Which statement differentiates antiseptic from disinfectant?

Which statement differentiates antiseptic from disinfectant?

• A. Disinfectant is used on living tissue; antiseptic is used on inanimate surfaces
• B. Antiseptic is used on living tissue; disinfectant is used on inanimate surfaces
• C. Both are used interchangeably on any surface
• D. Antiseptic kills spores; disinfectant does not

Answer: (B)

The key distinction is where they’re used safely. Antiseptics are formulated for use on living tissue—skin and mucous membranes—because they are effective against microbes while being gentle enough not to injure tissue. Disinfectants are meant for inanimate surfaces and objects; they’re typically more potent and can be toxic to living tissues, so they aren’t used on people. That’s why the correct statement is that antiseptic is used on living tissue and disinfectant is used on inanimate surfaces. The other options misstate the safety contexts or rely on properties (like sporicidal activity) that aren’t the defining difference.

The key distinction is where they’re used safely. Antiseptics are formulated for use on living tissue—skin and mucous membranes—because they are effective against microbes while being gentle enough not to injure tissue. Disinfectants are meant for inanimate surfaces and objects; they’re typically more potent and can be toxic to living tissues, so they aren’t used on people. That’s why the correct statement is that antiseptic is used on living tissue and disinfectant is used on inanimate surfaces. The other options misstate the safety contexts or rely on properties (like sporicidal activity) that aren’t the defining difference.