
Source:List Price
ADD
858390-1KG
Eriochrome Black T, ACS reagent (indicator grade)

Unit:EACH
List Price: £351.00
Source:List Price
ADD
Cas Number1787-61-7
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