| Active Ingredients | ≥5% Rosmarinic Acid (standardized) | HPLC | Main bioactive compound |
| Appearance | Fine Powder / Granules | Visual | Uniform, free-flowing, no lumps |
| Moisture Content | ≤8% | Loss on Drying / Karl Fischer | Ensures stability and shelf life |
| Total Ash | ≤5% | AOAC | Total mineral content |
| Acid-insoluble Ash | ≤1% | AOAC | Quality indicator for silica content |
| Particle Size | 80 mesh | Laser Diffraction | Suitable for industrial & food formulations |
| Bulk Density | 0.35–0.50 g/cm³ | USP | Ensures consistent formulation |
| Tapped Density | 0.45–0.60 g/cm³ | USP | Flow property for processing |
| pH (1% solution) | 4.5–6.0 | pH meter | Slightly acidic |
| Solvent Residue (Ethanol) | ≤5000 ppm | GC | Compliant with USP <467> |
| Heavy Metals | Pb ≤2 ppm, Cd ≤1 ppm, As ≤1 ppm, Hg ≤0.1 ppm | ICP-MS | Meets global food safety standards |
| Microbial Limits | Total Plate Count ≤1000 CFU/g, Yeast & Mold ≤100 CFU/g, E. coli & Salmonella: Not Detected | AOAC / USP | Suitable for food grade applications |
| Pesticide Residues | Compliant with EU & USP limits | GC-MS | Optional testing for exports |
| Loss on Drying (LOD) | ≤8% | USP | Confirms moisture stability |
| Extract Ratio (Plant: Extract) | 10:1 | — | Standardized extraction |
| Specific Rotation | -5° to +5° | Polarimeter | Indicative of optical purity |
| Stability | Stable under recommended storage | — | Shelf life 24 months |
| Solubility Profile | Completely soluble in water, ethanol, glycerin; partially soluble in oils | — | Facilitates multiple formulations |
| Color Stability | Retains color under normal storage, minimal degradation | Visual | Important for beverages & cosmetics |