An acid commonly obtained from benzoin, although it exists in various substances, as vegetable balsams, cinnamon, the urine of horses, cows, etc. It is usually procured from benzoin, either by sublimation, or by digesting the powdered benzoin in lime water, and afterwards separating the lime by the addition of muriatic acid. It crystallizes in fine silky filaments, of a white and shining appearance, and of a spec. grav. of 0.667; it is soluble in sulphuric and nitric acids, alcohol, oils, and tallow, but is only slightly soluble in water. It unites easily with the earthy and alkaline bases.