3275. 3,4-Dinitrobenzoic Acid

Nomenclature

CAS number: 528-45-0
C7H4N2O6; mol wt 212.12.
C 39.64%, H 1.90%, N 13.21%, O 45.26%.

Description and references

Prepd by treating 3-nitro-4-aminotoluene with Caro's acid and oxidizing the 3-nitro-4-nitrosotoluene with potassium dichromate: Langley, Org. Synth. 22, 47 (1942); by oxidation of 3,4-dinitrotoluene: Goldstein, Voegeli, Helv. Chim. Acta 26, 475 (1943).

Chemical structure

Properties

Crystals from water + alc. Bitter taste. mp 166°; (mp 165.5-166.5°, Goldstein). 0.673 g dissolves in 100 parts water at 25°. Freely sol in alc, ether and hot water. Sublimes.

Use

In quantitative sugar analysis.