Stearic acid 181:

It is a kind of high-grade saturated fatty acid, and the pure product is white soft pieces with luster. The relative density is .948(2℃), the melting point is 69~7℃, the boiling point is 383℃, and the refractive index is 1.4299(8℃). The industrial product is white or yellowish granular, which is a mixture of stearic acid and palmitic acid, and contains a small amount of oleic acid with a slight butter-like smell. Very slightly soluble in cold water, easily soluble in benzene, toluene, chloroform, carbon tetrachloride, carbon disulfide, amyl acetate, etc., but also soluble in ethanol and acetone.

Stearic acid 181:

Stearic acid is a mixture of stearic acid and palmitic acid, an animal fat with a tertiary acid of carbon 18, and contains a small amount of oleic acid, with a slight butter-like smell. Very slightly soluble in cold water, easily soluble in benzene, toluene, chloroform, carbon tetrachloride, carbon disulfide, amyl acetate, etc., but also soluble in ethanol and acetone.