Welcome to the world of Citric Acid. Everyone recognizes this compound that is evident in many citris fruits. (ie. oranges, lemons, limes, etc.) This web page will allow everyone to get the fine details on this interesting compound. Who knows, maybe you can impress an individual by stating the density or molar mass of citric acid... or not... Anyways, enjoy and get ready for that brain to soak up that knowledge.