3,4-Dinitrobenzoic Acid
Title: 3,4-Dinitrobenzoic Acid
CAS Registry Number: 528-45-0
Molecular Formula: C7H4N2O6
Molecular Weight: 212.12
Percent Composition: C 39.64%, H 1.90%, N 13.21%, O 45.26%
Literature 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).
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.
Melting point: mp 166°; (mp 165.5-166.5°, Goldstein)
Use: In quantitative sugar analysis.

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