| Product | : | ALUMINIUM SULFATE x-hydrate (x= 14 / 16 /18) |
| Available Grades | : | LR, AR and ACS |
| Mol. Formula | : | Al2(SO4)3.xH2O |
| Mol. weight | : | 342.14 + 18.015x [x = degree of hydration = 14 /16 /18] |
|
CASR No. |
: |
16828-12-9 [14-hydrate] 16828-11-8 [16-hydrate] 7784-31-8 [18-hydrate] |
|
LR |
AR | ACS | |||
| 1. |
Appearance |
: |
White powder |
White powder |
White powder |
| 2. |
Test solution (10%w/v solution in dist. water) |
: |
The solution is clear and colourless |
The solution is clear and colourless |
The solution is clear and colourless |
| 3. |
Assay(as
labeled
hydrate) |
: |
98% min. |
99.5% min. |
98.0 - 102.0% |
| 4. |
pH (5%w/v solution in dist. water) |
: |
2.5
- 3.5 |
2.5
- 3.5 |
-- |
| 5. |
Maximum limits of impurities |
||||
| i. |
Water insoluble matter |
: |
-- |
0.01% |
0.01% |
| ii. |
Chloride, as Cl |
: |
0.005% |
0.001% |
0.005% |
| iii. |
Ammonium, as NH4 |
: |
0.05% |
0.01% |
-- |
| iv. |
Arsenic, as As |
: |
-- |
0.0003% |
-- |
| v. | Calcium,
as Ca |
: |
-- |
-- |
0.01% |
| vi. |
Copper, as Cu |
: |
-- |
0.0006% |
-- |
| vii. |
Heavy Metals, as Pb |
: |
0.005% |
0.001% |
0.001% |
| viii. |
Iron, as Fe |
: |
0.005% |
0.004% |
0.002% |
| ix. | Magnesium, as Mg |
: |
-- |
-- |
0.002% |
| x. |
Potassium, as K |
: |
-- |
0.005% |
0.005% |
| xi. |
Sodium, as Na |
: |
0.2% |
0.05% |
0.02% |
Specifications are subject to change
