Process means the preparation of a toxic chemical, after its manufacture, for distribution in commerce:
(1) In the same form or physical state as, or in a different form or physical state from, that in which it was received by the person so preparing such substance, or
(2) As part of an article containing the toxic chemical. Process also applies to the processing of a toxic chemical contained in a mixture or trade name product.
40 CFR § 372.3
Terms defined in sections 313(1)(c) and 329 of Title III and not explicitly defined herein are used with the meaning given in Title III. For the purpose of this part: