Ingredient review
Octahydro-Methyl-Methanonaphthalenone
INCI: OCTAHYDRO-METHYL-METHANONAPHTHALENONE
A synthetic fragrance compound that adds a warm, woody scent but offers no skincare benefits and may be a concern for those with fragrance sensitivities.
In plain English
This is a man-made chemical that gives products a pleasant woody or amber-like smell. It doesn't moisturize, treat, or improve your skin in any way—it's purely for scent. While generally considered safe at low levels, it can still cause irritation or allergic reactions in people with sensitive skin or fragrance allergies.
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-Methyl-Methanonaphthalenone 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-Methyl-Methanonaphthalenone.
- 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 family of sesquiterpenoid ketones, created in a lab to mimic natural woody or amber scents found in essential oils like patchouli or cedarwood.
How it works
It functions solely as a fragrance ingredient, binding to olfactory receptors to produce a scent. It has no active role in skin hydration, barrier repair, or other cosmetic benefits.
Pros
Pleasant Scent
Adds a warm, woody, or amber-like aroma that many people find appealing in lotions, creams, and perfumes.
Low Irritation for Most
At typical low concentrations, it rarely causes irritation in people without fragrance sensitivities.
Cons and cautions
No Skincare Benefit
This ingredient does not hydrate, soothe, or protect the skin—it only provides scent, so it adds no functional value to a skincare routine.
Potential Allergen
Like many synthetic fragrances, it can trigger allergic reactions or contact dermatitis in sensitive individuals, especially with repeated use.
Best for
- Those who enjoy woody fragrances in their products
- People without fragrance sensitivities
Use caution if
- Individuals with known fragrance allergies or very sensitive skin
Usage tips
Safety summary
Generally recognized as safe for use in cosmetics at low levels by industry panels, but can cause allergic reactions in sensitive individuals. No known serious health risks from typical cosmetic exposure.
Research notes
Limited peer-reviewed studies specifically on this compound; safety is inferred from broader fragrance ingredient assessments by bodies like IFRA and RIFM.
Common label clues
- Typical concentration
- Typically used at very low levels, often below 1% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU and US at low concentrations, but must be listed as a fragrance allergen if present above certain thresholds in the EU.
- Common uses
- Fragranced skincare, Perfumes, Body lotions, Hair products
- Environmental note
- As a synthetic compound, its environmental persistence is not well-studied, but it is not derived from natural resources.
Good to know
- This ingredient is often listed under the generic term 'fragrance' or 'parfum' on labels, so you may not see it by name.
- It is not related to any natural plant extracts despite its complex chemical name.
Common questions
What is Octahydro-Methyl-Methanonaphthalenone in beauty products?
This is a man-made chemical that gives products a pleasant woody or amber-like smell. It doesn't moisturize, treat, or improve your skin in any way—it's purely for scent. While generally considered safe at low levels, it can still cause irritation or allergic reactions in people with sensitive skin or fragrance allergies.
What does Octahydro-Methyl-Methanonaphthalenone do in a beauty product?
It functions solely as a fragrance ingredient, binding to olfactory receptors to produce a scent. It has no active role in skin hydration, barrier repair, or other cosmetic benefits.
Is Octahydro-Methyl-Methanonaphthalenone safe for most people?
Generally recognized as safe for use in cosmetics at low levels by industry panels, but can cause allergic reactions in sensitive individuals. No known serious health risks from typical cosmetic exposure.
Who should be careful with Octahydro-Methyl-Methanonaphthalenone?
Individuals with known fragrance allergies or very sensitive skin
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.