| Parameter | Specification |
| Appearance | Fine, free-flowing powder |
| Color | Off-white to light beige |
| Odor | Characteristic pungent onion odor |
| Taste | Strong, characteristic onion flavor |
| Mesh Size | 80 to 100 mesh (varies by requirement) |
| Moisture Content | Max 6% to 8% |
| Bulk Density | 0.4 – 0.6 g/cm³ |
| Foreign Matter | Absent or within permissible limits |
| Ash Content | Max 5% |
| Volatile Oil Content | Typically 0.5% to 1% |
| Solubility | Partially soluble in water |
| Microbiological Status | As per food safety standards (low microbial load) |
| Shelf Life | 12 to 24 months when stored in cool, dry conditions |