| Appearance | Fine, free-flowing powder |
| Color | Light red to reddish-brown |
| Odor | Characteristic pungent onion aroma |
| Taste | Strong, pungent, typical of red onion |
| Particle Size | 80–100 mesh |
| Moisture Content | ≤ 6% |
| Bulk Density | 0.4 – 0.6 g/cm³ |
| Foreign Matter | Absent |
| Ash Content | ≤ 5% |
| pH (1% Solution) | 5.0 – 6.5 |
| Solubility | Partially soluble in water |
| Storage Conditions | Cool, dry place away from moisture and direct light |
| Shelf Life | 12 – 24 months (if stored properly) |
| Packaging | Food-grade, airtight, moisture-resistant packaging |