A variant of alkarsin; an archaic chemical term for arsenic derivatives or alkali-arsenic compounds.
Variant formation of alkarsin with -ine suffix (common in chemistry). This spelling reflects the standardization struggles of 19th-century chemical nomenclature.
Alkarsine and alkarsin are spelling twins from an era when chemists were still arguing about how to name things—the suffix choices (-in vs -ine) tell us about linguistic battles in scientific nomenclature.
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