Ingredient review
SD Alcohol 23-F
INCI: SD ALCOHOL 23-F
Effective for quick-drying and oil control, but can be drying and irritating for sensitive or dry skin.
In plain English
SD Alcohol 23-F is a type of denatured alcohol—ethanol with additives to make it undrinkable. In skincare, it helps ingredients dissolve, makes products feel lightweight, and evaporates quickly. However, it can strip the skin's natural oils, leading to dryness and irritation, especially with frequent use.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is relatively strong for its common cosmetic role.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- strong
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
SD Alcohol 23-F can be useful, but watch for some irritation potential.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging SD Alcohol 23-F.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
strongThere is a stronger practical or research basis for the ingredient role described here.
What it is
A denatured alcohol (ethanol with denaturants) used in cosmetics as a solvent and antimicrobial agent.
How it works
It dissolves oil and dirt, evaporates rapidly to create a dry feel, and kills bacteria on the skin's surface. It also helps other ingredients penetrate more effectively.
Pros
Fast evaporation
Creates a non-greasy, matte finish that many with oily skin prefer.
Antimicrobial action
Helps reduce acne-causing bacteria on the skin, making it useful in acne treatments.
Cons and cautions
Drying effect
Repeated use can strip natural oils, leading to dryness, flakiness, and irritation.
Barrier disruption
Can weaken the skin's protective barrier over time, increasing sensitivity and water loss.
Best for
- People with oily or acne-prone skin looking for quick-drying formulas
- Those who tolerate alcohol well and want a lightweight texture
Use caution if
- People with dry, sensitive, or compromised skin barriers
- Those with rosacea, eczema, or active inflammation
Usage tips
Safety summary
Generally safe in low concentrations and for short-term use, but can cause irritation and dryness with frequent or high-concentration application. Not recommended for sensitive or dry skin.
Research notes
Clinical studies confirm that ethanol-based products can disrupt the skin barrier and increase transepidermal water loss (TEWL) with repeated use. However, they are effective antimicrobials and solvents in controlled formulations.
Common label clues
- Typical concentration
- 1% to 50% depending on product type
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng. Must be denatured to prevent ingestion.
- Common uses
- Toners, Cleansers, Acne treatments, Sunscreens
- Environmental note
- Produced synthetically from petrochemical or fermentation sources. Denaturants may have environmental concerns if not properly disposed.
Good to know
- SD Alcohol 23-F is specifically denatured with a formula that meets FDA regulations for cosmetics.
- Not all alcohols in skincare are bad—fatty alcohols like cetyl alcohol are moisturizing.
Common questions
What is SD Alcohol 23-F in beauty products?
SD Alcohol 23-F is a type of denatured alcohol—ethanol with additives to make it undrinkable. In skincare, it helps ingredients dissolve, makes products feel lightweight, and evaporates quickly. However, it can strip the skin's natural oils, leading to dryness and irritation, especially with frequent use.
What does SD Alcohol 23-F do in a beauty product?
It dissolves oil and dirt, evaporates rapidly to create a dry feel, and kills bacteria on the skin's surface. It also helps other ingredients penetrate more effectively.
Is SD Alcohol 23-F safe for most people?
Generally safe in low concentrations and for short-term use, but can cause irritation and dryness with frequent or high-concentration application. Not recommended for sensitive or dry skin.
Who should be careful with SD Alcohol 23-F?
People with dry, sensitive, or compromised skin barriers Those with rosacea, eczema, or active inflammation
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.