Now that we know what is lactic acid, let’s look at the chemical, structural and molecular formula of lactic acid. The chemical formula of the lactic acid is C3H6O3 C 3 H 6 O 3. The molecular weight of lactic acid is 90.08 g/mol. What is Lactic Acid? Lactic Acid is an organic acid with the chemical formula C 3 H 6 O 3. It is also known as milk acid. When milk sugar (lactose) undergoes fermentation, the product obtained is lactic acid. It is found in cottage cheese, leban, sour milk, yoghurt, and Koumiss. Levo and Dextro are two forms of optical isomers of lactic acid. What is Lactic Acid? Lactic acid is an organic acid. It is the main constituent of milk. Hence, also known as milk acid. It contains “carboxylic acid” as a functional group. Lactic acid is a chemical byproduct of anaerobic respiration (which cells produce energy without oxygen). Study Everything About Oxalic Acid Formula In the biological system, there are two types of bacteria: good bacteria and bad bacteria. A good bacteria named “ Lactobacillus ” convert lactose in milk to lactic ... The lactic acid formula is C₃H₆O₃, it is a simple organic acid, that encapsulates its basic molecular composition. In this you will study about lactic acid formula, its structure and it uses etc.