brand ‘Improved’,
brand ‘Commercial’
The commercial sulfuric acid are manufactured in line with the requirements of GOST 2184 for the brands: improved and commercial (first-rate and second-rate).
Наименование показателя |
Standard |
||
Improved |
Commercial |
||
First grade |
Second grade |
||
Mass fraction of monohydrate, % |
92,5-94,0 |
no less than 92.5 |
|
Mass fraction of iron (Fe), %, no more than |
0,006 |
0,02 |
0,11 |
Mass fraction of residue after calcination, % no more th. |
0,02 |
0,05 |
No norms |
Mass fraction of nitrogen oxide (N2O3), %, no more than |
0,00005 |
No norms |
|
Mass fraction of arsenic (As), %, no more than |
0,00008 |
No norms |
|
Mass fraction of lead (Pb), %, no more than |
0,001 |
No norms |
|
Mass fraction of chlorides (Cl), %, no more than |
0,0001 |
No norms |
|
Color in cu cm of comparison solution, no more than |
1 |
6 |
|
Transparency |
transparent without dilution |
No norms |