Khal (; ) waa dareere ka samaysan ilaa 5–20% acetic acid (CH3COOH), biyo, iyo noocyo kale oo kimikooyin ah kuwaasi oo u sameeya midabo kala duwan iyo xajmi jaamud oo kala adaga. Khalku waa dareere ka samaysan asiidh iyo biyo kuwaasi oo loo isticmaalo cuntada noocyadeeda kala duwan. Khalka waxaa lagu sameeyaa nidaam bacarimin iyo khamiirin iskugu jirta taasi oo loo isticmaalo ethanol. Sida caadiga ah khalka waxaa lagu daraa cuntada la karinayo iyo raashinka bisil intaba wuxuuna sameeyaa dhadhan dhanaan iyo xalad u yeela cuntada. Marka falgalka khalku socdo waxaa dhacda in sameysmaan isla markaana burburaan isku-dhisyo badan. Sida caadiga ah waxaa lagu bilaabaa in la isku daro isku-dhiska ethanol (CH3CH2OH) iyo ogsajiin (O2) taasi oo noqota acetic acid (CH3COOH)Shaxda falgalka CH3CH2OH + O2 → CH3COOH + H2O Noocyo kala duwan Khalka Shigni Basbaas Cunto Cusbo Vinegar​—The Tangy Acid VINEGAR Sida loo diyaariyo Khalka Isabella Beeton, Mrs Beeton's Cookery Book, 1911, pages 258–60 Studies on acetic acid-bacteria I. Biochemical studies on ethanol oxidation, J Biochem, volume 46|, 9, 1959, Nakayama T, pages 1217–25 Saturated Fat Eat less saturated fat Saladin Kenneth S., 2015 Anatomy & Physiology: The Unity of Form and Function, McGraw-Hill Education, page 55