First, thank you for your nice comments about the article.
Originally Posted by jbrodkey
I can't speak to Formulary's marketing practices since I have no involvement with their distribution of Pyrocat-HD.
As to the other issue, the recommendation to mix the chemicals outside or with a vent hood is made to err on the side of safety. I personally mix indoors with a filtered mask of the type available at hardware store, taking care to keep the chemicals being mixed downwind of any air currents that may be present, and would not hesitate to recommend this procedure for any reasonably prudent and careful person.