Skip to Content
Merck
All Photos(4)

Documents

858390

Sigma-Aldrich

Eriochrome® Black T

ACS reagent (indicator grade)

Synonym(s):

Mordant Black 11

Sign Into View Organizational & Contract Pricing


About This Item

Empirical Formula (Hill Notation):
C20H12N3NaO7S
CAS Number:
Molecular Weight:
461.38
Colour Index Number:
14645
Beilstein:
4121162
EC Number:
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
NA.47

grade

ACS reagent (indicator grade)

Quality Level

form

powder

clarity of soln

passes test

technique(s)

titration: suitable

λmax

503 nm

suitability

passes test for complexometric indicator

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].Oc1cc(c2cc(ccc2c1\N=N\c3ccc4ccccc4c3O)[N+]([O-])=O)S([O-])(=O)=O

InChI

1S/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+;

InChI key

AMMWFYKTZVIRFN-QUABFQRHSA-M

Looking for similar products? Visit Product Comparison Guide

General description

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.
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.

Application

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

Legal Information

Eriochrome is a registered trademark of Huntsman Petrochemical, LLC

Pictograms

Exclamation markEnvironment

Signal Word

Warning

Hazard Statements

Hazard Classifications

Aquatic Chronic 2 - Eye Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Biologizing titanium alloy implant material with morphogenetically active polyphosphate
Muller WEG, et al.
Royal Society of Chemistry Advances, 5(92), 75465-75473 (2015)
A Text Book Of Chemistry Practicals (2 Vols) (1995)
Laboratory Manual for Principles of General Chemistry (2010)
Chemistry for engineers (2008)
Physical Chemistry for the JEE and Other Engineering Entrance Examinations (2013)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service