21 CFR §524.2101

1. (a)Specifications. The product contains 0.9-percent weight in weight (w/w) selenium disulfide (1-percent weight in volume (w/v)).
2. (b)Sponsors. See Nos. 000061 and 017135 in § 510.600(c) of this chapter.
3. (c)Conditions of use on dogs—(1) Indications for use. For use as a cleansing shampoo and as an agent for removing skin debris associated with dry eczema, seborrhea, and nonspecific dermatoses.
   1. (2)Amount. One to 2 ounces per application.
   2. (3)Limitations. Use carefully around scrotum and eyes, covering scrotum with petrolatum. Allow the shampoo to remain for 5 to 15 minutes before thorough rinsing. Repeat treatment once or twice a week. If conditions persist or if rash or irritation develops, discontinue use and consult a veterinarian.