Palmitic acid, white crystal at room temperature, insoluble in water, soluble in ether, chloroform, acetone and other organic solvents. Palmitic acid is one of the most widely distributed fatty acids in nature. It is widely present in various oils and fats in the form of glycerides, such as palm oil, lacquer oil, cottonseed oil, soybean oil, peanut oil, corn germ oil, fish oil, milk fat, fat of cattle, sheep, and pigs, etc.