Abu Musa
Jabir Ibn Hayyan (721CE - 815CE)
He gave a detailed description of acetic acid, tartaric acid and citric acid.Discovery of hydrochloric acid, sulphuric acid and nitric acid are few of the greatest cobtributions made by Jabir Ibn Hayyan.He combined nitric acid with the hydrochloric acid and invented another acid termed today as " Aqua Regia". The latter is strong enouh to dissolve gold.
His division of substances into three different classes worked as the basis for modern day classification of metals and non-metals.