|
Premium
grade |
A.R. |
C.P. |
NH4Cl
,% 
|
99.8 |
99.5 |
98.5 |
| pH(50g/L solution),25¡æ |
4.5  5.5 |
| Clarity |
Pass
|
Pass |
Pass |
Water insoluble
substances ,%  |
0.002 |
0.005 |
0.01 |
| Residue on ignition,%
|
0.005 |
0.02 |
0.05 |
| Sulfate(SO4),%
|
0.002 |
0.005 |
0.005 |
| Phosphate (PO4),%
|
0.0002 |
0.0005 |
0.001 |
| Na ,% |
0.005 |
0.005 |
-- |
| Mg ,% |
0.0005 |
0.001 |
0.002 |
| K ,% |
0.005 |
0.005 |
-- |
| Ca ,% |
0.0005 |
0.001 |
0.002 |
| Fe ,% |
0.0002 |
0.0005 |
0.001 |
| Ni,% |
0.0001 |
-- |
-- |
| Cu ,% |
0.0002 |
-- |
-- |
| Zn ,% |
0.0002 |
-- |
-- |
| Pb ,% |
0.0001 |
-- |
-- |
|
