Prior to 1974, workers were commonly exposed to 1,000 ppm vinyl chloride, causing "vinyl chloride illness" such as acroosteolysis and Raynaud's Phenomenon.
Sebelum 1974, pekerja yang biasa terpapar vinil klorida sebesar 1.000 ppm, menyebabkan "penyakit vinil klorida" seperti akroosteolisis dan Fenomena Raynaud.