China China High Quality Angelica Dahurica Extract Factory - EDTA Disodium (EDTA-2Na) | 139-33-3 – COLORKEM Manufacturer and Supplier

China High Quality Angelica Dahurica Extract Factory - EDTA Disodium (EDTA-2Na) | 139-33-3 – COLORKEM

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China High Quality Angelica Dahurica Extract Factory - EDTA Disodium (EDTA-2Na) | 139-33-3 – COLORKEM Detail:

Products Description

Ethylenediaminetetraacetic acid, widely abbreviated as EDTA, is an aminopolycarboxylic acid and a colourless, water-soluble solid. Its conjugate base is named ethylenediaminetetraacetate. It is widely used to dissolve limescale. Its usefulness arises because of its role as a hexadentate (“six-toothed”) ligand and chelating agent, i.e. its ability to “sequester” metal ions such as Ca2+ and Fe3+. After being bound by EDTA, metal ions remain in solution but exhibit diminished reactivity. EDTA is produced as several salts, notably disodium EDTA and calcium disodium EDTA.

Specification

ITEM	STANDARD
Appearance	White crystalline powder
Identification	Pass test
Assay (C10H14N2Na2O8.2H2O)	99.0% ~ 101.0%
Chloride (Cl)	=< 0.01%
Sulphate (SO4)	=< 0.1%
pH (1%)	4.0- 5.0
Nitrilotriacetic acid	=< 0.1%
Calcium (Ca)	Negative
Ferrum (Fe)	=< 10 mg/kg
Lead (Pb)	=< 5 mg/kg
Arsenic (As)	=< 3 mg/kg
Mercury (Hg)	=< 1 mg/kg
Heavy metals (as Pb)	=< 10 mg/kg

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