| Appearance | Fine, white, odorless, tasteless, bulky powder, free from grittiness |
| Assay (as BaSO4) | 97.5 -100.5% |
| Solubility | Practically insoluble in water, in organic solvents, and in solutions of acids and of alkalies |
| Identifications | To comply IP, BP, USP tests |
| Acidity or alkalinity | To comply IP, BP tests |
| pH (10% w/w solution) | 3.5 –10.0 |
| Acid soluble matter | Max 0.3% |
| Oxidisable sulfur compounds | To comply BP test |
| Soluble barium salts | Max 0.001% (to comply IP test) |
| Phosphate (PO4) | To comply IP tests |
| Heavy metal (as Pb) | Max 0.001% |
| Sulphide (S) | Max 0.5 µg/g (to comply IP test) |
| Arsenic (As) | Max 0.0002% |
| Loss on ignition (at 600 ± 50°C) | Max 2.0 % |
| Bulkiness | To comply IP tests |
