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Water Treatment HEDP 2809-21-4

Items of Analysis Standard                     Analysis Result         
Appearance Clear, water-white to pale yellow solution Clear, water-white to pale yellow solution
Total Active Acid,% 58.0-62.0 60.05%
Phosphorous Acid (as PO33-), % 2.0 Maximum 1.35%
Phosphoric Acid (as PO43-), % 0.8 Maximum 0.68%
Chloride (as Cl-), % 1.0 Maximum <1.0%
Specific gravity (at 20℃) 1.41-1.46 1.436
pH, (1% solution 25℃) 1.0-2.0 1.75
Ca2+ Sequestration, (as CaCO3 mg/g ) 450 Minimum 520mg/g
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.
 

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