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| a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium |
| a colorless, oily, water-soluble, highly toxic, liquid alkaloid, C10H14N2, found in tobacco and valued as an insecticide |
| Lewis acid | |
| —n | |
| Compare Lewis base a substance capable of accepting a pair of electrons from a base to form a covalent bond | |
| [C20: named after G. N. Lewis (1875--1946), US chemist] | |