Tannate

Chem. [a. F. tannate (Proust, 1798), f. TANN-IC + -ATE⁴.] A salt of tannic acid.

1802.  Nicholson’s Jrnl., II. 72. The small quantity of tanin dissolved in this water would combine with the lime … and would form a tanate of lime. Ibid., 198. The tannate of tin.

1808.  Henry, Epit. Chem., 240. The gallate and tannate of iron are … essential constituents of inks.

1882.  Encycl. Brit., XIV. 385/1. [It] gives up its dissolved gelatin to the tan of the stronger solution outside to form tannate of gelatin.