C9H10O3

The molecular formula C9H10O3 may refer to:


 * Apocynin, a natural phenol
 * Caffeyl alcohol, a natural phenol
 * Dimethoxybenzaldehydes
 * 2,4-Dimethoxybenzaldehyde, a reagent used to specifically quantify phlorotannins
 * 2,5-Dimethoxybenzaldehyde
 * 3,4-Dimethoxybenzaldehyde (veratraldehyde)
 * 2-Ethoxybenzoic acid
 * Ethylparaben
 * Ethyl salicylate
 * Ethylvanillin
 * Methyl anisate
 * Paeonol, a natural phenol
 * Phloretic acid, a phenylpropanoid
 * Tropic acid