CAS No.: | 2809-21-4 |
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Formula: | C2h8o7p2 |
EINECS: | 231-836-6 |
Appearance: | White to Slightly Colored Powder |
Grade Standard: | Industrial Grade |
pH (1%Water Solution): | Max 2.0 |
Samples: |
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Customization: |
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Phosphoric acid corrosion inhibitors & chelating agents HEDP Solid CAS 2809-21-4
Product Name: Hydroxyethylidene Diphosphonic acid ( HEDP ) ; 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP); HEDPA ; Oxyethylidenediphosphonic Acid ( OEDP ) ; Оксиэтилидендифосфоновая кислота(ОЭДФ -кислота )
Application:
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.
HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers 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. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.
Molecular formula: C2H8O7P2
CAS No.: 2809-21-4
Quality standard: HG/T 3537-2010
Specification:
Items | Index |
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Appearance | White crystal powder |
Active content (HEDP) | min 90% |
Active content (HEDP·H2O) | min 98% |
Phosphorous acid (as PO33-) | Max 0.8% |
Phosphoric acid (as PO43- ) | Max 0.5% |
Chloride (as Cl-) | Max 0.01% |
pH (1% water solution) | Max 2.0 |
Fe, mg/L | Max 10.0ppm |
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