(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt

Corrosion and Scale Inhibitor

WTA-038

3794-83-0

(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt

WTA-038

Na4HEDP; HEDPoNa4; deflocen43; turpinal4nl; dequest2016; Sodium HEDP; tetrasodiumetidronate

tetrasodium;1,1-diphosphonatoethanol

294

C2H4O7P2Na4

CC(O)(P(=O)([O-])[O-])P(=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+]

InChI=1S/C2H8O7P2.4Na/c1-2(3,10(4,5)6)11(7,8)9;;;;/h3H,1H3,(H2,4,5,6)(H2,7,8,9);;;;/q;4*+1/p-4

KWXLCDNSEHTOCB-UHFFFAOYSA-J

578.8°C at 760mmHg

198-199°C

303.8°C

79%

1.26-1.36 g/mL

223-267-7

HEDP·Na4 is the sodium salt of HEDP, which is an excellent scale inhibitor for calcium carbonate. It is mainly used in low pressure boiler water system, circulating water system, industrial and municipal cleaning water system and swimming pool. The solid HEDP·Na4 is white powder, soluble in water, easily deliquescence, suitable for use in cold and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor, can form stable complex with Fe, Cu and Zn ions, can dissolve the oxides on metal surface. It has good scale and corrosion inhibition effect even under 250°C. HEDP·Na4 is widely used in circulating cooling water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc. In light woven industry, HEDP·Na4 is used as detergent for metal and nonmetal. In dyeing industry, HEDP·Na4 is used as peroxide stabilizer and dye-fixing agent. In non-cyanide electroplating, HEDP·Na4 is used as chelating agent.

Storage in shady room and dry place.

10.0-12.0; 11.0-12.0

Colorless to yellowish transparent liquid; White powder

HEDP·Na4 is an good scale inhibitor for calcium carbonate, HEDP·Na4 can be used in low pressure boiler water system.

Weak acidity, Avoid contact with eye and skin, once contacted, flush with water.

20.0 max; 35.0 max

9.0 max

20.3-21.7; 60.0 min