2 Naphthoxy Acetic Acid - Beta Naphthoxy Acetic Acid is an industrial lab chemical. It works as a plant growth hormone that can regulate the growth of grapes, tomatoes, and apple. This is a phytohormone as well as a plant growth regulator. In addition, this is the component or maintenance medium for embryo cell suspension. 2 Naphthoxy Acetic Acid - Beta Naphthoxy Acetic Acid is also useful as a medium component that can make the somatic embryogenesis.