1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid / HEDP

• CAS No.: 2809-21-4
• Acid-Base Property: Acidic Surface Disposal Agent
• Environmental Protection: Yes
• Color: Pale Yellow
• Appearance: Liquid
• Type: Corrosion Inhibitors
• Model NO.: 60%
• Transport Package: 250kgs/Drum
• Specification: 60%
• Origin: China

Product Description

CAS No.  2809-21-4   
EINECS: 220-552-8       
Molecular weight:  206.02
Molecular Formula:  C2H8O7P2             
Properties:
HEDP is an organophsphoric 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. HEDP shows excellent scale and corrosion inhibition effects under temperature 250ºC. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. 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.
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.
Storage for ten months in shady and dry place.
Safety Protection:
Acidity, Avoid contact with eye and skin, once contacted, flush with water.