English to Russian Tech/Engineering Chemistry; Chem Sci/Eng Регламент REACH

I'm looking for Russian translation of "Non-isolated intermediate". The term is included in blank to be filled concerning new substance review within "регламент химических веществ" REACH.
Unfortunately I don't have more specific context, but I found this definition, hope it will help.
Non-isolated intermediate.
A substance that is manufactured solely for the purpose of being transformed into another substance (or synthesis) and is used up within this reaction. This type of intermediate is not intentionally removed from the synthesising equipment (except for sampling). NOTE: this equipment does not include tanks or other vessels in which the substances is stored after manufacture.