comments:
I'll bet that most is going to be moving to propane and butane because of the movement away from HFC's for propellants. They are flammable, but you also have to consider that it has to be the right oxygen to fuel ratio to burn, and to explode. Spraying them directly out of the can isn't going to be the right mixture. https://www.walmart.com/ip/Ultra-Duster-Industrial-Strength-Compressed-Air-Duster-Cleaner-10-oz-12-Pack-UDS-10P12/277910373 https://www.zoro.com/dust-off-disposable-compressed-gas-duster-aerosol-duster-for-electronics-10-oz-2pk-dsxlp/i/G0464801/ https://www.officesupply.com/technology/computer-accessories/cleaning-maintenance/air-dusters/falcon-safety-dust-dpsxlrcp-compressed-pack/p784124.html all three of these are 1,1-Difluoroethane (HFC-152a) which is flammable, https://questspecialty.com/products/2500-Dust-B-Gone-Air-Duster.html This one is Propane/n-Butane which is obviously flammable Refrigerants are moving to these flammable hydrocarbons, as they aren't as dangerous as ammonia but they don't damage the ozone layer.