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Take equal parts of sweet salt, Bitter salt, Ṭabarzad salt, Andarānī salt, Indian salt, salt of Al-Qilī, and salt of Urine. In doing so, al-Razi may have stumbled upon a primitive method for producing hydrochloric acid, as perhaps manifested in the following recipe from his Kitāb al-Asrār ('The Book of Secrets'): 865–925, Latin: Rhazes) conducted experiments with sal ammoniac ( ammonium chloride) and vitriol (hydrated sulfates of various metals), which he distilled together, thus producing the gas hydrogen chloride. In the early tenth century, the Persian physician and alchemist Abu Bakr al-Razi ( c.

Hydrochloric acid is an important laboratory reagent and industrial chemical.

It is a component of the gastric acid in the digestive systems of most animal species, including humans. It is a colorless solution with a distinctive pungent smell. Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride with the chemical formula HCl (aq).

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