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title 21
Food and Drugs
chapter I-i4
CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED)
part 331
PART 331—ANTACID PRODUCTS FOR OVER-THE-COUNTER (OTC) HUMAN USE
subpart C
Subpart C—Testing Procedures
Subpart C. Subpart C—Testing Procedures
§ 331.20 - Determination of percent contribution of active ingredients.
§ 331.21 - Test modifications.
