| Property | Specification |
| Appearance | Small, oval, green to yellowish-brown seeds |
| Color | Green to yellowish-brown |
| Odor | Sweet, aromatic, licorice-like |
| Taste | Sweet, mildly spicy, and licorice-like |
| Form | Whole seeds, powdered form |
| Moisture Content | 8-10% |
| Particle Size | 60-80 mesh (for powdered fennel seeds) |
| Bulk Density | 0.55-0.65 g/cm³ |
| Solubility | Partially soluble in water |
| pH (of aqueous solution) | 5.5-6.5 |
| Specific Gravity | 0.65-0.75 |