Properties: This product red-brown or green-brown clear liquid; a specific aroma gas, Weixin, tepid. Relative density: 0.955-0.983 Refractive index: 1.5052-1.5120 Specific Rotation: -66 ° - 40 ° Solubility: 208 Acid Value: 4 Ester value: 10 Solubility: soluble in organic solvents such as ethanol Content: patchouli alcohol for more than 26%