CODEX 7101

Chemical name

Tetra sodium salt of 1-hydroxyethylidene 1, 1- diphosphonic acid

Abbreviation   

Na4 HEDP

CAS No.

3794-83-0

Formula

C2P2O7H4Na4

Molecular weight

294

Physical Properties

Appearance

Colorless to pale yellow clear liquid

Typical Specifications

Active acid

21% min.

Active salt

29% min.

Specific gravity at 25oc

1.30 ± 0.01

pH of 1% solution

11-12

Iron content as Fe

20 ppm max.

Chloride as Cl

0.1 % max.

Sequestering value at pH11

Min. 176 mg of CaCO3  per gm of product

Packaging

Unit pack

60 kg carboy, 250 kg drums.