Related properties of m-nitrobenzoic acid

Molecular formula:

C7H5NO4

Molecular weight:

one hundred and sixty-seven point one two

Physical property data

1. Appearance: White or light yellow crystals, or crystalline powder, with a bitter almond taste.

2. Density (g/mL, 25/4 ℃): 1.494

3. Melting point (℃): 142 ℃

4. Solubility: Difficult to dissolve in cold water, relatively soluble in hot water, soluble in ethanol, ether, chloroform, methanol, and acetone, slightly soluble in benzene. Carbon disulfide and petroleum ether.

Nature and stability

Acidic and irritating to the skin.

synthetic method


In industry, benzoic acid is used as raw material, and nitration with sodium nitrate in the presence of sulfuric acid can achieve a yield of up to 60%. If benzoyl is esterified with methanol in the presence of sulfuric acid to methyl benzoate, then nitration with mixed acid, and finally hydrolyzed, this method of production is slightly more complicated, but the yield can approach 70%. It can also be obtained by direct nitration with mixed acid. The yield is around 60%.

purpose


Used in the pharmaceutical industry for the production of bile acids, acetic acid iodobenzoic acid, etc. It is also an intermediate for photosensitive materials, functional pigments, and organic synthesis. Or it is a reagent for determining thorium and alkaloids.