| Customization: | Available |
|---|---|
| CAS No.: | 7778-80-5 |
| Formula: | K2so4 |
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Molecular formula: K2SO4| Item | Limit |
| Characters | Appearance : white or almost white, crystalline powder or colourless crystals |
| Solubility : soluble in water, practically insoluble in anhydrous ethanol. | |
| Identification |
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|
|
| Appearance | Solution S is clear and colourless |
| Acidity or Alkalinity | Not more than 0.5mL of 0.01M hydrochloric acid or 0.01M sodium hydroxide is required to change the colour of the indicator. |
| Chlorides | Not more than 40ppm |
| Calcium | Not more than 200ppm |
| Iron | Not more than 10ppm |
| Magnesium | Not more than 20ppm |
| Sodium | Not more than 0.10 per cent |
| Loss on drying | Not more than 1.0 per cent |
| Assay | 98.5 per cent to 101.0 per cent of K2SO4(dried substance) |
| Item | Limit |
| Characters | Appearance : white or almost white, crystalline powder or colourless crystals |
| Solubility : soluble in water, practically insoluble in anhydrous ethanol. | |
| Identification |
|
|
|
| Appearance | Solution S is clear and colourless |
| Acidity or Alkalinity | Not more than 0.5mL of 0.01M hydrochloric acid or 0.01M sodium hydroxide is required to change the colour of the indicator. |
| Chlorides | Not more than 40ppm |
| Calcium | Not more than 200ppm |
| Iron | Not more than 10ppm |
| Magnesium | Not more than 20ppm |
| Sodium | Not more than 0.10 per cent |
| Loss on drying | Not more than 1.0 per cent |
| Assay | 98.5 per cent to 101.0 per cent of K2SO4(dried substance) |
| Item | Limit |
| Characters | Appearance : white or almost white, crystalline powder or colourless crystals |
| Solubility : soluble in water, practically insoluble in anhydrous ethanol. | |
| Identification |
|
|
|
| Appearance | Solution S is clear and colourless |
| Acidity or Alkalinity | Not more than 0.5mL of 0.01M hydrochloric acid or 0.01M sodium hydroxide is required to change the colour of the indicator. |
| Chlorides | Not more than 40ppm |
| Calcium | Not more than 200ppm |
| Iron | Not more than 10ppm |
| Magnesium | Not more than 20ppm |
| Sodium | Not more than 0.10 per cent |
| Loss on drying | Not more than 1.0 per cent |
| Assay | 98.5 per cent to 101.0 per cent of K2SO4(dried substance) |
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