One of the mysteries of the English language finally explained.
- old-fashioned term for ammonium chloride
- ‘The dissolutive water is made from vitriol of Cyprus, saltpetre (potassium nitrate), Jamenous Allom, and sal ammoniac (ammonium chloride), and it became known as aqua regia, the king of waters.’
- ‘Upon burning, the dung produced acrid vapors and would leave behind a white residue which they called sal ammoniac, meaning salt of Ammon.’
- ‘Wollaston paid careful attention to the waste solutions that remained after the precipitation of the platinum salt of sal ammoniac, being curious about the nature of any non-platinum components.’
- ‘They had made a chemical discovery while students in Edinburgh, discovering a way to make sal ammoniac, a chemical used in welding metal.’
Middle English: from Latin sal ammoniacus ‘salt of Ammon’ (see ammoniacal).
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