Also Called: c Level represents absorbed dose (rounded from 6,525 µg/day ). Since 100% of ingested toluene is absorbed, oral dose is equivalent to administered dose. It is assumed that roughly 50% of the dose administered by the inhalation route is absorbed. Therefore the MADL for inhaled toluene is 13,000 µg/day (rounded from 13,050 µg/day ), corresponding to an absorbed dose of 6,525 µg/day.