Article is actually wrong and they do provide some advice on this. https://multimedia.3m.com/mws/media/339742O/3m-full-facepiece-fr-7800b-with-canister-fr-15-c

Article is actually wrong and they do provide some advice on this. https://multimedia.3m.com/mws/media/339742O/3m-full-facepiece-fr-7800b-with-canister-fr-15-cbrn-and-cp3n.pdf https://multimedia.3m.com/mws/media/339742O/3m-full-facepiec... > Also NIOSH-approved with 3MTM Canister CP3N for use against CS, CN and as a P100 filter (TC-14G-0251) in riot conditions, including those with teargas (non-CBRN).