发布单位：FDA
发布文号：21 CFR PART 178
发布日期：暂无
生效日期：暂无
有效性状态： 
废止日期：暂无
备注：在符合本节（a）（b）规定的条件下，四氢呋喃可安全的用于制作食品包装，运输或储存中所用到的加工制品。（a）氯乙烯、乙酸乙烯酯或二氯乙烯经单体聚合或三种单体毫无规律的共聚形成高分子树脂溶液，在溶液流延成薄膜时四氢呋喃用作溶剂，或符合本章177.1980中所规定的氯乙烯共聚物流延成薄膜时四氢呋喃用做溶剂。（b）薄膜中四氢呋喃的残留量不得超过薄膜重量的1.5%。
§178.3950 Tetrahydrofuran
Tetrahydrofuran may be safely used in the fabrication of articles intended for packaging, transporting, or storing foods, subject to the provisions of this section.
（a） It is used as a solvent in the casting of film from a solution of polymeric resins of vinyl chloride, vinyl acetate, or vinylidene chloride that have been polymerized singly or copolymerized with one another in any combination, or it may be used as a solvent in the casting of film prepared from vinyl chloride copolymers complying with § 177.1980 of this chapter.
（b） The residual amount of tetrahydrofuran in the film does not exceed 1.5 percent by weight of film.
