Certificate of Analysis Product Menthol crystals Botanical name Mentha arvensis Appearance Colourless crystal Odour Refreshing, sharp, piercing, menthol Specific gravity 0.890 – 0.904 Optical rotation @ 20°C -48 to -51 Refractive index @ 20°C 1.438 – 1.456 Melting point 41 - 44°C Boiling point 212 to 216 Composition L-menthol 99.7% Solubility Soluble in alcohol; insoluble in water