Chem. [f. TRI- 5 a + AMINE.] A carbon compound containing three amidogen or amino-groups (NH2), but excluding the amides, in which the amidogen may be viewed as replacing acid hydroxyl groups; the hydrogen of the amidogen groups may be replaced by one or more monovalent radicals: see also quot. 1868.
1868. Fownes, Elem. Chem. (ed. 10), 882. Triamines. These are bases derived from … three molecules of ammonia … N3H9, by substitution of … trivalent alcohol-radicals for a part or the whole of the hydrogen. A portion of the hydrogen may at the same time be replaced by univalent alcohol-radicals.
1887. Tidy, Mod. Chem. (ed. 2), 758. Aniline red is a salt of base rosaniline, C20H19N3. This … is a triamine.
