Section 520.1840 - Poloxalene(a)Specifications. Polyoxypropylene-polyoxyethylene glycol nonionic block polymer.(b)Sponsors. See sponsors in § 510.600(c) of this chapter for use as in paragraph (d) of this section. (1) No. 054771 for use as in paragraphs (d)(1) and (d)(3) of this section.(2) No. 067949 for use as in paragraph (d)(2) of this section.(3) No. 066104 for use as in paragraph (d)(3) of this section.(c)Related tolerances. See § 556.517 of this chapter.(d)Conditions of use.(1) For treatment of legume (alfalfa, clover) bloat in cattle. Administer as a drench at the rate of 25 grams for animals up to 500 pounds and 50 grams for animals over 500 pounds of body weight.(2) For control of legume (alfalfa, clover) bloat in cattle. Administer, in molasses block containing 6.6 percent poloxalene, at the rate of 0.8 oz. of block (1.5 grams poloxalene) per 100 lbs. of body weight per day.(3) For prevention of legume (alfalfa, clover) and wheat pasture bloat in cattle. A 53-percent poloxalene top dressing on individual rations of ground feed. Dosage is 1 gram of poloxalene per 100 pounds of body weight daily. If bloating conditions are severe, the dose is doubled. Treatment should be started 2 to 3 days before exposure to bloat-producing conditions. Repeat use of the drug if animals are exposed to bloat-producing conditions for more than 12 hours after the last treatment. Do not exceed the double dose in any 24-hour period.40 FR 13838, Mar. 27, 1975, as amended at 40 FR 39857, Aug. 29, 1975; 42 FR 41854, Aug. 19, 1977; 50 FR 5385, Feb. 8, 1985; 54 FR 33501, Aug. 15, 1989; 56 FR 50653, Oct. 8, 1991; 58 FR 26523, May 4, 1993; 60 FR 55659, Nov. 2, 1995; 66 FR 47963 , Sept. 17, 2001; 69 FR 62811 , Oct. 28, 2004; 70 FR 32489 , June 3, 2005; 78 FR 28826 , May 20, 2014; 83 FR 48946 , Sept. 28, 2018; 84 FR 32992 , July 11, 2019 83 FR 48946 , 10/9/2018; 84 FR 32992 , 9/9/2019