CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER D—DRUGS FOR HUMAN USE (parts 300 to 370) > PART 300—GENERAL > SUBPART C—Substances Generally Prohibited From Drugs (§300.100 to §300.100) > 300.100—Chlorofluorocarbon propellants.