Water Treatment Scale Inhibitor HEDP 90% CAS 2809-21-4

• Customization: Available
• CAS No.: 2809-21-4
• Formula: C2h8o7p2
• Model NO.: HEDP 90%
• EINECS: 220-552-8
• Acid-Base Property: Neutral Surface Disposal Agent
• Certification: WQA, REACH
• Environmental Protection: Yes
• Color: White
• Appearance: Liquid
• Type: Industrial Circulating Water Treatment Agent
• Product: HEDP
• Solution: Clear, Colorless to Pale Yellow Aqueous
• Transport Package: 250kg Plastic Drum
• Specification: Active Matter(%) 50%/60%/89%/98%Min
• Trademark: ZXCHEM
• Origin: China
• HS Code: 2931900090
• Production Capacity: 50000mts/Year

Product Description

Water treatment scale inhibitor HEDP 90% cas 2809-21-4

HEDP(1-Hydroxy ethylidene-1, 1-diphosphonic acid)
CAS: 2809-21-4
HS CODE: 2931900090

 

Appearance: 
HEDP 60%: clear, colorless to pale yellow aqueous solution
HEDP 90%: white crystal powder

Characteristic:
1. HEDP 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. 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. 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.
2. 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.

Main indexes:

Index	HEDP 60%	HEDP 90%
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active content (HEDP) by wt %	58.0-62.0	90.0 min
Active content (HEDP·H2O) by wt %	-	98.0 min
Phosphorous acid (as PO3 ^3-) by wt %	2.0 max	0.8 max
Phosphoric acid (as PO4 ^3-) by wt %	0.8 max	0.5 max
Chloride (as Cl^-) by wt %	0.02 max	0.01 max
pH (1% water solution)	2.0 max	2.0 max
Density (20ºC) g/cm^3	1.40 min	-
Fe by mg/L	20.0 max	10.0 max
Ca sequestration by mg CaCO^3/g	500.0 min	-

 

Application

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.