Susan Goldhaber et al.
Inhalation toxicology, 21 Suppl 3, 17-55 (2009-10-16)
Application of Provisional Advisory Level (PAL) protocols was performed for acrylonitrile, as experimental data permitted. Three levels (PAL 1, PAL 2, and PAL 3), distinguished by severity of toxic effects, are developed for 24-hour, 30-day, 90-day, and 2-year durations of