煉金術(粵拼:lin6 gam1 seot6;英文 Alchemy,日文寫做鍊金術)係中世紀嘅一種化學哲學嘅思想同實踐,係當代化學嘅雛形。目標係透過化學嘅方法,將一啲基本金屬變成黃金,製造萬靈藥同製備長生不老藥。
而家嘅科學表明呢種方法係行唔通嘅,但係直到19世紀之前,煉金術重未俾科學證據所否定。連牛頓同一班出名嘅科學家都試過煉金術。現代化學嘅出現,先至令人懷疑煉金術嘅可能性。
煉金術經過現代科學證明係行唔通嘅。但係作為現代化學嘅先驅,喺化學發展史上起到一定嘅積極作用。透過煉金術,人累積咗化學操作嘅經驗,發明咗好多種實驗架生,識到好多隻天然礦物。煉金術喺歐洲成為現代化學嘅發展基礎。
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