Cov khoom
P-nitrobenzoic acid
Lub cev thiab tshuaj muaj zog
Yellow-white crystal. Soluble nyob rau hauv ethanol, ether, chloroform, acetone thiab boiling dej, me ntsis soluble nyob rau hauv benzene thiab carbon disulfide, insoluble nyob rau hauv roj av ether.
Daim ntawv thov
Nws yog siv los ua ke procaine, procainamide, p-aminobenzoic acid, folic acid, thiab lwm yam. Nws kuj yog siv los ua ke cov tshuaj tua kab thiab roj.
| Sn | Cov khoom tsom xam | Standard Requirement% |
| 1 | C7H5NO4 | ≥99.0 |
| 2 | Melting point | 238-243 ℃ |
| 3 | Moisture | ≤0.5 |
| 4 | Qhov tshwm sim | daj daj crystallization |
Sau koj cov lus ntawm no thiab xa tuaj rau peb
