Eriochrome^® Black T

SIAL/858390 - ACS reagent (indicator grade)

Synonym: Mordant Black 11

CAS Number: 1787-61-7
Empirical Formula (Hill Notation): C₂₀H₁₂N₃NaO₇S
Molecular Weight: 461.38
EC Number: 217-250-3
MDL Number: MFCD00003935
Linear Formula: C₂₀H₁₂N₃NaO₇S
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-858390-100G	100 g	$33.40 1/EA	Add To Favorites
45-858390-500G	500 g	$148.00 1/EA	Add To Favorites
45-858390-1KG	1 kg	$218.00 1/EA	Add To Favorites

This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 858390-1KG

Properties
Descriptions
Safety Info.
Basic Data

λ_max	503 nm
application(s)	diagnostic assay manufacturing hematology histology
clarity of soln	passes test
form	powder
grade	ACS reagent (indicator grade)
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
Quality Level	200
SMILES string	[Na+].Oc1cc(c2cc(ccc2c1N=Nc3ccc4ccccc4c3O)[N+]([O-])=O)S([O-])(=O)=O
storage temp.	room temp
suitability	passes test for complexometric indicator
technique(s)	titration: suitable

Application:	Eriochrome^® Black T has been used to determine the concentration of Ca²⁺ using complexometric titration method.
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.
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.
Legal Information:	Eriochrome is a registered trademark of Huntsman Petrochemical, LLC
Packaging:	1 kg in glass bottle
Packaging:	100, 500 g in glass bottle

Symbol	GHS09
Hazard statements	H411
Precautionary statements	P273 - P391 - P501
RIDADR	NONH for all modes of transport
WGK Germany	WGK 2
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

Storage Temp.	room temp
Colour Index Number	14645
UNSPSC	12171500

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