The British spelling of the verb meaning to remove sulfur from a substance through a chemical process.
British English variant of 'desulfurize,' using the '-ise' suffix (common in British spelling) rather than the American '-ize.' The term developed alongside industrial chemistry in the 19th century.
The British 'desulphurise' and American 'desulfurize' show how spelling variations can persist in technical vocabulary even as chemistry became truly international—a reminder that language divides can last longer than scientific ones.
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