Section 558.470 - Polyoxyethylene(a)Specifications. Each molasses-based block contains 2.2 percent polyoxyethylene (23) lauryl ether.(b)Sponsor. See No. 067949 in § 510.600(c) of this chapter.(d)Conditions of use - (1)Amount. 2 grams of polyoxyethylene (23) lauryl ether per 100 kilograms of body weight per day (1 pound of block per 500 kilogram (1,100 pound) animal per day). Initially, provide one block per five head of cattle. Start treatment 10 to 14 days before exposure to bloat-producing pastures.(2)Indications for use. For reduction of the incidence of bloat (alfalfa and clover) in pastured cattle.(3)Limitations. Administer free-choice to beef cattle and nonlactating dairy cattle only. Do not allow cattle access to other sources of salt while being fed this product. Do not feed this product to animals without adequate forage/roughage consumption. 86 FR 14826 , Mar. 19, 2021