1974
https://www.cpsc.gov/Newsroom/News-Releases/1974/CPSC-Issues-Ban-On-Vinyl-Chloride-In-Aerosols
The ban, issued under the authority of the Federal Hazardous Substances Act will take effect 45 days after publication in the Federal Register unless legally sufficient arguments are submitted to the Commission, necessitating a public hearing.
Vinyl chloride has been linked by scientific studies and clinical reports to a rare form of liver cancer. Although there is no evidence directly linking cancer to the use of aerosols containing vinyl chloride, consumers are always subject to inhalation of the substance whenever they use aerosols that contain it. And there is no known safe exposure level.