This document specifies the molecular formula, structural formula, relative molecular mass, CAS number, technical requirements, and testing of the nucleating agent 2,2'-methylene-bis-(4,6-di-tert-butylphenyl)phosphate sodium salt. Methods, inspection rules, markings, packaging, transportation and storage, etc. This document is applicable to nucleating agents 2 prepared from 2,4-di-tert-butylphenol, formaldehyde, phosphorus oxychloride and sodium hydroxide as main raw materials through the reaction of bisphenol and arylphosphoric acid substituted chloride and salt formation. ,Examination of 2'-methylene-bis-(4,6-di-tert-butylphenyl)phosphate sodium salt.