Regulations last checked for updates: Oct 02, 2026

Title 40 - Protection of Environment last revised: Sep 29, 2026
§ 180.491 - Propylene oxide; tolerances for residues.

(a) General. Tolerances are established for residues of the fumigant propylene oxide, including its metabolites and its degradates, including the reaction products propylene chlorohydrin and propylene bromohydrin, in or on the commodities in table 1 to this paragraph (a). Compliance with the tolerance levels specified in table 1 to this paragraph (a) is to be determined by measuring only propylene oxide in or on the commodity.

Table 1 to Paragraph (a)

Commodity Parts per
million
Cacao bean, cocoa powder200
Cacao bean, dried bean200
Fig, dried3
Garlic, dried300
Ginger, dried300
Grape, raisin1
Herbs and spices, group 19, dried300
Nut, tree, group 14-12300
Onion, dried300
Pepper, bell, dried300
Pepper, nonbell, dried300
Plum, prune, dried2
Sesame, seed300
Turmeric, roots, dried300

(b) Section 18 emergency exemptions. [Reserved]

(c) Tolerances with regional registrations. [Reserved]

(d) Indirect or inadvertent residues. [Reserved]

[65 FR 33702, May 24, 2000, as amended at 68 FR 39430, July 1, 2003; 72 FR 49651, Aug. 29, 2007; 73 FR 54963, Sept. 24, 2008; 76 FR 38037, June 29, 2011; 77 FR 28495, May 15, 2012; 91 FR 21389, Apr. 22, 2026; 91 FR 31962, May 29, 2026]
authority: 21 U.S.C. 321(q), 346a and 371
source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 180.491