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HEDP(1-Hydroxy Ethylidene-1,1-Diphosphonic Acid)
Specification:
items | index | |
Appearance | Colorless or light yellow transparent liquid | White crystal powder |
Active content(HEDP)% | 58.0-62.0 | 90.0min |
Phosphorous acid(as PO33-)% | 2.0max | 0.5max |
Phosphoric acid (asPO43 )% | 0.8max | 0.5max |
Chloride (as Cl-)% | 0.01max | 0.01max |
pH(1% solution) | 2max | 2max |
Density (20°C)g/cm3 | 1.40 | — |
Fe ion ppm | 10max | 20max |
Colour APHA (Hazen) | 40max | — |
Usage:
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.
Package and Storage:
HEDP liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required
HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag,, or confirmed by clients.
Storage for ten months in room shady and dry place.
HEDP(1-Hydroxy Ethylidene-1,1-Diphosphonic Acid)