Question

How do antiseptics differ from disinfectants?

Hint:

Remember: Antiseptic is for Animate (living) things. Disinfectant is for Dormant (inanimate) things.

Answer 1

Concept: Antiseptics and disinfectants are both antimicrobial agents that kill or inhibit the growth of microorganisms. The fundamental difference between them lies in the type of surface they are applied to and their relative toxicity.
• Antiseptics: These are chemical substances that kill or prevent the growth of microorganisms and are safe to be applied to living tissues such as wounds, cuts, ulcers, and diseased skin surfaces. Examples include Dettol (a mixture of chloroxylenol and terpineol) and Savlon. • Disinfectants: These are chemical agents that kill microorganisms but are toxic to living tissues. Therefore, they are applied only to non-living (inanimate) objects such as floors, drainage systems, and surgical instruments. Examples include chlorine and sulphur dioxide in low concentrations.
[h] |p4cm|p4cm|p4cm| Feature & Antiseptics & Disinfectants
Application Surface & Living tissues (skin, wounds). & Inanimate objects (floors, toilets).
Toxicity & Low toxicity; non-irritating to skin. & High toxicity; harmful to living tissues.
Purpose & Prevent infection and sepsis. & Sterilize surfaces and prevent disease spread.
Examples & Iodoform, Boric acid, Dettol. & Phenol (1%), Chlorine (0.2-0.4 ppm).

Interestingly, the same substance can act as both an antiseptic and a disinfectant depending on its concentration. For example: • 0.2% solution of Phenol acts as an antiseptic. • 1.0% solution of Phenol acts as a disinfectant.