Properies:light yellow oily liquid with cumin,unique aroma Relative density:0.9140-0.9340 Refractive index:1.4800-1.4960 Arsenic(As)%:≤0.0002 Heavy metal(pb dollars)%:≤0.001 Solubility:soluble in ethanol Content:anethole 50-60% small fennel ketone 10-20%