Sodium hydroxide liquid (Caustic soda) purified grade GOST 11078-78
Specifications
|
indicator |
Grade A |
Grade B |
|---|---|---|
|
Outward appearance |
Colorless transparent liquid |
|
|
Mass fraction of sodium hydroxide , %, not less |
46 |
45 |
|
Mass for sodium carbonate,% , no more |
0.15 |
0,2 |
|
Mass fraction of sodium chloride , %, not more |
0.007 |
0.01 |
|
Mass fraction of sulphate (SO4),%, not more |
|
|
|
Mass fraction of silica (SiO2),%, no more than |
|
|
|
Mass fraction of iron in terms of Fe2O3,%, no more than |
0,007 |
0,02 |
|
Mass fraction of mercury (Hg),%, not more |
0,00007 |
0,00009 |
|
Mass fraction of alumina (Al2O3),%, not more |
0.002 |
0.003 |
|
Mass fraction of calcium (Ca),%, not more |
0,0014 |
0,0014 |
|
Mass fraction of barium (Ba),%, not more |
0.0001 |
0.0001 |
|
Mass fraction of magnesium (Mg),%, no more than |
0,0001 |
0,0001 |
|
Mass fraction of manganese (Mn),%, not more |
0.00001 |
0.00001 |
|
The mass ratio of copper (Cu),%, no more than |
0,00001 |
0,00001 |
|
Mass fraction of nickel (Ni),%, not more |
0.00001 |
0.00004 |
|
Mass fraction of lead (Pb),%, not more |
0,00002 |
0,00002 |
|
Mass fraction of sodium chlorate , %, not more |
0,25 |
0,3 |
|
Transmittance , % not less |
93 |
90 |