I missed the original post but INERT LIQUID?
I seem to remember that it 'detonates' on a shockwave
and is little short of a high explosive. Neat it is about as
stable as nitro glycerine and diluted it eats anything
with a trace of flamability about it.

INERT?
ROTFL

Sorry to be negative about what probably looked a
good idea at the time but no.

nigelH
Off to the Canaries tomorrow with 65Kgs of baggage. *sigh*

  H2O2 requires special handling precautions, impurities + h2o2 = bad!!!

In a pure state yes but I don't mean pure I was thinking someware around
the 30% to 40 % range.

  Why do you want oxygen to fill a jacket?  Oxygen isn't a particualrly
good
   thing to be filling the dirty inside of your BCD with.

O2 at low pressure is fairly harmless.

   Produces water, which you'd have to get out separately otherwise you
lose
   capacity in your BCD.

As a one off evan a ltr of water would not be too bad. Have you never
had water in your BC before.

  By the time you've sorted out all the stuff for peroxide, you might as
well
  just get one of the little buddy cylinders and take 3 seconds to fill it
  from your tank.  But then most people don't see the point in them, many
  think they're dangerous,

What if it was in a small self conained plastic tube that when snapped it
vented
the gas out to inflate say a DSMB.

  and so best not to bother!  Stick to compressed air!

  David

Didn't they used to use it as rocket fuel oxidiser?

Pete S.

Hehe - technically its stable at room temperature, so in theory on its own
in a clean bottle it won't be tooo bad - maybe thats where hes getting
confused?
But yeah it reacts with most things, has to be handled specially, supposed
to be kept in containers cleaned for h2o2, just like diving oxygen is in o2
clean cylinders.  And like I said you really wouldn't want it loose in your
dirty BCD, nor the oxygen it produces - wouldn't last long.

David

It's also used to disinfect contact lenses. And you can really tell when
you haven't neutralised it properly.

Jason

Don't be too disheartened by all the negative comments. Innovation and
lateral thinking like yours are always to be welcomed. It's what made this
country a world leader in the 18th and 19th centuries, while the paucity of
it nowadays reflects our current position. However risk taking implies a
step into the unknown, which is hardly the case when it comes to handling
hydrogen peroxide, as others here have pointed out.

For what it's worth, I had, until last Christmas, 23 years experience
handling hundreds of tonnes of H2O2 50%. It is a far from being an inert
material, so that even in the presence of stabilising agents it will slowly
decompose and pressurise its container unless suitable precautions are taken
to vent it. It is also very corrosive so that the only common metals that it
can tolerate are aluminium and stainless steel, while few of the common
plastics can resist it either. Finally, while it may not of itself be
flammable, it is a powerful oxidising agent and can cause spontaneous
ignition of many organic materials it comes into contact with. Taking all
that into account it would still be possible to make the sort of device you
thought of, but would it be fool-proof, economically viable, simple to use,
and reliable? Ah well. Back to the drawing board.

Cliff.