StacksVerified U.S. regulatory reference

27 CFR §21.121

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Specific gravity at 25 °C. 0.890 to 0.910.
  2. (b)Refractive index at 20 °C. 1.455 to 1.465.
  3. (c)Esters as menthyl acetate. 5 percent minimum.
  4. (d)Menthol (free and esters). 5 percent minimum.