Written and maintained by CASRAI Editorial Board
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This page describes products and general use; it is not medical advice.
An antiseptic is a chemical product applied to skin or living tissue to reduce microorganisms, as opposed to a disinfectant, which is used on objects and surfaces. The distinction matters in health care because the same active ingredient can be formulated and regulated differently depending on which job it is meant to do. This guide explains what an antiseptic is, how it differs from a disinfectant, how FDA categorizes health care antiseptics, and what that means for the people who stock them.
Who uses it: clinic and hospital staff, infection-prevention and supply teams, and students learning the vocabulary of infection control.
What an Antiseptic Is
An antiseptic is a product intended for use on skin or tissue. The US Centers for Disease Control and Prevention (CDC) describes iodine solutions and tinctures as having “long been used by health professionals primarily as antiseptics on skin or tissue.” The purpose is to lower the number of microorganisms at a site, for example on a patient’s skin before a procedure or on a clinician’s hands.
Antiseptic vs Disinfectant
An antiseptic is made for living tissue; a disinfectant is made for inanimate surfaces and devices. The two are not interchangeable, and the CDC’s Guideline for Disinfection and Sterilization in Healthcare Facilities shows why, using iodophors as the example:
- Iodophors “have been used both as antiseptics and disinfectants.”
- Iodophors formulated as antiseptics “contain less free iodine than do those formulated as disinfectants.”
- “Antiseptic iodophors are not suitable for use as hard-surface disinfectants because of concentration differences.”
In practice, the product label states the intended use. A product labelled as an antiseptic should not be used to disinfect a bench or a device, and a surface disinfectant should not be used on skin. For a single, common antiseptic product, see what an alcohol swab is.
Health Care Antiseptic Categories
When FDA finalized its rule on over-the-counter (OTC) health care antiseptic drug products, it defined the scope by where and how the products are used. The rule covers antiseptics used by health care professionals in hospitals and other health care settings.
| Category | Form |
|---|---|
| Health care personnel hand rub | Rub |
| Surgical hand rub | Rub |
| Patient antiseptic skin preparation | Rub |
| Health care personnel hand wash | Wash |
| Surgical hand scrub | Wash |
Source: FDA final rule, OTC health care antiseptic drug products, Federal Register, 2017-12-20. FDA evaluates consumer antiseptic washes and rubs separately from this rule.
How FDA Treats Antiseptic Ingredients
The 2017 final rule, effective December 20, 2018, determined that 24 active ingredients are not generally recognized as safe and effective for these health care uses. OTC health care antiseptic products containing them are treated as new drugs that need approval under section 505 of the Federal Food, Drug, and Cosmetic Act.
FDA deferred further rulemaking on six ingredients, so they were not part of the 24: benzalkonium chloride, benzethonium chloride, chloroxylenol, alcohol (ethanol), isopropyl alcohol and povidone-iodine. For these six, the rule makes no determination of whether they are generally recognized as safe and effective; their status is to be addressed after ongoing studies are completed or at a later date.
| Group | Ingredients named in the rule | Status under the rule |
|---|---|---|
| Deferred | Benzalkonium chloride, benzethonium chloride, chloroxylenol, alcohol, isopropyl alcohol, povidone-iodine | No safe-and-effective determination made in this rule; deferred |
| Not generally recognized as safe and effective | 24 active ingredients | OTC products are new drugs needing approval |
Safe Use and Handling Basics
- Use the product only for the purpose on its label: skin antiseptics on skin, surface disinfectants on surfaces.
- Follow the manufacturer’s instructions for use, including any warnings.
- Sterile technique and sterile supplies are separate from antisepsis, as with sterile drapes and the practices in the CLABSI prevention bundle.
- For antisepsis at an injection site, see skin antisepsis before injection.
Common Mistakes
- Using an antiseptic as a surface disinfectant. The CDC notes that antiseptic iodophors are not suitable as hard-surface disinfectants because of concentration differences.
- Assuming one ingredient means one product. The CDC notes iodophors are formulated differently as antiseptics and as disinfectants.
- Assuming every antiseptic product falls under the health care rule. FDA’s 2017 rule covers health care settings; consumer products are evaluated separately.
FAQ
Is an antiseptic the same as a disinfectant?
No. An antiseptic is applied to skin or tissue; a disinfectant is used on surfaces and devices. Iodophors show the difference: antiseptic formulations contain less free iodine than disinfectant formulations (CDC).
Can I use a disinfectant on skin?
Use a product only as its label directs. Surface disinfectants are formulated for surfaces, not skin, so they are not a substitute for an antiseptic made for skin.
What is an antiseptic used for?
In health care, FDA’s rule lists hand rubs and washes for staff, surgical hand rubs and scrubs, and antiseptic skin preparation for patients before procedures.
Are antiseptics regulated?
OTC health care antiseptics are regulated by FDA as drugs. Under the 2017 rule, 24 ingredients are not generally recognized as safe and effective for health care use, and six were deferred for later action.
Sources
- FDA, Safety and Effectiveness of Health Care Antiseptics; Topical Antimicrobial Drug Products for Over-the-Counter Human Use, Final Rule, Federal Register, 2017-12-20 (FR Doc 2017-27317): govinfo.gov. Date checked: 2026-10-29.
- CDC, Guideline for Disinfection and Sterilization in Healthcare Facilities, chemical disinfectants (iodine): cdc.gov. Date checked: 2026-10-29.
