The disinfectant in Izal was also available in liquid form (in fact I think that it still is) it had a strong and very distinctive smell. Useful for dealing with residual whiffs if you had, for instance, needed to clear an outside drain, or clean up a rubbish bin.

Led to the childhood ditty-

Ding dong dell,
Pussy's in the well,
But now we've put some Izal down,
And never mind the smell.