>>12020872Depends on what you mean by molecular structure. If the colour of two substances differs under the same light source, then the chemical composition of the two must be different. According to my quick online search, white vinegar is made from fermented alcohols (corn, malt, etc.), while brown vinegar could be made from many different things. The additional contents affect the colour. However, I'm pretty sure the main "ingredient" in table vinegar, ethanoic acid, will be at a concentration of about 6% (iirc) in all types.
