21 C.F.R. § 524.402
Chlorhexidine
(a) Specifications. Each gram of ointment contains 10 milligrams chlorhexidine acetate.
(b) Sponsors. See Nos. 054771 and 058829 in § 510.600(c) of this chapter.
(c) Conditions of use in dogs, cats, and horses—(1) Indications for use. For use as a topical antiseptic ointment for surface wounds.
(2) Limitations. Do not use in horses intended for human consumption.