This document specifies the requirements, test methods, inspection rules, marking and accompanying documents, packaging, transportation and storage of potassium bromide. This document is applicable to potassium bromide-containing solids and liquids produced in the flame retardant industry, difenoconazole and other pesticide industries as raw materials, which are first incinerated at 1100°C and then subjected to ultrafiltration, nanofiltration, MVR evaporation crystallization, drying, etc. The potassium bromide recovered from the treatment is used in chemical production.