No I agree that it's not good news - I was about to buy some for some plywood hives that I've just built.
The hegemony of big business and chemical manufacturers marches on !! However, it's good of Cuprinol to acknowledge the risk on their website but perhaps they should be advertising the fact in the beekeeping press. I do'nt know if Thornes are aware as it's in their current catalogue.
SORRY FOR THE LATE REPLY, raw linseed oil for ceder wood because boiled oil forms a skin on the wood and does not let the wood breath properly, do not put on the inside as this will defeat the object condensation will form. (it will turn moldy).
Slight problem - Normally Cuprinol clear was used to protect the wood from fungal attack and then treated with raw linseed oil. No problem.
Used alone, you will find that raw linseed oil has some problems, other than the drying time, of course.
# No UV (ultraviolet) light resistance... UV causes more damage to exposed wood than any other factor, destroying wood fibers and setting it up for attack by mildew, fungus, and insects.
# Linseed oil is mildew food... Many vegetable oils are food products for humans... all vegetable oils are food products for mildew! Linseed oil is not completely denatured, so it can encourage rather than discourage mildew growth.
Personally I'm a fan of raw linseed oil, but still need to get the brush out . . .