According to Smitty Two :
I wrote in article ,
The FDA has only approved 2-octyl cyanoacrylate for medical use.

Interesting article, thanks. We use hot stuff for a lot of things around
the shop, including cuts. I didn't realize there was a difference
between brands, other than various viscosity formulations.

I've been finding the cheap stuff often doesn't bond very well,
while Hot Stuff does what we want all the time. I tend
to think of CA (even Hot Stuff) only as a temporary glue for the
stuff we do (eg: model and high power rocketry). Good for (some)
quick field repairs, or tacking a part so that a slow-set glue can
cure, but it doesn't put up with temperature extremes or dampness
that well, and it's not that strong compared to a good epoxy
or even yellow/white glue. On the materials we work with of
course... (paper, cardboard, fiberglass, aluminum).

It does have one property that's highly prized in rocketry - being
very thin, it'll soak in and reinforce cardboard edges after they
start getting banged up.

I'm sure Hot Stuff is fine for small cuts - the amount of formaldehyde
would be quite small. However, formaldehyde _is_ nasty stuff and an
allergic sensitizer, and if you were dealing with the sizes of
incisions/wounds that surgeons would, it would begin to matter quite a
bit.
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.