HEDP

HEDP (ZEELCHEM™ 101)

1.HEDP 60 % (1-Hydroxyethylene 1, 1-Diphosphonic Acid)

CAS No. 2809-21-4
Molecular Formula: C2H8O7P2

Molecular weight: 206.02

hedp
hedp

2.Usage

ZEELCHEM™ 101 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.. Usually, ZEELCHEM™ 101 used together with the polycarboxylic acid. In light woven industry, HEDP used as detergent for metal and nonmetal. In dyeing industry, ZEELCHEM™ 101 used as peroxide stabilizer and dye-fixing agent; non-cyanide electroplating, ZEELCHEM™ 101 used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as the corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, ZEELCHEM™ 101 used together with the polycarboxylic acid.

3.PROPERTIES

ZEELCHEM™ 101 is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds. It can dissolve the oxidized materials on these metals’ surfaces. ZEELCHEM™ 101shows excellent scale and corrosion inhibition effects under temperature 250℃. HEDP has good chemical stability under high pH value, hard to 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).

ZEELCHEM™ 101 can react with metal ions in the water system to form the 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. Usually, ZEELCHEM™ 101 used together with the polycarboxylic acid. Acidity, Avoid contact with eye and skin, once contacted, flush with water. Acidity, Avoid contact with eye and skin, once contacted, flush with water.

4.SPECIFICATIONS

Appearance Colorless or light yellow transparent liquid
Ca Sequestration 525.0 mg/gm
Active content(HEDP)% 60.0 %
Phosphorous acid(as PO33-)% 1.0 max
Phosphoric acid (asPO4)% 0.6 max
Chloride (as Cl)% 0.01 max
pH(1% solution) 2.0 max
Density (20℃)g/cm3 1.43 to 1.47
Fe ion ppm 10.0 max
Acetic Acid 0.5% max

5.PACKAGE & STORAGE

HEDP liquid: Normally In 270.0 kg net HDPE Drum, 65.0 kg carboys can also be available as required. Acidity, Avoid contact with eye and skin, once contacted, flush with water.

6.SAFETY PROTECTION

Acidity, Avoid contact with eye and skin, once contacted, flush with water.