The specification specifies the mass standard of low toluene and low dioxane (LTLD) benzene, covering the purity of benzene, toluene content, sulfur content, thiophene content, non-aromatic hydrocarbon content, nitrogen content and other indicators. It provides specific requirements for testing these indicators and ensuring that the specifications of benzene are met. This specification has important guiding significance for the production and quality control of benzene, ensuring that the physical and chemical properties of benzene meet the standards, so as to meet the needs of various applications.