What is the difference between an inhalation hazard and a dermal hazard? Provide an example of each.

What is the difference between an inhalation hazard and a dermal hazard? Provide an example of each.

• A. Inhalation hazards affect the respiratory system; example ammonia gas.
• B. Inhalation hazards affect the skin; example solvents like toluene.
• C. Inhalation hazards affect the eyes; example silica dust.
• D. Inhalation hazards affect the nervous system; example caffeine.

Answer: (A)

Exposure route defines the hazard type. An inhalation hazard is a substance that causes harm when its vapors, gases, or dust are breathed in, with the respiratory tract as the main target. Ammonia gas is a clear example: when inhaled, it irritates the nose, throat, and lungs and can cause coughing and breathing irritation, potentially more serious respiratory effects at higher concentrations. Dermal hazards, on the other hand, involve harm from skin contact or absorption through the skin, which can lead to irritation or more systemic effects if the chemical is absorbed. Solvents like toluene illustrate this well, as skin exposure can cause dermatitis and, with enough absorption, systemic toxicity. The other statements mix up the route or primary site of effect for inhalation hazards (for example, blaming the skin or eyes as the main target) or give a compound like caffeine, which is not a typical occupational inhalation hazard. So the correct answer highlights that inhalation hazards affect the respiratory system, with ammonia gas as the example.

Exposure route defines the hazard type. An inhalation hazard is a substance that causes harm when its vapors, gases, or dust are breathed in, with the respiratory tract as the main target. Ammonia gas is a clear example: when inhaled, it irritates the nose, throat, and lungs and can cause coughing and breathing irritation, potentially more serious respiratory effects at higher concentrations.

Dermal hazards, on the other hand, involve harm from skin contact or absorption through the skin, which can lead to irritation or more systemic effects if the chemical is absorbed. Solvents like toluene illustrate this well, as skin exposure can cause dermatitis and, with enough absorption, systemic toxicity.

The other statements mix up the route or primary site of effect for inhalation hazards (for example, blaming the skin or eyes as the main target) or give a compound like caffeine, which is not a typical occupational inhalation hazard. So the correct answer highlights that inhalation hazards affect the respiratory system, with ammonia gas as the example.