Diphosphonic acid, (1-hydroxyethylidene)-,tetrasodium salt (HEDPNa4)

Diphosphonic acid, (1-hydroxyethylidene)-,tetrasodium salt (HEDPNa4) CAS No.:3794-83-0 Molecular Formula:C2H4Na4O7P2 56% min

Diphosphonic acid, (1-hydroxyethylidene)-,tetrasodium salt (HEDPNa4)CAS No.:3794-83-0Molecular Formula:C2H4Na4O7P2

Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na4)

CAS No. 29329-71-3 (x-Na), 3794-83-0 (4-Na)

Molecular Formula: C2H4O7P2Na4                     Molecular weight: 294

Structural Formula:

 

Properties:

HEDP.Na4 is the sodium salt of HEDP, it is an good scale inhibitor for calcium carbonate, it can be 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 winter and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor, can form stable complex with Fe, Cu and Zn ions, it can dissolve the oxides on metal surface, it has good scale and corrosion inhibition effect under 250°C.

HEDP•Na4 is widely used in circulating cool 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. 

Specification:

items	index
Appearance	White powder	Colorless to light yellow transparent liquid
Active component (HEDP)%	56.0 min	20.3-21.7
Active component (HEDP•Na4)%	79.9 min	29.0-31.0
Total phosphoric acid (as PO43-) %	52.0-54.0	18.4-20.4
Fe ppm	35.0 max	20 max
Dry weight loss %	15 max	--
density (20°C)g/cm3	--	1.26-1.36
PH	11.0-12.0 (1% water solution)	10.0-12.0 (as it)

Package and Storage:

For liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required. For solid: inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in room shady and dry place.

Safety Protection:

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

Diphosphonic acid, (1-hydroxyethylidene)-,tetrasodium salt (HEDPNa4)