 |
 |
 |
 |
 |
 |
 |
 |
SODIUM SALICYLATE IP/BP/USP C7H5O3Na (M.W. 160.10) |
| Chemical Name | Sodium Salt of Salicylic Acid. |
| Technical Information | White odourless crystals, scales or powder; becomes pinkish on long exposure to light.Aqueous solution slightly acidic, pH between 5-6. |
| Typical Analysis | |
| Description | Flakes - Colourless, Crystalline flakes. Powder - White powder. |
| Odour | Odourless or with a faint characteristic odour. |
| Reaction | A 10% w/v solution in water is neutral or acid to litmus. |
| Acidity | 2.0g dissolved in 50 ml of CO2 free water requires not more than 0.2 ml of 0.1N NaOH solution to produce a red colour.(indicator-10 drops of phenol red) |
| Clarity & Colour of Solution | Passes Test |
| Organic Volatile Impurities | Passes Test |
| Arsenic | 2 ppm (max) |
| Heavy Metals | 20 ppm (max) |
| Chloride | 200 ppm (max) |
| Sulphate | 600 ppm (max) |
| Sulphite or Thiosulphate | 1g of Sodium Salicylate dissolved in 20 ml of water and acidified with 1 ml of conc.HCl, the filtrate does not require more than 0.15 ml of 0.1N Iodine Solution. |
| Loss on drying | 0.5% (max) when dried at 105 oC |
| Assay | 99.0% to101% I.P/B.P., 99.5% to 100.5% U.S.P of C7H5O3Na calculated with reference to substance dried at 105 0C. |