CASR |
: | 7778-80-5 |
Molecular Formula |
: | K2SO4 |
Molecular Weight |
: | 174.25 |
| Specifications | |
|---|---|
| Description: | white crystalline powder. |
| Solubility: | Soluble in water, insoluble in alcohol. |
| Identification (Reaction of sulfates): | A white precipitate should form. |
| Identification (Potassium): | A white precipitate is form. |
| Appearance of solution: | Clear and colourless solution |
| pH(5% w/v in water): | 5.5-8.5 |
| Acidity & alkalinity: | NMT 0.5 mL of 0.01 M hydrochloric acid or 0.01 M sodium hydroxide is required to change the colour of the indicator |
| Chloride (Cl): | NMT 0.0040 % |
| Heavy metals (as Pb): | NMT 0.0010 % |
| Arsenic (As): | NMT 0.0002 % |
| Calcium (Ca): | NMT 0.0200 % |
| Iron (Fe): | NMT 0.0010 % |
| Mercury(Hg): | NMT 0.0001 % |
| Magnesium (Mg): | NMT 0.0020 % |
| Sodium (Na): | NMT 0.01 % |
| Sodium (Na): | No persistent yellow color develops |
| Lead (Pb): | NMT 0.0002 % |
| Selenium (Se): | NMT 0.0030 % |
| Loss on drying at 130°C: | NMT 1.0 % |
| Assay (Alkalimetric): | NLT 99.0 % |
| Assay (alkalimetric, calculated on dried substance): | 99.0 - 101.0 % |
