Which is safest: CaO4S indicating or non-indicating or CaCl2 as dessicator

[Dima Klenchin]

"Fun Science" <biotech at idirect.com> wrote:
:Which is safest:

:Its down to the following:
:
:CaO4S indicating or non-indicating (Drierite)
:or
:Ca Cl2
:
:The Drierite seems to be the best option however
:poses higher health risks or may.  Please help me
:choose one.

Sulphate is a better option and poses a lot
lesser health risk than driving a car. As long as
you do not take it a spoonful daily, that it. 

        Dima