Menthol is extracted from peppermint, which is also known as Mentha piperita, brandy mint, and lamb mint. Menthol has been used for liver and gallbladder complaints, loss of appetite, nausea, vomiting, respiratory infections, menstrual cramps, toothache, the common cold, cough, and fever. Topically, Menthol has been used for muscle and nerve pain and as an antiseptic. Menthol crystal specification as below Product name: Natural methol crystal Appearance: colorless crystal or white powdery Odor with sepcail of peppermint, first heat then cool Melting point: 42 °c~44 °c Specific rotation: -49~+50