84777-57-1 EINECS 284-086-7 Urea, N,N'-bis(hydroxymethyl)-, reaction products with 2-butyne-1,4-diol, ethylene glycol, formaldehyde, glutaraldehyde and tetrahydro-1,3,4,6-tetrakis(hydroxymethyl)imidazo(4,5-d)imidazole-2,5(1H,3H)-dione