Warning—Personnel using this standard should have practical experience in laboratory work. This standard does not address all safety issues. Users are responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national regulations. This standard specifies the requirements, safety information, sampling, test methods, inspection rules, and marking, labeling, packaging, transportation and storage of p-nitrophenol. This standard applies to the quality control of p-nitrophenol products. Structural formula, molecular formula, relative molecular mass (omitted)