Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP•Na2)

CAS No. 7414-83-7

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Details

Properties:

HEDP•Na₂ is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions, it can dissolve the oxidized materials, it has good scale and corrosion inhibition effects even under 250℃, it is stable under high pH value, not easy to be hydrolyzed, not easy to be decomposed under normal light and heat condition, its acid/alkaline and chloride oxidation tolerance are better than that of other organophosph-onic acids. HEDP•Na₂ can form six-ring chelating compounds with metal ions in water system, Ca2+ in particular. HEDP•Na₂ has good scale inhibition effects and obvious dissolution threshold effects. When used with other Water Treatment Chemicals, the synergistic effects is better.

Specification:

Items	Index
Appearance	Colorless to light yellow transparent liquid	White powder
Active component(HEDP), %	16.5 min	74.0-79.0
Active content(HEDP•Na₂), %	20.0 min	89.8 min
Density (20℃), g/cm³	1.12-1.22	--
Fe, mg/L	--	20 max
Phosphorous acid (PO₃^3-), %	--	3 max
Moisture, %	--	3.0-6.0
PH (1% water solution)	4.0-6.0	4.0-6.0

Usage:

HEDP•Na₂ is widely used in circulating cool 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•Na₂ is used as detergent for metal and nonmetal. In dyeing industry, HEDP•Na₂ is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP•Na₂ is used as chelating agent.

Packaging and storage:

Liquid: 200L plastic drum, IBC(1000L),customers' requirement. Storage for twelve months in shady room and dry place.

Solid: 25kg/bag, customers' requirement. Storage for ten months in shady room and dry place.

Safety and protection:

HEDP·Na2 is weakly acidic. Avoid contact with eyes and skin. Once splashed on the body, rinse immediately with plenty of water.

Synonyms:

Disodium Etidronate Hydrate;Disodium dihydrogen bisphosphonate (1-hydroxyethylidene)bisphosphonate

Keywords: HEDP·Na₂

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