Sorbitol anhydride esters: A mixture consisting of sorbitan monostearate as defined in § 172.842 of this chapter polysorbate 60 ((polyoxyethylene (20) sorbitan monostearate)) as defined in § 172.836 of this chapter and polysorbate 20 ((polyoxyethylene (20) sorbitan monolaurate)), meeting the specifications of the Food Chemicals Codex, pp. Less than 1 part per million cyanide in the sodium glucoheptonate. Total not to exceed 1 part per million in boiler feed water (calculated as the acid).Ĭontains not less than 95 percent sodium carboxymethylcellulose on a dry-weight basis, with maximum substitution of 0.9 carboxymethylcellulose groups per anhydroglucose unit, and with a minimum viscosity of 15 centipoises for 2 percent by weight aqueous solution at 25 ☌ by the “Viscosity of Cellulose Gum” method prescribed in the Food Chemicals Codex, pp. Polymaleic acid, and/or its sodium salt. Copolymer contains not more than 0.5 percent by weight of acrylic acid monomer (dry weight basis). Total not to exceed 1.5 parts per million in boiler feed water. 7), produced from a 4:1 to a 16:1 mixture by weight of acrylic acid and sodium hypophosphite Poly(acrylic acid- co-hypophosphite), sodium salt (CAS Reg. Monobutyl ethers of polyethylene-polypropylene glycol produced by random condensation of a 1:1 mixture by weight of ethylene oxide and propylene oxide with butanol Total not to exceed 20 parts per million (active) in boiler feedwater.ġ-hydroxyethylidene-1,1-diphosphonic acid (CAS Reg. Contains not more than 0.05 percent by weight of acrylamide monomer.Īcrylic acid/2-acrylamido-2-methyl propane sulfonic acid copolymer having a minimum weight average molecular weight of 9,900 and a minimum number average molecular weight of 5,700 as determined by a method entitled “Determination of Weight Average and Number Average Molecular Weight of 60/40 AA/AMPS”