6−10% HCOOH6-10 \% \mathrm{\ HCOOH}6−10% HCOOH
6−10% CH3COOH6-10\%\mathrm{\ CH}_3\mathrm{COOH}6−10% CH3COOH
6−10% C2H5COOH6-10 \% \mathrm{\ C}_{2} \mathrm{H}_{5} \mathrm{COOH}6−10% C2H5COOH
6−10% C6H5COOH6-10 \% \mathrm{\ C}_{6} \mathrm{H}_{5} \mathrm{COOH}6−10% C6H5COOH
