This document specifies the requirements, test methods, inspection rules, marking and accompanying documents, packaging, transportation and storage of by-product N-tert-butylacrylamide. This document applies to the by-product N-tert-butylpropylene obtained through solvent extraction, solid-liquid separation, and drying during the production of 2-acrylamido-2-methylpropanesulfonic acid using acrylonitrile, concentrated sulfuric acid, and isobutylene as raw materials. Amide.