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3-Nitrobenzoic acid 121-92-6
Category : Dyestuffs and Pigments
CAS NO : 121-92-6 EC NO : 204-508-5 MF : C7H5NO4 MW : 167.1115 Specification : 99% min Packing : 25kg 50kg drum or bag Product description : What is the chemical of 3-Nitrobenzoic acid ? Appearance: White powder or pale yellow fine granular crystals； Assay:99%min by HPLC； IR Identity: conform to standard； HNMR： conform to standard； carbon spectrum: conform to standard； Water by K. F.:0.5% max or as per the customer’s request； Loss on drying:0.5% max. or as per the customer’s request； =============================================================================== Uses m-Nitrobenzoic acid is an important organic synthesis intermediate, widely used in multiple industrial fields: Pharmaceutical industry: As a key intermediate for synthesizing contrast agents such as cholangiographic acid and iopanoic acid; Photographic materials: Used in the manufacture of photographic films and other photosensitive products; Functional pigments and dyes: As an intermediate for producing pigments and dyes with specific optical properties; Organic synthesis: Used in the coupling reaction of allyl acetate with allyl, aliphatic, and benzyl alcohols, and can also act as a chemical attractant against Pseudomonas aeruginosa; Analytical reagents: Used for determining thorium, alkaloids, etc., and can also serve as standards for carbon, hydrogen, and nitrogen in organic trace analysis; Other uses: As a metal ion precipitant, and plays a role in the synthesis of new anti-epileptic drugs. =============================================================================== Main Synthetic Routes Benzoic Acid Direct Nitration Method: This is the most commonly used method in industry. Using benzoic acid as the raw material, nitration is carried out with sodium nitrate (or mixed acid) under the catalysis of concentrated sulfuric acid to directly obtain m-nitrobenzoic acid. The yield of this method is approximately 60%. Benzoic Acid Methyl Ester Nitration Hydrolysis Method: This method involves more steps but has a higher yield (up to nearly 70%). First, benzoic acid is esterified with methanol in the presence of sulfuric acid to produce methyl benzoate; then methyl benzoate undergoes mixed acid nitration; finally, the nitrated product is hydrolyzed to obtain m-nitrobenzoic acid. Direct Nitration Method: Mixture acid (a mixture of concentrated nitric acid and concentrated sulfuric acid) can also be used to directly nitrate benzoic acid for preparation, with a yield also around 60%. In summary, the synthesis of m-nitrobenzoic acid (CAS No. 121-92-6) mainly revolves around nitration reactions of benzoic acid. The benzoic acid direct nitration method is widely adopted due to its relatively simple process, while the benzoic acid methyl ester nitration hydrolysis method is used in scenarios where higher yields are required. Uses : 3-Nitrobenzoic acid is an important organic synthesis intermediate, widely used in multiple industrial fields Synonyms : m-Nitrobenzoic acid;MNBA;3-nitrobenzoate;Meta-nitro-benzoic acid; Molecular Structure : 
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3-Nitrobenzoic acid