Ingredient review
Octahydro Tetramethyl Cyclopropanaphthalenone
INCI: OCTAHYDRO-TETRAMETHYLCYCLOPROPANAPHTHALENONE
A synthetic fragrance ingredient that adds a warm, woody scent; generally safe at low levels but offers no skincare benefit.
In plain English
This is a man-made chemical used purely to give a product a pleasant woody or ambery smell. It doesn't moisturize, treat, or improve your skin in any way—it's just there for the scent. In tiny amounts, it's considered safe, but if you have sensitive skin or prefer fragrance-free products, you might want to avoid it.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Octahydro Tetramethyl Cyclopropanaphthalenone is generally a lower-concern ingredient when the full formula suits your skin.
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 Octahydro Tetramethyl Cyclopropanaphthalenone.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic organic compound from the cyclopropanaphthalenone family, created in a lab to mimic natural woody-ambery notes found in ingredients like ambergris or cedarwood.
How it works
It interacts with olfactory receptors in your nose to produce a scent perception. In a cosmetic formula, it simply contributes to the overall fragrance profile and has no active effect on skin structure or function.
Pros
Pleasant scent profile
Adds a warm, woody-amber note that many find appealing and sophisticated.
Low irritation potential
At typical use levels, it rarely causes irritation for most skin types.
Cons and cautions
No skin benefit
This ingredient only adds fragrance; it does not hydrate, soothe, or improve skin health.
Potential allergen
Like all fragrance ingredients, it can cause allergic reactions in sensitive individuals, though uncommon.
Best for
- People who enjoy fragranced body care
- Those looking for a warm, sophisticated scent in their products
Use caution if
- Individuals with fragrance allergies or sensitive skin
- Anyone following a fragrance-free skincare routine
Usage tips
Safety summary
Generally recognized as safe for cosmetic use at low concentrations. Rare cases of skin sensitization have been reported, consistent with other fragrance ingredients.
Research notes
Limited peer-reviewed research specifically on this compound. Safety is inferred from broader fragrance ingredient assessments by organizations like IFRA and the Research Institute for Fragrance Materials (RIFM).
Common label clues
- Typical concentration
- Very low, typically less than 1% in finished products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other countries, subject to concentration limits and safety assessments by bodies like IFRA.
- Common uses
- Perfumes, Fragranced lotions, Body washes, Hair products
- Environmental note
- As a synthetic compound, its environmental persistence is not well-documented; natural fragrance alternatives may be more biodegradable.
Good to know
- This ingredient is often listed near the end of an INCI list, indicating a very low concentration.
- Fragrance ingredients do not need to be individually disclosed on labels in many regions, so you may see it simply as 'fragrance' or 'parfum'.
Common questions
What is Octahydro Tetramethyl Cyclopropanaphthalenone in beauty products?
This is a man-made chemical used purely to give a product a pleasant woody or ambery smell. It doesn't moisturize, treat, or improve your skin in any way—it's just there for the scent. In tiny amounts, it's considered safe, but if you have sensitive skin or prefer fragrance-free products, you might want to avoid it.
What does Octahydro Tetramethyl Cyclopropanaphthalenone do in a beauty product?
It interacts with olfactory receptors in your nose to produce a scent perception. In a cosmetic formula, it simply contributes to the overall fragrance profile and has no active effect on skin structure or function.
Is Octahydro Tetramethyl Cyclopropanaphthalenone safe for most people?
Generally recognized as safe for cosmetic use at low concentrations. Rare cases of skin sensitization have been reported, consistent with other fragrance ingredients.
Who should be careful with Octahydro Tetramethyl Cyclopropanaphthalenone?
Individuals with fragrance allergies or sensitive skin Anyone following a fragrance-free skincare routine
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.