| Index name |
Limits for
grade А
(dense)
max
min |
Limits for
grade B
(light)
max
min |
| 1. Outward appearance |
White
granules |
White
granules |
White
powder |
White
powder |
| 2. Mass
percent of sodium carbonate (Na2CO3), min |
99,0 |
98,5 |
99,4 |
99,0 |
| 3. Mass
percent of sodium carbonate (Na2CO3) in calculation to
all non-calcined prod, min |
98,2 |
97,0 |
98,9 |
97,5 |
| 4. Mass
percent of calcination (270-300)°loss,
max |
0,8 |
1,5 |
0,5 |
1,5 |
| 5. Mass
percent of chlorides in calculation to NaCl,
max |
0,5 |
0,8 |
0,4 |
0,8 |
| 6. Mass
percent of iron in calculation to Fe2O3, max |
0,005 |
0,008 |
0,003 |
0,008 |
| 7. Mass
percent of substances insoluble in water, max
|
0,04 |
0,08 |
0,03 |
0,08 |
| 8. Mass
percent of sulphates in calculation to Na2SO4, max |
0,05 |
- |
0,04 |
- |
| 9. Bulk (apparent) density , g/cm³,
min |
0,9 |
0,9 |
- |
- |
10.
Particle Size. Using International Standard
Sieves.
- on 2.000 mm, max, %
- through
0.125 mm, max % |
5
15 |
5
25 |
- |
- | |
