This standard specifies the requirements, safety information, sampling, test methods, inspection rules, signs, labels, packaging, transportation and storage of p-nitroaniline, o-nitroaniline and m-nitroaniline. This standard applies to the product quality control of p-nitroaniline, o-nitroaniline and m-nitroaniline. Molecular formula: C6H6N2O2 Relative molecular mass: 138.13 (according to the international relative atomic mass in 2013) CAS RN: p-nitroaniline: 100- 01-6 o-nitroaniline: 88-74-4 m-nitroaniline: 99-09-2