![RQ calculator image](https://webarchive.library.unt.edu/web/20130217110836im_/http://homer.ornl.gov/rq/images/rq_calculator_masthead.jpg)
Welcome to DOE's RQ•Calculator for mobile devices. Enter the name of a hazardous substance or its Chemical Abstract Service (CAS) number in the field above to look up its Reportable Quantity (RQ) or to evaluate whether a release to the environment must be reported to the National Response Center. If you misspell the name of the substance, the RQ•Calculator will return a list of possible alternatives.
Please see our disclaimer before using the results of the RQ•Calculator in making reporting decisions.