Regulations last checked for updates: May 01, 2025

Title 40 - Protection of Environment last revised: Nov 01, 2025
Searching within: All TitlesTitle 40Chapter IPart 180Subpart C - Subpart C—Specific Tolerances
§ 180.331 - 4-(2,4-Dichlorophenoxy) butyric acid; tolerances for residues.

(a) General. Tolerances are established for residues of the herbicide 4-(2,4-dichlorophenoxy) butyric acid (2,4-DB), both free and conjugated, determined as the acid, in or on food commodities, as follows:

Commodity Parts per million
Alfalfa, forage0.7
Alfalfa, hay2.0
Cattle, meat byproducts0.05
Clover, forage0.2
Clover, hay0.2
Goat, meat byproducts0.05
Hog, meat byproducts0.05
Horse, meat byproducts0.05
Peanut0.2
Peppermint, tops0.2
Sheep, meat byproducts0.05
Soybean, forage0.7
Soybean, hay2.0
Soybean, seed0.5
Spearmint, tops0.2
Trefoil, forage0.7
Trefoil, hay2.0

(b) Section 18 emergency exemptions. [Reserved]

(c) Tolerances with regional registrations. [Reserved]

(d) Indirect or inadvertent residues. [Reserved]

[73 FR 54961, Sept. 24, 2008, as amended at 74 FR 46374, Sept. 9, 2009]
authority: 21 U.S.C. 321(q), 346a and 371
source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 180.331