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Microbiology, 2021

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13.3 • Using Chemicals to Control Microorganisms 545<br />

Chemical Disinfectants<br />

Chemical Mode of Action Example Uses<br />

Chlorhexidine<br />

Alexidine<br />

Disruption of cell membranes<br />

Oral rinse<br />

Hand scrub for medical<br />

personnel<br />

Alkylating Agents<br />

Formaldehyde<br />

Glutaraldehyde<br />

o-Phthalaldehyde<br />

Ethylene oxide<br />

β-<br />

Propionolactone<br />

Inactivation of enzymes and nucleic acid<br />

Disinfectant<br />

Tissue specimen storage<br />

Embalming<br />

Sterilization of medical<br />

equipment<br />

Vaccine component for<br />

sterility<br />

Peroxygens<br />

Hydrogen<br />

peroxide<br />

Peracetic acid<br />

Benzoyl peroxide<br />

Carbamide<br />

peroxide<br />

Ozone gas<br />

Oxidation and destabilization of cellular<br />

macromolecules<br />

Antiseptic<br />

Disinfectant<br />

Acne medication<br />

Toothpaste ingredient<br />

Supercritical Gases<br />

Carbon dioxide<br />

Penetrates cells, forms carbonic acid, lowers<br />

intracellular pH<br />

Food preservation<br />

Disinfection of medical<br />

devices<br />

Disinfection of transplant<br />

tissues<br />

Chemical Food Preservatives<br />

Sorbic acid<br />

Benzoic acid<br />

Propionic acid<br />

Potassium<br />

sorbate<br />

Sodium benzoate<br />

Calcium<br />

propionate<br />

Sulfur dioxide<br />

Nitrites<br />

Decrease pH and inhibit enzymatic function<br />

Preservation of food<br />

products<br />

Natural Food Preservatives

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