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------------------------------------------------------------------------Azodicarbonamide...................... For use as a blowing agent in
pol yethylene complying with
item 2.1 in Sec. 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- For use as a blowing agent in
6). polystyrene.Isopentane............................ For use as a blowing agent in
polystyrene.n-Pentane............................. Do.1,1,2,2-Tetra-chloroethylene.......... For 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 Sec.
176.170(c) of this chapter,
table 1, under Categories I,
II, VI, and VIII.Toluene............................... For use only as a blowing agent
adjuvant in polystyrene at a
level not to exceed 0.35
percent by weight of finished
foamed polystyrene.------------------------------------------------------------------------ [47 FR 22090, May 21, 1982, as amended at 58 FR 64895, Dec. 10, 1993]