40 C.F.R. § 180.1220
1-Methylcyclopropene; exemption from the requirement of a tolerance.
Cite as 40 C.F.R. § 180.1220 (2026)
An exemption from the requirement of a tolerance is established for residues of the 1-Methylcyclopropene in or on fruits and vegetables when: (a) Used as a post harvest plant growth regulator, i.e. , for the purpose of inhibiting the effects of ethylene. (b) Applied or used outdoors for pre-harvest treatments. [73 FR 19150, Apr. 9, 2008]