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Rasayana Shastra (Samskrit: रसायनशास्त्रम्) referred to the subject of Chemistry based on the chemical activities involved in biological and inorganic processes. It was also called Rasatantra, Rasa Kriya or Rasa Vidya roughly translating to 'Science of Liquids'. It is well known that science and technology in ancient and medieval India covered all the major branches of human knowledge and activities, including mathematics, astronomy, physics, chemistry, medical science and surgery etc.  

Rasayana Shastra (Samskrit: रसायनशास्त्रम्) referred to the subject of Chemistry based on the chemical activities involved in biological and inorganic processes. It was also called Rasatantra, Rasa Kriya or Rasa Vidya roughly translating to 'Science of Liquids'. "Rasa" in ayurvedic terminology refers to mercury and [[Rasashastra (रसशास्त्रम्)|Rasashastra]] exclusively deals with the treatment using mercury and its compounds. The term "Rasayana" means It is well known that science and technology in ancient and medieval India covered all the major branches of human knowledge and activities, including mathematics, astronomy, physics, chemistry, medical science and surgery etc.  

Chemistry is the study of elements present in the universe which involves the nature of the elements, their occurrence, their physical and chemical properties, their compounds, reactivity, uses and applications. Ancient samskrit literary works supported by the archaeological excavations all over the nation have proved the development of this science as early as the vedic period. The earliest evidence of chemical knowledge possessed by the ancient Indians in the  prehistoric age has been brought to light by the findings of archaeological excavations in Baluchistan, Sindh and Punjab. The ruins of the Indus Valley Civilization that have been unearthed at in these areas furnish much information about the chemical knowledge acquired by the Indus Valley people, particularly with reference to the practical arts like pottery, brick-making, and extraction and working of metals.<ref>Ray, P. (1956) ''History of Chemistry in Ancient and Medieval India, incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray.'' Calcutta: Indian Chemical Society</ref>

Chemistry is the study of elements present in the universe which involves the nature of the elements, their occurrence, their physical and chemical properties, their compounds, reactivity, uses and applications. Ancient samskrit literary works supported by the archaeological excavations all over the nation have proved the development of this science as early as the vedic period. The earliest evidence of chemical knowledge possessed by the ancient Indians in the  prehistoric age has been brought to light by the findings of archaeological excavations in Baluchistan, Sindh and Punjab. The ruins of the Indus Valley Civilization that have been unearthed at in these areas furnish much information about the chemical knowledge acquired by the Indus Valley people, particularly with reference to the practical arts like pottery, brick-making, and extraction and working of metals.<ref>Ray, P. (1956) ''History of Chemistry in Ancient and Medieval India, incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray.'' Calcutta: Indian Chemical Society</ref>