Simple Asphyxiants
Simple asphyxiants are substances that displace oxygen in the air, making it impossible for people to breathe. These asphyxiants include gases such as nitrogen, argon, helium, and neon, as well as aerosols such as air fresheners and hairspray. All of these gases are non-toxic, but can still cause suffocation if inhaled in high enough concentrations.
Chemical Asphyxiants
Chemical asphyxiants are substances that can cause asphyxiation by directly reducing the availability of oxygen in the air. These asphyxiants include carbon monoxide, hydrogen sulfide, and chlorine gas. Unlike simple asphyxiants, chemical asphyxiants are toxic and can cause serious health problems if inhaled in high concentrations.
Conclusion
Asphyxiants are substances that can cause suffocation by reducing the availability of oxygen in the air. Simple asphyxiants are usually non-toxic gases such as nitrogen, argon, helium, and neon, while chemical asphyxiants are toxic gases such as carbon monoxide, hydrogen sulfide, and chlorine gas. Inhaling either type of asphyxiant in high enough concentrations can be dangerous and even fatal.