Two things that do not belong in a flammable storage cabinet (among others) are oxidizers and potential ignition sources. I consider pyrophoric materials (including white phosphorus) to be a potential ignition source. In searching the web I found a lot of flammable storage cabinet guideline material that covers construction, venting, liquid capacity, placement, etc., but very little on what should be not be stored inside other than acids. During lab inspections I have found butane bottles stored in these cabinets with the torch tip still attached. I need to update my own flammable storage guide to cover ignition sources inside the cabinet more explicitly.
Thanks to Jyllian for the update.
Al