68201-70-7 Benzenesulfonic acid, sulfonylbis(hydroxymethyl-, tetrasodium salt,polymer with formaldehyde, sulfonylbis(hydroxybenzenesulfonic acid) tetrasodium salt and 2,2'-sulfonylbis(phenol) disodium salt Polymer of (formaldehyde, sodium diphenol sulfone, diphenol sulfonesodium sulfonate, methylated diphenol sulfone sodium sulfonate)