A gentle synthetic ester that softens skin and improves product texture, with low irritation potential.
Irritation
low
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
A gentle synthetic ester that softens skin and improves product texture, with low irritation potential.
Irritation
low
Source
synthetic
A synthetic scent ingredient that adds a unique earthy note but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic fragrance compound that adds a fresh, green scent but may cause irritation in sensitive individuals at higher concentrations.
Irritation
moderate
Source
synthetic
A gentle humectant that helps hydrate skin and improve product texture without common irritation.
Irritation
low
Source
synthetic
A gentle, multifunctional ingredient that helps keep products fresh and your skin hydrated without irritation.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that helps skin feel smooth and soft without clogging pores.
Irritation
low
Source
synthetic
A synthetic solvent that helps other ingredients dissolve and spread, but offers no direct skin benefit.
Irritation
low
Source
synthetic
1,5-Naphthalenediol is a synthetic antioxidant and color stabilizer, but its use in cosmetics is limited and safety data is sparse.
Irritation
moderate
Source
synthetic
A gentle, effective humectant that also helps preserve your products without the sting of traditional preservatives.
Irritation
low
Source
synthetic
A fragrant compound from mint oils that adds a fresh scent but may cause irritation in sensitive individuals.
Irritation
moderate
Source
natural
A gentle, naturally derived fatty acid that helps calm and condition the skin, with emerging research supporting its soothing benefits.
Irritation
low
Source
natural
A gentle, naturally derived fatty acid that helps soothe and protect the skin, often found in royal jelly-based products.
Irritation
low
Source
natural
A gentle, non-irritating exfoliating acid that helps smooth skin texture without the sting of stronger acids.
Irritation
low
Source
semi-synthetic
A synthetic fragrance ingredient that adds a pleasant scent but offers no skincare benefits; generally safe at low levels.
Irritation
low
Source
synthetic
A synthetic fragrance compound with limited safety data; best avoided by those with sensitive skin or fragrance allergies.
Irritation
moderate
Source
synthetic
2-Acetonaphthone is a synthetic fragrance ingredient with limited safety data; it is generally considered safe at low levels but may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
2-Benzylheptanol is a synthetic fragrance ingredient that adds a pleasant scent to products; it is generally considered safe at low concentrations but may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
2-Decenal is a synthetic fragrance ingredient that adds a fresh citrus note but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
2-Dodecenol is a synthetic fatty alcohol used for scent and preservation, but it may cause irritation in sensitive individuals at higher concentrations.
Irritation
moderate
Source
synthetic
A synthetic alcohol used as a solvent or denaturant; can be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic fragrance ingredient that adds a fruity, cheesy scent but offers no direct skincare benefit and may irritate sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic solvent used in small amounts; not a star ingredient but generally safe at low concentrations.
Irritation
moderate
Source
synthetic
A synthetic fragrance ingredient that adds a fresh scent but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
2-Heptanol is a synthetic fragrance ingredient that adds scent but offers no skincare benefits and may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
2-Hexanol is a synthetic fragrance ingredient that adds scent to products but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
2-Hydroxyethyl acrylate is a synthetic raw material used to create polymers that improve product texture and stability, but it is rarely found as a standalone ingredient in consumer products.
Irritation
moderate
Source
synthetic
2-Isopentenal is a synthetic fragrance compound with limited safety data; it may cause skin irritation in sensitive individuals and is best avoided in leave-on products for reactive skin.
Irritation
moderate
Source
synthetic
2-M-Cresylethanol is a synthetic fragrance ingredient with mild antimicrobial properties, but it may cause skin irritation in sensitive individuals at higher concentrations.
Irritation
moderate
Source
synthetic
2-Melozol Acetate is a little-known synthetic ingredient with limited research; its benefits and safety are not well-established, so approach with caution.
Irritation
low
Source
synthetic
2-Melozol Formate is a little-known synthetic antioxidant that may help protect skin from environmental stress, but research is very limited.
Irritation
low
Source
synthetic
2-Methoxy-p-Cresol is a synthetic fragrance ingredient that adds a smoky, spicy note to products, but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic scent ingredient that adds a pleasant floral note, but offers no skincare benefits and may be a concern for those avoiding fragrance.
Irritation
low
Source
synthetic
A small alcohol molecule used mainly as a solvent or fragrance ingredient; it has limited direct skin benefit and may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic fragrance ingredient that adds a fresh, floral scent but offers no skincare benefits and may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
A potent synthetic odorant rarely used in skincare; its strong sulfurous smell limits its appeal and may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
2-Methylbutanol is a small alcohol used to dissolve other ingredients or add scent, but it can be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A fruity-smelling ester used to add a pleasant apple-like scent to products; generally considered safe at low concentrations but may cause irritation in sensitive individuals.
Irritation
low
Source
synthetic
A synthetic ester that adds a fruity, floral scent to products; generally considered safe at low levels but may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
A synthetic scent ingredient that adds a warm, nutty aroma but offers no skincare benefit and may cause sensitivity in some people.
Irritation
low
Source
synthetic
A natural fatty acid used mainly for its cheesy or fruity scent; safe at low levels but not a functional skincare active.
Irritation
low
Source
natural
A synthetic scent ingredient that adds a fresh, citrusy note but offers no skincare benefits and may be a concern for those with fragrance sensitivities.
Irritation
low
Source
synthetic
A synthetic fragrance compound used in tiny amounts to add a savory or roasted note; generally considered safe at low concentrations but may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
A synthetic fragrance ingredient that adds a fruity, acidic scent but may cause irritation in sensitive individuals at higher concentrations.
Irritation
moderate
Source
synthetic
A synthetic fragrance ester that adds a fruity or floral note but offers no skincare benefit beyond scent.
Irritation
low
Source
synthetic
A synthetic fragrance ingredient that adds scent but offers no skin benefit and may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic fragrance ester that adds a pleasant scent but offers no skincare benefits; safe at low concentrations but may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
A potent synthetic brightener that targets dark spots and uneven tone, but can be irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic fragrance aldehyde that adds a fresh, green scent but can be a skin sensitizer for some people.
Irritation
moderate
Source
synthetic
A synthetic preservative booster that helps keep products fresh but may cause irritation for sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
2-Octanol is a mild fatty alcohol that helps dissolve other ingredients and can boost preservative effectiveness, but it's not a primary active ingredient.
Irritation
low
Source
synthetic
2-Octenal is a synthetic fragrance compound that adds a fresh, green scent but can be a skin sensitizer for some people.
Irritation
moderate
Source
synthetic
2-P-Cresylethanol is a synthetic fragrance ingredient with mild preservative-boosting properties, generally considered safe at low concentrations but may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
2-Pentanol is a solvent alcohol that can help dissolve other ingredients but may be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic fragrance ingredient with limited safety data; generally considered low risk at typical use levels but may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
A synthetic scent ingredient that adds a fresh note but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic scent ingredient that adds a pleasant fruity-woody note but offers no skincare benefits and may cause sensitivity in some individuals.
Irritation
low
Source
synthetic
A synthetic cooling agent that adds a refreshing feel but may irritate sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
A synthetic cooling and minty fragrance ingredient that can add a pleasant sensation but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Fragrance Ingredient
2-TERT-BUTYL-4-METHYL-CYCLOHEXANOL ACETATE
A synthetic scent ingredient that adds a pleasant aroma but offers no skincare benefit and may cause sensitivity in some people.
Irritation
low
Source
synthetic
A synthetic cooling agent that adds a fresh, minty scent to products; generally well-tolerated but may cause irritation in sensitive individuals at high levels.
Irritation
low
Source
synthetic