1.Chemical name: 1-Hydroxyethylidene-1, 1-Diphosphonic Acid HEDP
2.Abbreviation: HEDP
3.Molecular Formula: C2H8O7P2
4.Molecular Weight: 206
5.CAS NO 2809-21-4
   HS Code 2931901990

6.Specifications:
Appearance: colorless transparent liquid
Active ingredient: 58.0 to 62.0%
Phosphorous acid (as PO 3 ) 2.5% max.
Phosphoric acid (as PO 4 ) 0.7%max.
Iron(ppm) 35 mg/L
Chloride(cl) 0.5%max.100ppm max
Density (20C) g/cm 3 1.39-1.49
PH (1% water solution) 2.0 max.
calcium sequestation mgcaco3/g 500mg/g

7 Application:

1) A scale and synergistic corrosion inhibitor for iron rust and mineral scale from pipes of cooling circulation water units and boilers;
2) Metal chelate agent for color fixing and bleaching in textile;
3) Complexing agent for electron plate and scale cleaning agent for metals.
4) Recommended Uses: Cooling water treatment, boiler treatment, I & I cleaners, swimming pool stain prevention, metal ion control.

8 Packaging and storage:
in 250kgs/plastic drum.
Acidity, Avoid contact with eye and skin, once contacted, flush with water

9 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.