Yup, it is a perfluorinated hydrocarbon similar to Teflon.
Teflon is extremely chemical resistant. We use Teflon coated magnetic stir bars to stir just about every reaction. The only reaction I've seen destroy Teflon regularly is during a dissolving metal reduction when stirring sodium metal in liquid ammonia. Turns the stirbars black with carbon, tears off the fluorine somehow.
And indeed, FEP beakers and containers are used in the lab as well for extremely corrosive expermients, stuff that would eat glass (Like HF) , even concentrated lye solutions can etch glass over time. So FEP is safer than glass in that sense. Just beware it melts at a high enough temperature (280C)
The plastics themselves are therefore very robust, nothing you can do to hurt them chemically. Just be aware of plasticizers , which are not perfluorinated carbon based, and can leech out of plastics. Well made Lab grade containers are usually not leechable in this respect, especially for analytical purposes, though cheap Chinese ones will not be as good (you get what you pay for).
Although, FEP by nature is malleable, they may not even use any plasticizers at all, and very little compared to typical plastics if any. Especially in your case of the FEP plastic bottle. It would be more common to find the plastizers in plastics used to coat wirings or wherever the extra malleability would be handy.
You can do some research for your case, there are some threads here on the nexus on plasticizers , and you can do some googling about your case with FEP for some additional information.
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