CAS No. 29329-71-3 (x-Na), 3794-83-0
(4-Na) Synonyms: Tetrasodium etidronate
Molecular Formula: C2H4O7P2Na4
Molecular weight: 294
Structural Formula:
Properties:
HEDP•Na4
is the sodium salt of
HEDP,
HEDP•Na4
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℃.
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 |
Colorless to yellowish transparent liquid |
White
powder |
| Active content (HEDP)% |
20.3-21.7 |
60.0
min |
| Active content (HEDP•Na4)% |
29.0-31.0 |
85.0
min |
| Total phosphoric
acid (as PO43-)
% |
18.4-20.4 |
55.0 min |
| Fe, mg/L |
20.0
max |
35.0
max |
| Moisture，% |
-- |
9.0
max |
| Density (20℃)g/cm3 |
1.26-1.36 |
-- |
| PH (1% water solution) |
10.0-12.0 |
11.0-12.0 |
Package and Storage:
Liquid: 200L plastic drum, IBC(1000L), customers' requirement.
Solid: 25kg/bag, customers' requirement. Storage for ten months in shady room and dry place.
Safety Protection:
Weak acidity, Avoid contact with eye and
skin, once contacted, flush with water.
Synonyms:
Tetrasodium (1-hydroxyethylidene)bisphosphonate
