As an aside to this post can everyone please]stop using the word pyro. It is a very old-fashioned term and not a scientific name and is confusing because some people refer to both pyrogallol and catechol by using the same name pyro. So in the future let us all agree to use only accepted chemical names (those recognized by the IUPAC) in this instance pyrogalol and catechol.
I'm an offender of this and will try to make sure I am more specific. I agree, this is quite important.