§558.254. Famphur.
21 C.F.R. § 558.254
Specifications. Type A medicated articles containing 13.2 or 33.3 percent famphur.
Sponsor. See No. 000061 in § 510.600(c) of this chapter.
Related tolerances. See § 556.273 of this chapter.
Special considerations. Famphur is a cholinesterase inhibitor. Do not use this product in animals simultaneously or within a few days before or after treatment with or exposure to cholinesterase-inhibiting drugs, pesticides, or chemicals.
Conditions of use. It is used in cattle feed as follows:
Notes, amendments, and revision history
Amendments
[84 FR 39185, Aug. 9, 2019, as amended at 87 FR 17947, Mar. 29, 2022]
Authority
Authority: 21 U.S.C. 354, 360b, 360ccc, 360ccc-1, 371.
Source
Source: 40 FR 13959, Mar. 27, 1975, unless otherwise noted.
Amendments
[84 FR 39185, Aug. 9, 2019, as amended at 87 FR 17947, Mar. 29, 2022]