1-Hydroxy Ethylidene-1 1-Diphosphonic Acid Liquid / HEDP
Product Properties
CAS No. 2809-21-4
Molecular Formula: C2H8O7P2 Molecular weight: 206.02
HS NO:2931900090
UN NO. 3265
It has good chemical stablity under high PH value,hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid and chlorine oxidation tolerance are better than that of other organophosphoric acids(salt).
The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals.
Product Applications
HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boliers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc. In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent. In non-cyanide electroplating, HEDP is used as chelating agent.
Specification
| Items |
Index |
| Appearance |
Clear, Colorless to pale yellow aqueous solution |
| Active content (HEDP)% |
58.0-62.0 |
| Phosphorous acid (as PO33-)% |
1.0 max |
| Phosphoric acid (asPO43- )% |
0.6 max |
| Chloride (as Cl-) ppm |
100.0 max |
| pH (1% solution) |
2.0 max |
| Density (20°C)g/cm3 |
1.43-1.47 |
| Fe,mg/L |
10.0 max |
| Colour APHA (Hazen) |
30.0 max |
| Acetic acid % |
0.5 max |
| Ca sequestration (mg CaCO3/g) |
500.0 min
|
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