21 C.F.R. § 178.3010

Current through October 31, 2024
Section 178.3010 - Adjuvant substances used in the manufacture of foamed plastics

The following substances may be safely used as adjuvants in the manufacture of foamed plastics intended for use in contact with food, subject to any prescribed limitations:

List of substances Limitations
AzodicarbonamideFor use as a blowing agent in polyethylene complying with item 2.1 in § 177.1520(c) of this chapter at a level not to exceed 5 percent by weight of finished foamed polyethylene.
1,1-Difluoroethane (CAS Reg. No. 75-37-6)For use as a blowing agent in polystyrene.
IsopentaneFor use as a blowing agent in polystyrene.
n-PentaneDo.
1,1,2,2-Tetra-chloroethyleneFor use only as a blowing agent adjuvant in polystyrene at a level not to exceed 0.3 percent by weight of finished foamed polystyrene intended for use in contact with food only of the types identified in § 176.170(c) of this chapter, table 1, under Categories I, II, VI, and VIII.
TolueneFor use only as a blowing agent adjuvant in polystyrene at a level not to exceed 0.35 percent by weight of finished foamed polystyrene.

21 C.F.R. §178.3010

47 FR 22090, May 21, 1982, as amended at 58 FR 64895, Dec. 10, 1993