Even if they did, the reply would likely be worthless.
The FDA's Incomprehensible Answer To A Crucial Question About Its E-Cigarette Regulations
..... Siegel, who supports the use of e-cigarettes as a harm-reducing alternative to the conventional kind, says “someone” (presumably a business owner) shared with him the FDA’s response to this question: “Are e-cigs that do not contain nicotine (or any other tobacco extracts) also covered by the FDA deeming regulations? If so, will they also require pre-market approval like products that do contain nicotine?” The agency’s reply, which
you can read in its entirety (if you dare) on Siegel’s tobacco policy blog, is more than
1,300 words long and consists mostly of irrelevant boilerplate. When the FDA finally attempts to answer the question, in the 10th paragraph of its missive,
the answer makes no sense:
....
You know, I've read that, and while I agree that it is absurd, it actually does "make sense" in the context of the regulations as a whole, or at least to me, with an assumption or two. This is the answer in question:
"As it relates to e-liquids that contain zero nicotine, generally, if your zero-nicotine product
is not made or derived from tobacco, it may still be a tobacco product subject to FDA regulation if it is intended or reasonably expected to be used with or for the human consumption of a tobacco product; or intended or reasonably expected to alter the performance, composition, constituents, or characteristics of a tobacco product (with certain exceptions relating to controlling moisture or temperature for storage and initiating external heat source), your product
is subject to FDA regulation. These products will be evaluated on a case-by-case basis.
This applies to closed and open system devices that contain zero-nicotine"
we already know that the FDA considers 0nic e-liquid to be a tobacco product component, and therefore subject to the regulations, because nicotine could be added to it.
A carto that contains 0nic, even if it has a proprietary connection and is sealed, would be considered a tobacco product component, if it could be connected to a battery that also could connect to cartos that DO contain nicotine. The carto with the nicotine is a tobacco product, the battery is a component, and by association the 0nic carto is also a component.
The only way something vapeable could not be a tobacco product or a tobacco product component, that I can see, according to their rules would be a 0nic disposable that absolutely can not be refilled.
So, if the question really was "are e-cigs that do not contain nicotine also covered by the FDA regulations?" The answer actually is "probably yes, under the circumstances outlined in the regs, though there might possibly be an exception."
"are e-cigs that do not contain nicotine also covered by the FDA regulations?" is actually not as specific a question as it appears to be.