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Hydroxy
Ethylidene-1, 1-Diphosphonic Acid (HEDP)
CAS No.
2809-21-4 Molecular Formula: C2H8O7P2 Molecular weight:
206.02
H.S Code:
2931000090
Specification
|
items |
index |
|
Appearance |
Clear,Colorless to pale yellow aqueous solution |
White crystal powder |
|
Active content (HEDP)% |
58.0-62.0% |
90.0 min |
|
Phosphorous acid (as PO33-)% |
2.0% max |
0.5 max |
|
Phosphoric acid (asPO43-)% |
0.8% max |
0.5 max |
|
Chloride (as Cl-)% |
100 ppm max |
0.01 max |
|
pH
(1％
solution) |
2
max |
2
max |
|
Density (20℃)g/cm3 |
1.430 – 1.460 |
- |
|
Fe
ion ppm |
10
max |
20
max |
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Color(APHA) |
30
max |
- |
|
Ca
sequestration mgCaCO3/g |
480min |
- |
|
Acetic Acid |
1.0%max |
- |
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.
Safety Protection:
Acidity, Avoid contact with eye and skin, once contacted, flush with water. |
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