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M-nitrobenzoic acid is used in the pharmaceutical industry to produce cholic acid, vinegar-iodobenzoic acid, etc. It is also an intermediate of photosensitive materials, functional pigments and organic synthesis. It is also a reagent for determining thorium and alkaloid. In industry, benzoic acid was used as raw material and nitrated with sodium nitrate in the presence of sulfuric acid, with a yield of 60%. If benzoyl is esterified with methanol in the presence of sulfuric acid to methyl benzoate, then nitrated with mixed acid and then hydrolyzed, it is a little troublesome to produce by this method, but the yield can approach 70%. It can also be obtained by direct nitration with mixed acid. The yield is about 60%. Sealed packaging and stored in a cool and ventilated place. According to the provisions of the organic drugs storage andtransportation.
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