sodium formate CAS 141-53-7 to manufacture formic acid, Oxalate,and sodium hydrosulfite 1500tons/month Sodium formate CAS No. 141-53-7EINECS 205-488 ... sodium hydrosulfite oil drilling fluidspecification AppearanceColourless liquidContentMin 98%NaOH,%≤≤0.5%Na2C03,%≤ ≤1.0%NaCL,%≤ ≤0.2%Na2S,%≤ ≤0.03%MOISTURE ...