作业帮请问医用凡士林含有那些成分,是否对人体有伤害?请用英文告知具体含有那些成分?
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/15 08:54:45
请问医用凡士林含有那些成分,是否对人体有伤害?请用英文告知具体含有那些成分?
The substance consists of saturated hydrocarbons with carbon numbers mainly higher than 25.Its composition depends upon the petroleum source and refining process.Highly refined (White Petrolatum) grades are used in pharmacy and cosmetics.Less refined grades (Yellow,amber or brown Petrolatum) are used industrially and may contain impurities such as carcinogenic polycyclic aromatics.Therefore,the European Union applies the risk phrase R 45 (May cause cancer) with Note N to petrolatum.Note N reads ''the classification as a carcinogen need not apply if the full refining history is known and it can be shown that the substance from which it is produced is not a carcinogen.This note applies to certain complex oil-derived substances in Annex I''.