Photoresist Chemicals Benzenesulfonic acid, 2(or 5)-hydroxy-5(or 2)-(1-(4-hydroxyphenyl)-1-methylethyl)-, monosodium salt, polymer with formaldehyde Cas：68856-41-7 Molecular Formula：Benzenesulfonic acid, 2(or 5)-hydroxy-5(or 2)-(1-(4-hydroxyphenyl)-1-methylethyl)-, monosodium salt, polymer with formaldehyde