What is the permissible exposure limit to MDA?

The permissible exposure limit (PEL) for 4,4'-methylenedianiline (MDA) set by the Occupational Safety and Health Administration (OSHA) is 0.01 parts per million (ppm) as an 8-hour time-weighted average (TWA). Additionally, for short-term exposures, the limit is 0.03 ppm over a 15-minute period. These limits are designed to protect workers from potential health risks associated with MDA exposure. Always refer to the latest regulations or guidelines for updates.