(NaPO3)n with
Na2O/P2O5 mole ratio between 1 and 1.3.
Depending on this ratio, two grades of glassy Sodium Hexameta Phosphate
are produced:
Grade I with minimum P2O5 of 67%
Grade II with minimum P2O5 of 62%
Specifications
SL.No. Characteristic Tech.Grade I Tech.Grade II
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1) Matter insoluble in water, 0.20 0.50
% by mass, MAX
2) Soluble Iron compounds(as Fe), 0.03 0.03
% by mass, MAX
3) Phosphates(as P2O5), 67.0 62.0
% by mass, MIN
4) Loss on Ignition 3.0 3.0
% by mass, MAX
5) Orthophosphate Content 1.5 1.5
% by mass, MAX
6) Sequestering Power Passes Soap Lather Stability
test with calculated hardness.
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Packing
Packed in 50 kgs HDPE polyethene lined bags in the form of small broken glass like powdered particles.
Uses
Sodium Hexameta Phosphate is a water soluble glass of Sodium Phosphate
which is also known as Graham's Salt. Sodium Hexameta Phosphate has a
property of "SEQUESTRATION" due to which it forms soluble complex ions
with salts of Calcium, Magnesium, Zinc, Iron, etc., thus preventing
deposition of their insoluble salts. By virtue of this property
Sodium Hexameta Phosphate is an excellent water softner and used
in wide applications.
Typical uses for Sodium Hexameta Phosphate are :
It finds use in boiler water where it prevents deposition of Calcium and Magnesium salts on boiler tubes.
In case of soaps, it not only prevents the precipitation of soap as Calcium salt (Calcium Soap) but actually dissolves such soap. It has therefore, found important function of removing Calcium Soap which otherwise encrusts the washed textiles.
It is extensively used in process water, industrial water and cooling water for softening of water.
It is also used as dispersant in paper industry, as deflocculating agent in petroleum industry and as coagulation agent in lather tanning.
