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TeachMeFinance.com - explain Minimal risk level (MRL) Minimal risk level (MRL) The term 'Minimal risk level (MRL)' as it applies to the area of hazardous materials can be defined as 'An ATSDR estimate of daily human exposure to a hazardous substance at or below which that substance is unlikely to pose a measurable risk of harmful (adverse), noncancerous effects. MRLs are calculated for a route of exposure (inhalation or oral) over a specified time period (acute, intermediate, or chronic). MRLs should not be used as predictors of harmful (adverse) health effects [see reference dose]'. Previous 5 Terms: mineralogy Mini van miniaceous minim Minimal nutritional value Next 5 Terms: minimum Minimum access Minimum Discernible Signal minimum fetch Minimum flow About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.