oxalic

[ ok-sal-ik ]

/ ɒkˈsæl ɪk /

of or derived from oxalic acid.

Origin of oxalic

From the French word oxalique, dating back to 1785–95. See oxalis, -ic

Nitric acid makes it red, and if heated upon it, converts it into oxalic acid.

A Dictionary of Arts, Manufactures and Mines |Andrew Ure
Ten cents' worth of oxalic acid dissolved in a pint of hot water will remove paint spots from the windows.

The Whitehouse Cookbook (1887) |Mrs. F.L. Gillette
In some constitutions there is a peculiar tendency to an abnormal oxidation of these materials into Oxalic acid.

The Action of Medicines in the System |Frederick William Headland
Concentrate bath, make alkaline by sodium carbonate, and add aqueous solution of oxalic acid neutralised with sodium carbonate.

Cooley's Practical Receipts, Volume II |Arnold Cooley

A tumbler was on a small table and a bottle of oxalic acid, "salts of lemon, as they call it," said the man.

If Winter Comes |A.S.M. Hutchinson