EDTA disodium salt dihydrate pure Ph. Eur., USP A3234

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EDTA disodium salt dihydrate pure Ph. Eur., USP

 

A3234

Synonym

Ethylenediaminotetraacetic acid disodium salt dihydrate, Ethylenedinitrilotetraacetic acid disodium salt dihydrate 

Ca-binding (pH 11)

approx. 265 mg CaCO3/g 

Solubility (20°C)

100 g/L (H2O) 

Formula

C10H14N2Na2O8 · 2H2O 

M

372.24 g/mol 

CAS-No.:

6381-92-6 

HS-No.:

29224985 

EC-No.:

205-358-3 

Storage:

RT 

LGK:

10 - 13 

Disposal:

3 

WGK:

2 

Specification

 

Assay (titr.)

98.5 - 101.0 % 

Assay (titr., calc. on dried subst.)

99,0 - 101,0 % 

Appearance of solution

complies 

Identity

complies 

pH (5 %; H2O)

4.0 - 5.5 (25°C) 

Heavy metals (as Pb)

max. 0.002 % 

Loss on drying

8.7 - 11.4 % 

Nitrilotriacetic acid

max. 0.1 % 

Ca

complies 

Fe

max. 0.008 %