Product Description
HEDP (*-Hydroxy Ethylidene*1, *-Diphosphonic Acid) CAS No.
********4 HEDP is an organophosphoric acid corrosion inhibitor. It
can chelate with Fe, Cu, and Zn ions to form stable chelating *****
can dissolve the oxidized materials on these metals’ surfaces. HEDP
shows excellent scale and corrosion inhibition effects under
temperature **0centigrade. HEDP has good chemical stability under
high pH value, hard to be hydrolyzed, and hard to be decomposed
under ordinary light and heat conditions. Its acid/alkali and
chlorine oxidation tolerance are better than that of other
organophosphoric acids (salt). HEDP can react with metal ions in
water system to form hexa-element chelating complex, with calcium
ion in particular. Therefore, HEDP has good antiscale and visible
threshold effects. When built together with other water treatment
chemicals, it shows good synergistic effects. 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.
Specification: Appearance: Colorless or light yellow transparent
liquid White crystal powder Active content (HEDP): *8.***2.0% *9.0
% min Phosphorous acid (as PO**-): 2.0 % max 0.5 % max Phosphoric
acid (asPO**- ): 0.8 % max 0.5% max Chloride (as Cl-): 0.*1 % max
0.*1 % max pH (1% solution): 2 max 2 max Density (*0centigrade):
1.*0 g/cm3 - Fe ion ppm: *0 max *0 max Colour APHA (Hazen): *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, ***** 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
***0mg/L is preferred as scale inhibitor, ****0mg/L as corrosion
inhibitor, and ********0mg/L as detergent. Usually, HEDP is used
together with polycarboxylic acid. Package and Storage: HEDP
liquid: Normally In **0kg net Plastic Drum, IBC drum can also be
used as required HEDP solid: *5kg inner liner polyethylene (PE)
bag, outer plastic woven bag, or confirmed by clients. Storage for
ten months in room shady and dry place.
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CAS No. 2809-21-4
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