Physical and chemical properties: Isoamyl alcohol is also known as “3-methylbutanol”. It is one of the aroma components of fresh tea leaves, black tea and green tea. The chromatographic peak area of ​​aroma components is: 2.07% for fresh leaves and 1.44% for black tea. Green tea contains 13.0ppm. It is a colorless liquid with an alcohol smell, and its vapor is toxic. Melting point -117℃, specific gravity Chemicalbook 0.8092, refractive index n15D 1.4085, boiling point 132℃. It is slightly soluble in water and miscible with ethanol and ether. It is obtained by fractionation of mixed alcohols generated by chlorination and hydrolysis of fusel oil or pentane. Isoamyl alcohol can be used as a solvent and a flotation agent for non-ferrous metal minerals, and is also used in the preparation of drugs and photographic drugs.