HEDP
1-Hydroxyethylidene-1,1-diphosphonic Acid
Molecular Formula: C2H8O7P2
Molecular Weight: 206.03
CAS Number: 2809-21-4
EINECS Number: 220-552-8
items |
index |
|
Appearance |
Colorless or light yellow transparent liquid |
White crystal powder |
Active content (HEDP)% |
58.0-62.0 |
89.0 min |
Phosphorous acid (as PO33-)% |
1.0 max |
0.5 max |
Phosphoric acid (asPO43- )% |
0.5 max |
0.5 max |
Chloride (as Cl-)% |
0.3 max |
0.1 max |
pH (1% solution) |
2 max |
2 max |
Density (20℃)g/cm3 |
1.40 min |
- |
Fe ion ppm |
10 max |
20 max |
Ca sequestrant Value(mg Ca CO3/g) |
450 min |
- |
Colour APHA (Hazen) |
40 max |
- |