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Potassium citrate (also known as tripotassium citrate) is a potassium salt of citric acid with the molecular formula C6H5K3O7. It is a white, hygroscopic crystalline powder. It is odorless with a saline taste. It contains 38.3% potassium by mass. In the monohydrate form it is highly hygroscopic and deliquescent.
| Product Name | POTASSIUM CITRATE MONOHYDRATE IP/BP/EP/USP |
| Synonym | TRI POTASSIUM CITRATE IP/BP/EP/USP |
| Product Code | POTA08-1 |
| Chemical Formula | C6H5K3O7.H2O |
| Molecular Weight | 324.41 g/mol-1 |
| CAS No. | 6100-05-6 |
| Standard Pack Size | 25 KG |
| Storage | Store in cool and dry place. |
| Retest Period | 1 YEAR |
| Application |
| Sr. No. | Test | Specifications | Reference |
| 1. | Description | White, granular crystals or a crystalline powder; odourless; hygroscopic. | IP/BP/EP/USP |
| 2. | Solubility | Freely soluble in water; almost in-soluble in alcohol | IP/BP/EP/USP |
| 3. | Identification | (A) Reactions of ‘Potassium salts’. (B) Reactions of ‘Citrates’ | IP/BP/EP/USP |
| 4. | Appearance of Solution | Solution A is clear and colourless. | IP/BP/EP |
| 5. | Acidity or alkalinity | (A) Not more than 0.2 ml of 0.1 M hydrochloric acid or 0.1 M sodium hydroxide is required to change the colour of the solution. (B) No pink colour is produced after addition of Phenolphthalein. | (A) IP/BP/EP (B) USP |
| 6. | Arsenic | Not more than 2 ppm. | IP/BP/EP |
| 7. | Heavy Metals | Not more than 10 ppm | IP/BP/EP |
| 8. | Sodium | Not more than 0.3% w/w. | IP/BP/EP |
| 9. | Chlorides | Not more than 50 ppm. | IP/BP/EP |
| 10. | Oxalate | Not more than 300 ppm. | IP/BP/EP |
| 11. | Sulphates | Not more than 150 ppm. | IP/BP/EP |
| 12. | Tartrate | No crystalline precipitate is formed. | USP |
| 13. | Readily Carbonisable Substances | The solution is not more intensely coloured than reference solution YS2 or GYS2. | IP/BP/EP/USP |
| 14. | Water | Between 4.0% w/w to 7.0% w/w determined on 0.5 g | IP/BP/EP |
| 15. | Loss on Drying | Between 3.0% w/w and 6.0% w/w, at 180 °C for 4 hours. | USP |
| 16. | Assay | (A) Not less than 99.0% w/w and not more than 101.0% w/w of C6H5K3O7, calculated on the anhydrous basisNot less than 99.0% w/w and not more than 101.0% w/w of C6H5K3O7, calculated on the anhydrous basis. (B) Not less than 99.0% w/w and not more than 100.5% w/w C6H5K3O7, on the dried basis. | (A) IP/BP/EP (B) USP |
| 17. | Bulk Density | Between 0.9 g/ml to 1.1 g/ml | IHS |
| 18. | Tap Density | Between 1.2 g/ml to 1.4 g/ml | IHS |
| 19. | Sieve Analysis (A) (-) 20# (B) (-) 40# | (A) 100.00% w/w. (B) NLT 50.00% w/w. | IHS |