Synonyms: Benzenesulfonic acid, 4-hydroxy-, polymer with formaldehyde and urea, reaction products with aniline, 1,3-bis(hydroxymethyl)urea, 4,5-dihydroxy-1,3-bis(hydroxymethyl) -2-imidazolidinone, disodium disulfite, formaldehyde, tetrahydro-3,5-bis(hydroxymethyl)-