PURIFIED SODIUM HYDROXIDE
Purified sodium
hydroxide is obtained through electrolysis of a solution of sodium chloride
using a mercury cathode.
Purified sodium
hydroxide is used to manufacture chemical threads and fibers, pure metals, and
in paper-and-pulp and in other industries.
It is manufactured in
accordance with GOST 11078-78 of two marks A and Б
|
Description of indices |
Norm for mark A Б |
|
|
Appearance |
Colorless transparent Liquid |
|
|
Fraction of total mass of sodium hydroxide (NaOH), % |
46.5 |
45.7 |
|
Fraction of total mass of sodium carbonate (Na2CO3), % |
0.04 |
0.20 |
|
Fraction of total mass of sodium chloride (NaCI), % |
0.03 |
0.0006 |
|
Fraction of total mass of sulfates (SO4), % |
0.002 |
0.005 |
|
Fraction of total mass of silicic acid (SiO2), % |
0.002 |
0.008 |
|
Fraction of total mass of iron (Fe2O3), % |
0.0004 |
0.001 |
|
Fraction of total mass of mercury (Hg), % |
0.00006 |
0.00009 |
|
Fraction of total mass of aluminum (Al2O3), % |
0.0004 |
0.003 |
|
Fraction of total mass of calcium (Ca), % |
0.0004 |
0.003 |
|
Fraction of total mass of barium (Ba), % |
0.00005 |
0.0001 |
|
Fraction of total mass of magnesium (Mg), % |
None |
0.0001 |
|
Fraction of total mass of manganese (Mn), % |
0.000002 |
0.00001 |
|
Fraction of total mass of copper (Cu), % |
None |
0.00001 |
|
Fraction of total mass of nickel (Ni), % |
None |
0.00004 |
|
Fraction of total mass of lead (Pb), % |
None |
0.00002 |
|
Fraction of total mass of sodium chlorate (NaCIO3), % |
0.00002 |
0.005 |
|
Coefficient of light transmission, % |
96 |
95 |
TECHNICAL
SODIUM HYDROXIDE
Technical sodium hydroxide is designed for chemical, petrochemical and paper-and-pulp industries, nonferrous metallurgy, and for other branches of the national economy.
It is manufactured in
accordance with GOST 2263-79 of mark РД.
|
Description
of indices |
Norm
for mark РД |
|
Appearance |
Colorless
or colored liquid |
|
Fraction of total mass of
sodium hydroxide, % |
48.0 |
|
Fraction of total mass of
sodium carbonate, % |
0.18 |
|
Fraction of total mass of
sodium chloride, % |
2.8 |
|
Fraction of total mass of iron
in terms of Fe2O3, % |
0.0003 |
|
Fraction of total mass of
sodium chlorate, % |
0.25 |
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