21 C.F.R. § 1230.13 Labeling of “poison”.
Title 21 - Food and Drugs
The following are styles of uncondensed Gothic capital letters 24-point (type face) size: When letters of not less than 24-point size are required on a label in stating the word “poison” they must not be smaller than those above set forth.
Title 21: Food and Drugs
PART 1230—REGULATIONS UNDER THE FEDERAL CAUSTIC POISON ACT
Subpart B—Labeling
§ 1230.13 Labeling of “poison”.