Hydroxyethylidene Diphosphonic Acid By S. N. Chemicals

Hydroxyethylidene Diphosphonic AcidHEDP And Solution Hedp 60% and 50% solution 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.  test  limits ob ser v ation active contknt% 60. 0% min 60. 3% passes chloride (as c1) % 1% max 0. 1% passes1% max   0. 1% passes density (20 c) g/cm 1. 43 to 1. 46 1. 43 to 1. 46 1. 452 passes ph value (1% sol) 2. 0 max. 2. 0 max 1. 8 passes iron(fe) 20 ppm max. 4. 0ppm passes 20 ppm max 4. 0 ppm passes chelation value mg 520 min   passes cacao   remarks  complies as per specification