Vaseline is a semi-liquid mixture of alkanes or saturated hydrocarbons, also known as petrolatum, which is obtained by fractional distillation of petroleum. Its state is between solid and liquid at room temperature, and there are three colors of brown, yellow and white due to different uses. Natural petroleum jelly is derived from petroleum residual oil concentrates such as paraffinic heavy oil; artificial petroleum jelly is derived from a mixture of mineral oil thickened with pure ceresin, paraffin and paraffin grease. Vaseline has a smell of mineral oil, but no kero sene. Can be used as raw materials for medicines and cosmetics, and also for machine lubrication.