>> " It is a violation of Federal Law to use this product in a manner inconsistent with it's labeling.""
I've seen that on slug bait and insecticicdes.
"Not for use ..." doesn't sound quite as draconian. More like the vendor's legal department applying CYA: "you can't sue us for ANYthing, because we labelled it "not for any plausible use whatsoever".
Maybe it contains something "not for human consumption" or "determined by the sate of California to be uncool" and they labelled it to preclude any regulatory agency anywhere having any jurisidction.
And I'm baffled as to why something would be labelled "not for research purposes."