Reference substance

Reference substance means any chemical substance or mixture, or analytical standard, or material other than a test substance, feed, or water, that is administered to or used in analyzing the test system in the course of a study for the purposes of establishing a basis for comparison with the test substance for known chemical or biological measurements.

Source

40 CFR § 792.3


Scoping language

As used in this part the following terms shall have the meanings specified:

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