A basic hydrated or a normal hydrated magnesium carbonate or a mixture of the two.
| Item | IP | USP | BP |
|---|---|---|---|
| Assay | Contain NLT 40% & NMT 45% of Mgo | NLT 40.0% & NMT 45.0% of Mgo | Contain NLT 40% & NMT 45% of Mgo |
| Identification | Positive | Positive | Positive |
| Color of solution | Passes the test | Passes the test | |
| Arsenic | 2PPM Max | 4PPM Max | 2PPM Max |
| Heavy Metals | 1PPM Max | 0.003%Max | 20PPM Max |
| Chloride | 0.1% Max | 700PPM Max | |
| Sulphate | 0.6% Max | 0.6% Max | |
| Calcium | 0.75% Max | 0.45% Max | 0.75% Max |
| Copper | Pass test | ||
| Iron | 400PPM Max | 0.02% Max | 400 PPM Max |
| Soluble substances | 1.0% Max | 1.0% Max | 1.0% Max |
| Substance insoluble in Acetic acid | 0.05% Max | 0.05% Max | 0.05% Max |
| Microbial limits | Passes test | ||
| Bulk density | 156g occupies approx. 30 ml volume | 0.25 gm/ml min | |
| Possible size distribution | Passes test | ||
| Bulk & Tapped density | Pass test |