Vinyl chloride has a 5ppm 15-minute exposure limit. This atmosphere was 500ppm. My first thought was that the odor would obviously signal danger and deter appr

Vinyl chloride has a 5ppm 15-minute exposure limit. This atmosphere was 500ppm. My first thought was that the odor would obviously signal danger and deter approach, but apparently it has "a pleasant odor at high concentrations." https://www.cdc.gov/niosh/npg/npgd0658.html https://www.cdc.gov/niosh/npg/npgd0658.html