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from "Rupert" contains these words:


"thesquire" wrote in message
...
I have been told on good authority that the talc powder based
preparations lose their effectiveness after about eight months, even
if kept in a closed container and refrigerated.
snip

Which good authority has given you this information? IMHO they are talking
nonsense.
I suppose it depends what the formulation contains.
Normal stuff contains Indolebutyric acid and /or Naphthylacetic acid with
other bits and pieces such as fungicide in a talc powder carrier.
These ingredients are stable indefinitely (as a solid) if stored away from
light.

This may be true, but it could also be that they react with each-other.

Citric acid is stable, as is bicarbonate of soda, but mixed, they are
not. Over a period of time they will inter-react, and with considerable
vigour if water gains access.

--
Rusty
Direct reply to: horrid dot squeak snailything zetnet point co period uk
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