Answer :
That is because Alchemy is not based on real research and facts, but rather on magic and occultism. Sure, many things in it have been used as basics for some chemistry, but most is false and incorrect.
Alchemy is not recognized as a science due to its lack of adherence to the scientific method, which includes empirical testing and falsifiability. Alchemy, with goals such as transforming lead into gold, did not operate under the same rigorous standards as modern science, which is predicated on evidence and experimentation.
Alchemy is not considered a science because it does not adhere to the scientific method, which involves testing hypotheses through empirical evidence, experimentation, and the possibility of falsification. Alchemy was once a serious scholarly endeavor, practiced in regions like China, Arabia, Egypt, and Europe. However, it lacked the rigorous methods of investigation that characterize modern science. For example, one of the goals of alchemists was to transform lead into gold, a process we now understand to be impossible because they are distinct elements that cannot be converted into each other by chemical means.
Alchemy also bore elements of mysticism and secrecy, as it didn't universally rely on observation as a valid approach to understanding nature. Notably, historical figures like Isaac Newton were involved in alchemy along with their scientific pursuits, which highlights its respected status during its time. Yet, the turning point towards chemistry entailed recognizing that elements cannot be created or destroyed through alchemical processes, but only rearranged, solidifying the foundation for modern chemistry.
To be classified as science, a branch of inquiry must allow its basic laws or theories to be tested using the scientific method. This rigorous process demands reproducibility, precision, falsifiability, and simplicity, which alchemy did not provide.
