499. Ammonium Binoxalate

Nomenclature

CAS number: 5972-72-5
Ethanedioic acid ammonium salt (1:1); ammonium acid oxalate; ammonium hydrogen oxalate.
C2H5NO4; mol wt 107.07.
C 22.44%, H 4.71%, N 13.08%, O 59.77%.
NH4OOCCOOH.

Description and references

Prepn of monohydrate: Dehn, Heuse, J. Am. Chem. Soc. 29, 1137 (1907). Review: Gmelins, Ammonium (8th ed.) 23, pp 405-406 (1936).

Derivative

Monohydrate.

Properties

Rhombic crystals. Poisonous. d 1.56. Sol in 25 parts water; slightly sol in alcohol.

Use

To remove ink stains.