Ingredient review

Hexahydro Tetramethyl Methanonaphthalene Methyl Acetate

INCI: HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE-8-METHYL ACETATE

A synthetic fragrance ingredient that adds a warm, woody scent; generally safe at low concentrations but may cause sensitivity in some individuals.

beautyskincarefragrance

In plain English

This is a man-made chemical added to products to give them a pleasant woody or amber-like smell. It's used in tiny amounts, so it's not likely to cause problems for most people, but if you have very sensitive skin or a fragrance allergy, you might want to avoid it.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

Hexahydro Tetramethyl Methanonaphthalene Methyl Acetate 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Hexahydro Tetramethyl Methanonaphthalene Methyl Acetate.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic organic compound from the class of polycyclic musks, specifically designed to mimic natural woody and amber notes in fragrances.

How it works

It works by binding to olfactory receptors in the nose, creating the perception of a warm, woody scent. In a product, it simply provides fragrance and has no active skincare function.

Pros

Pleasant Scent

Adds a warm, woody, amber-like fragrance that many find appealing and long-lasting.

Low Irritation Potential

At typical low concentrations, it is generally non-irritating for most skin types.

Cons and cautions

Potential Allergen

As a synthetic fragrance, it can be a contact allergen for people with fragrance sensitivities, causing redness or itching.

No Skincare Benefit

It only provides scent and does not moisturize, protect, or improve skin health.

Best for

  • People who enjoy woody, amber fragrances in their skincare
  • Those without known fragrance sensitivities

Use caution if

  • Individuals with diagnosed fragrance allergies or very sensitive skin

Usage tips

Patch test any new product containing this ingredient on a small area of skin before full use.
If you have sensitive skin, opt for fragrance-free versions of products to avoid potential irritation.

Safety summary

Generally recognized as safe for use in cosmetics at low concentrations by industry panels, but may cause allergic reactions in sensitive individuals.

Research notes

Limited peer-reviewed studies specifically on this compound; safety is inferred from broader research on similar synthetic musks and fragrance ingredients.

Common label clues

Typical concentration
Typically used at very low levels, often below 1% in finished products.
Regulatory status
Approved for use in cosmetics in the EU and US at low concentrations. Subject to fragrance allergen labeling requirements in the EU.
Common uses
Perfumes, Fragranced Skincare, Body Lotions, Hair Products
Environmental note
As a synthetic compound, its environmental persistence is not fully characterized; some polycyclic musks have raised concerns about bioaccumulation in aquatic life.

Good to know

  • This ingredient is often listed near the end of an INCI list, indicating it is used in very small amounts.
  • Fragrance ingredients are not required to be individually listed on labels in many regions, so this specific compound may be hidden under 'parfum' or 'fragrance'.

Common questions

What is Hexahydro Tetramethyl Methanonaphthalene Methyl Acetate in beauty products?

This is a man-made chemical added to products to give them a pleasant woody or amber-like smell. It's used in tiny amounts, so it's not likely to cause problems for most people, but if you have very sensitive skin or a fragrance allergy, you might want to avoid it.

What does Hexahydro Tetramethyl Methanonaphthalene Methyl Acetate do in a beauty product?

It works by binding to olfactory receptors in the nose, creating the perception of a warm, woody scent. In a product, it simply provides fragrance and has no active skincare function.

Is Hexahydro Tetramethyl Methanonaphthalene Methyl Acetate safe for most people?

Generally recognized as safe for use in cosmetics at low concentrations by industry panels, but may cause allergic reactions in sensitive individuals.

Who should be careful with Hexahydro Tetramethyl Methanonaphthalene Methyl Acetate?

Individuals with diagnosed fragrance allergies or very sensitive skin

Research sources

European Chemicals Agency (ECHA) - Substance InfoOpenCosmetic Ingredient Review (CIR) - Fragrance Ingredients SafetyOpenPubMed - Synthetic Musks and Skin SensitizationOpen

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.