This standard is a product specification for polyphenylene ether (PPE, also known as PPO) base resin produced by the polymerization of 2,6-dimethylphenol and oxygen. It comprehensively stipulates the technical requirements, test methods, inspection rules, as well as the entire process content such as labeling, packaging, transportation, and storage for such resins. The detection instruments involved are relatively extensive, primarily including a melt flow rate tester for evaluating its melt flow performance, as well as an Ubbelohde viscometer and a spectrophotometer for detecting its solution properties (such as solution viscosity and color). Additionally, key equipment that may be used in related tests includes a high-temperature muffle furnace for measuring ash content and a Karl Fischer moisture titrator for detecting moisture content.