The ASTM D5774-95 standard specifies a chemical analysis method for extractable substances in synthetic rubber, mainly applicable to solid uncompounded styrene-butadiene copolymers (SBR). This method extracts soluble substances in rubber, such as rosin, fatty acids, incremental oils, anti-oxidation agents, etc. by specific solvents, and determines their content through chemical analysis. This standard provides a scientific basis for quality control and performance evaluation of rubber materials, helping to identify potential impurities and additives in rubber, ensuring its safety and Reliability in industrial applications.