Tri-Basic Magnesium Phosphate
Grade | USP |
Acid-insoluble Substances | 0.2% Max. |
Identification | Positive to tests of Magnesium & Phosphates |
Description | White, amorphous powder; odourless or almost odourless. |
Water-Soluble Substances | 1.5% Max |
Solubility | Practically insoluble in water and in ethanol (95%). It dissolves in dilute hydrochloric acidandin nitric acid. |
Arsenic | 3 ppm Max |
Heavy Metals | Max. 0.003% (30ppm) |
Calcium | No Turbidity for 5 mins |
Dibasic and Magnesium oxide | 14.8 to 15.4 ml of 1 N hydrochloric acid |
Carbonate | No Effervescence |
Nitrates | Blue colour persists for 5 mins |
Barium | No Turbidity within 15 mins |
Lead | Max. 5 ppm |
Arsenic | Max. 3 ppm |
Chlorides | 0.14% Max. |
Sulphates | 0.6% Max. |
Loss on Ignition | 20.0% to 27.0% |
Assay as Mg3(PO4)2 | 98.0% to 101.5% |
Microbial Test | No E. Coli Present |