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,
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 |
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，mg/L |
35.0
max |
20 max |
| Moisture，% |
15 max |
-- |
| density (20℃)g/cm3 |
-- |
1.26-1.36 |
| PH |
10.5-12.0
(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.
Keywords:
HEDP·Na4 China,Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
