| Other: |
Molecular weight: 119.01
Physicochemical properties: white crystal, odorless, salty and slightly bitter, specific gravity 2.75 (25℃), melting point 734℃, boiling point 1435℃, soluble in water and glycerin, insoluble in alcohol and ether, slightly deliquescent, aqueous solution Neutral.
Uses: Used in the manufacture of photographic film developer, film thickener, color photo bleach. It is used as a nerve tranquilizer in medicine. It is also used in the manufacture of special soaps, engravings and lithographic printing, Industrial synthesis of crystal making.
| Item |
Index |
| Photographic Grade |
Pharmaceutical Grade |
| Content %≥ |
99.5 |
99.5 |
| Water insoluble matter %≤ |
0.005 |
0.01 |
| Chloride (Cl) %≤ |
0.2 |
0.5 |
| Iodide (I)% |
0.05 |
0.01 |
| Bromate (BrO32-) %≤ |
0.001 |
0.003 |
| Barium (Ba) %≤ |
0.0002 |
0.002 |
| Calcium (Ca) %≤ |
0.0001 |
0.001 |
| Magnesium (Mg) %≤ |
0.0001 |
0.001 |
| Sodium (Na) %≤ |
0.005 |
0.005 |
| Total nitrogen (N) %≤ |
0.0005 |
0.0005 |
| Bismuth (Bi) %≤ |
0.0002 |
0.0005 |
| Sulfate (SO42- ) %≤ |
0.002 |
0.005 |
| Iron (Fe) %≤ |
0.00005 |
0.0001 |
| Copper (Cu) %≤ |
0.0005 |
0.002 |
| Heavy metal (Pb) %≤ |
0.00002 |
0.00005 |
| PH value (15% aqueous solution / 25℃) |
6-7.5 |
6-7.5 |
|
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