HEDP•Na4
Product Description
Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
(HEDP•Na4)
CAS No.: 29329-71-3 (x-Na), 3794-83-0 (4-Na)
EINECS No.: 223-267-7
Molecular Formula: C2H4O7P2Na4 Molecular Weight: 294
Structural Formula:
Properties:
HEDP•Na4 is the sodium salt of HEDP, which is an excellent scale inhibitor for calcium carbonate. It is mainly used in low pressure boiler water system, circulating water system, industrial and municipal cleaning water system and swimming pool.
The solid HEDP•Na4 is white powder, soluble in water, easily deliquescence, suitable for use in cold and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor, can form stable complex with Fe, Cu and Zn ions, can dissolve the oxides on metal surface. It has good scale and corrosion inhibition effect even under 250℃.
HEDP•Na4 is widely used in circulating cooling water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, HEDP•Na4 is used as detergent for metal and nonmetal. In dyeing industry, HEDP•Na4 is used as peroxide stabilizer and dye-fixing agent. In non-cyanide electroplating, HEDP•Na4 is used as chelating agent.
Specification:
Items | Index | |
Appearance | Colorless to yellowish transparent liquid | White powder |
Active content (HEDP)% | 20.3-21.7 | 60.0 min |
Active content (HEDP•Na4)% | 29.0-31.0 | 85.0 min |
Total phosphoric acid (as PO43-)% | 18.4-20.4 | 55.0 min |
Fe, mg/L | 20.0 max | 35.0 max |
Moisture，% | -- | 9.0 max |
Density (20℃)g/cm3 | 1.26-1.36 | -- |
PH (1% water solution) | 10.0-12.0 | 11.0-12.0 |
Package and Storage:
HEDP•Na4 liquid: Normally in 200L HDPE drum, 1000L IBC, or customers’ requirement.
HEDP•Na4 solid: 25kg inner liner PE bag, 1000kg woven bag, or customers’ requirement.
Storage for ten months in shady room and dry place.
Safety Protection:
Weak acidity, Avoid contact with eye and skin, once contacted, flush with water.
Synonyms:
Tetrasodium (1-hydroxyethylidene)bisphosphonate
Salts of Phosphonates ( Antiscalants, Corrosion Inhibitors and Chelating Agents )