Carbon Dioxide

Carbon dioxide is used as a non-flammable aerosol propellant in products like tire shines where reducing flammability is a design goal. Unlike propane/butane propellants, CO2 has no flash point and cannot form an explosive atmosphere. The trade-off is slightly lower spray consistency at temperature extremes compared to liquefied petroleum gas propellants. The H280 classification (gas under pressure) is the only GHS hazard — the can may rupture if heated above 50°C (120°F), same as any pressurized aerosol. At ambient CO2 levels (typically 0.04% of air), there is no inhalation hazard from a brief spray. Only at sustained concentrations above ~5,000 ppm does CO2 become a simple asphyxiant concern — unreachable with consumer aerosol use. No ozone-depleting potential (unlike older CFC/HFC propellants). The CO2 released per can is trivially small relative to any meaningful climate accounting threshold.