石蜡（paraffin）

石蜡是从石油、页岩油或其他沥青矿物油的某些馏出物中提取出来的一种烃类混合物，主要成分是固体烷烃，无臭无味，为白色或淡黄色半透明固体。石蜡是非晶体，但具有明显的晶体结构。另有人造石蜡。

石蜡是石油加工产品的一种，是矿物蜡的一种，也是石油蜡的一种。它是从原油蒸馏所得的润滑油馏分经溶剂精制、溶剂脱蜡或经蜡冷冻结晶、压榨脱蜡制得蜡膏，再经溶剂脱油、精制而得的片状或针状结晶。用于制高级脂肪酸、高级醇、火柴、蜡烛、防水剂、软膏、电绝缘材料等 ^[1]  。

石蜡分食品级（食品级和包装级，前者优）和工业级，食品级无毒，工业级不可食用。

Paraffin wax from oil, mineral oil shale oil or other asphalt extracted in some of the distillate of a mixture of hydrocarbons, the main ingredient is a solid paraffin, odourless tasteless, white or pale yellow transparent solid. Paraffin wax is amorphous but has a distinct crystalline structure. And artificial paraffin wax.

Paraffin is a kind of petroleum processing product, a kind of mineral wax, also a kind of petroleum wax. It comes from crude oil distillation of the proceeds of the lubricating oil fractions by solvent refining, solvent dewaxing or by freezing crystallization, squeezing out of wax wax cerate, then through solvent deoiling, refined flake or needle crystal. Used for making high grade fatty acids, high grade alcohols, matches, candles, water-repellent agents, ointments, electrical insulation materials, etc. [1].

Paraffin wax is classified into food grade (food grade and packaging grade, the former is superior) and industrial grade, food grade is non-toxic, and industrial grade is not edible.