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Item | Standard requirements | Measured value |
Appearance | Pale yellow crystal | Pale yellow crystal |
Identify | Check the UV absorption of this product and compare it with the reference product. It should be consistent with the UV spectrum of the reference product | Confirm |
Purity | 99.0% Min | 99.80% |
Water content | ≤0.5% | 0.11% |
Melting point | 239.0~242.0℃ | 240.5℃ |
Drying reduction | 0.5% Max | 0.25% |
Sulfated ash | ≤0.2% | 0.06% |
Heavy metal content | 10ppm Max | Confirm |
Impurity: 2-nitrobenzoic acid | 0.2% Max | 0.01% |
Impurity: 3-nitrobenzoic acid | 0.2% Max | 0.06% |
Total impurity content | 1.0% Max | 0.07% |
English Name: P-Nitrobenzoic Acid
CAS No.: 62-23-7
Molecular formula: C7H5NO4
Molecular weight: 167.12
EINECS No.: 200-526-2
Chemical property: yellow white crystal. Soluble in ethanol, ether, chloroform, acetone, boiling water, slightly soluble in benzene, carbon disulfide, insoluble in petroleum ether.
Use: This product is an intermediate of organic synthesis of medicine, dyes, veterinary drugs, photosensitive materials, etc. It is used for the production of procaine hydrochloride, procaine amine hydrochloride, p-aminomethylbenzoic acid, folic acid, benzocaine, Tuishou, cephalosporin V, p-aminobenzoylglutamate, and benier, as well as the production of active bright red m-8b, active red purple X-2R, as well as filter, color film color forming agent, metal surface rust remover, sunscreen, etc.
Manufacturing
