... to manufacture formic acid, Oxalate,and sodium hydrosulfite 1500tons/month 98% sodium formate CAS No. 141-53-7EINECS 205-488-0Color ... acid, Oxalate,and sodium hydrosulfite oil drilling fluidspecification AppearanceColourless liquidContentMin 98%NaOH,%≤≤0.5%Na2C03,%≤ ≤1.0%NaCL,%≤ ≤0.2%Na2S ...