Another very easy method for getting basic information on sodium fluoride is to do a google search with the search terms "MSDS sodium fluoride".
An MSDS is a 'Material Safety Data Sheet' and lists basic safety information such as toxicity, flammability etc. Anyone who works with chemicals uses MSDS's as the first point of reference when determining how to handle and store stuff.
The MSDS for sodium fluoride basically says 'nasty ....'
