A chemical used to disinfect or kill organisms is called a disinfectant or antiseptic.

Here's the breakdown:

* Disinfectants: These are typically used on inanimate objects, like surfaces, instruments, and equipment. They kill or inactivate a wide range of harmful microorganisms.

* Antiseptics: These are designed for use on living tissue, such as skin and wounds. They are generally less harsh than disinfectants and aim to reduce the number of microorganisms on the surface.

Examples of disinfectants and antiseptics:

* Bleach: A powerful disinfectant commonly used to clean surfaces and laundry.

* Alcohol: A commonly used antiseptic for cleaning skin and wounds.

* Hydrogen peroxide: An antiseptic that can be used to clean wounds and disinfect surfaces.

* Chlorhexidine: An antiseptic frequently used in healthcare settings for surgical scrubs and wound care.

* Iodine: An antiseptic commonly used in hospitals and first-aid kits.

It's important to remember that each disinfectant or antiseptic has different strengths and limitations. Always follow the manufacturer's instructions for safe and effective use.