A synthetic solvent that helps other ingredients dissolve and spread, but offers no direct skin benefit.
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 synthetic solvent that helps other ingredients dissolve and spread, but offers no direct skin benefit.
Irritation
low
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 solvent used in small amounts; not a star ingredient but generally safe at low concentrations.
Irritation
moderate
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
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
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-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 solvent that helps dissolve other ingredients but may cause irritation in sensitive individuals at high concentrations.
Irritation
moderate
Source
synthetic
A synthetic alcohol that helps dissolve other ingredients and adds scent, but may cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic alcohol used mainly as a solvent or fragrance component; generally safe at low levels but may cause irritation in sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic solvent and fragrance ingredient with limited safety data; best avoided in leave-on products due to potential skin irritation and environmental concerns.
Irritation
moderate
Source
synthetic
Acetone is a powerful but harsh solvent best reserved for quick, targeted removal of nail polish or stubborn adhesives, not for daily facial skincare.
Irritation
high
Source
synthetic
A synthetic plasticizer that helps nail polish stay flexible and resist chipping, but is not a moisturizer or active skincare ingredient.
Irritation
low
Source
synthetic
Alcohol can improve product feel and penetration but is drying and irritating for many skin types, especially at high concentrations.
Irritation
high
Source
synthetic
Amyl alcohol is a solvent that helps dissolve other ingredients, but it can be drying or irritating for sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
Benzoyl Isopropanol is a synthetic solvent and fragrance ingredient with limited safety data; it may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Benzyl benzoate is a common fragrance ingredient that can cause skin irritation in sensitive individuals, especially at higher concentrations.
Irritation
moderate
Source
semi-synthetic
A synthetic solvent that helps other ingredients dissolve and improves product feel, but offers no direct skin benefit.
Irritation
low
Source
synthetic
Butoxydiglycol is a synthetic solvent that helps ingredients blend together, but it can be a mild irritant for sensitive skin.
Irritation
moderate
Source
synthetic
Butoxyethanol is a synthetic solvent that can help dissolve other ingredients, but it carries moderate irritation and toxicity concerns, making it less common in modern skincare.
Irritation
moderate
Source
synthetic
Butyl acetate helps nail polish glide on and dry quickly, but it can be drying or irritating for sensitive skin or frequent use.
Irritation
moderate
Source
synthetic
Butyl alcohol is a solvent rarely used in leave-on skincare; it can be drying and irritating at higher concentrations.
Irritation
moderate
Source
synthetic
Butyl Benzoate is a synthetic solvent and fragrance ingredient that helps dissolve other ingredients but may cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
Butyl ethyl ketone is a strong solvent used mainly in nail products; it can be drying and irritating, and is not a beneficial skincare ingredient.
Irritation
moderate
Source
synthetic
Butyl Glycolate is a synthetic solvent that helps dissolve other ingredients, but it has limited published safety data and may cause irritation in sensitive skin.
Irritation
moderate
Source
synthetic
Butyl Hydroxybutyrate is a mild synthetic ester that helps other ingredients spread and absorb, but it has limited published research on its own benefits.
Irritation
low
Source
synthetic
Butyl lactate is a mild solvent that helps blend ingredients and can temporarily soften the skin, but it's not a star active ingredient.
Irritation
low
Source
synthetic
Butyl Propionate is a safe, low-irritation solvent that helps dissolve other ingredients and adds a mild scent, but it offers no direct skin benefit.
Irritation
low
Source
synthetic
Butylene carbonate is a synthetic solvent that helps dissolve other ingredients and adjust product feel, but it offers no direct skin benefit and is rarely used in leave-on skincare.
Irritation
low
Source
synthetic
A gentle synthetic ester that helps other ingredients spread smoothly, but offers little direct skin benefit.
Irritation
low
Source
synthetic
Butyrolactone is a synthetic solvent used mainly in nail products, but it has limited skincare benefits and may cause irritation at higher levels.
Irritation
moderate
Source
synthetic
A lightweight, non-greasy solvent that helps products spread easily and evaporate quickly, but it's a synthetic ingredient with limited skin benefits beyond texture.
Irritation
low
Source
synthetic
A safe, lightweight synthetic oil that helps products glide on smoothly without clogging pores.
Irritation
low
Source
synthetic
A lightweight, fast-evaporating solvent that helps products glide on smoothly, but may be drying for very dry or sensitive skin types.
Irritation
low
Source
synthetic
A lightweight, volatile hydrocarbon that helps dissolve makeup and spread products without leaving a greasy feel.
Irritation
low
Source
synthetic
A lightweight, volatile solvent that helps products spread smoothly and evaporates quickly, but offers no active skincare benefits.
Irritation
low
Source
synthetic
A lightweight, volatile hydrocarbon blend that helps products glide on smoothly and evaporate quickly without leaving a greasy feel.
Irritation
low
Source
synthetic
A gentle, fast-evaporating solvent that helps products spread smoothly without leaving a greasy feel.
Irritation
low
Source
synthetic
A gentle, lightweight synthetic oil that helps products spread smoothly and dissolve makeup without feeling greasy.
Irritation
low
Source
synthetic
A lightweight, volatile solvent that helps products spread smoothly and evaporate quickly, leaving a non-greasy finish.
Irritation
low
Source
synthetic
A lightweight, volatile hydrocarbon that helps products spread easily and evaporate quickly without leaving a greasy feel.
Irritation
low
Source
synthetic
A lightweight, volatile hydrocarbon that helps dissolve makeup and sebum without leaving a greasy residue.
Irritation
low
Source
synthetic
A lightweight, non-greasy solvent that helps dissolve makeup and sunscreen while leaving a silky feel on skin.
Irritation
low
Source
synthetic
A gentle, fast-evaporating hydrocarbon that helps products spread smoothly without leaving a greasy feel.
Irritation
low
Source
synthetic
A lightweight, volatile solvent that helps products spread smoothly and evaporate quickly, leaving a non-greasy finish.
Irritation
low
Source
synthetic
A lightweight synthetic oil that helps products spread smoothly and dissolve makeup, generally safe for most skin types.
Irritation
low
Source
synthetic
A lightweight synthetic oil that helps products glide on smoothly without a greasy feel.
Irritation
low
Source
synthetic
A safe, lightweight solvent that helps products spread easily and evaporate quickly, but offers no active skincare benefits.
Irritation
low
Source
synthetic
A fast-drying solvent that can help with product texture and acne, but may be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
Cyclohexane is a fast-evaporating solvent that helps dissolve oils and makeup, but it can be drying and potentially irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic solvent that helps products spread and dry evenly, but offers no direct skin benefit.
Irritation
low
Source
synthetic
Cyclohexanol is a synthetic solvent used in small amounts; it has moderate irritation potential and is not a beneficial skincare ingredient.
Irritation
moderate
Source
synthetic
Cyclohexanone is a strong solvent with significant irritation and safety concerns; it is rarely used in leave-on skincare and is best avoided in daily products.
Irritation
high
Source
synthetic
Cyclohexyl Toluate is a synthetic ester that helps dissolve other ingredients and leaves a light, non-greasy feel on skin.
Irritation
low
Source
synthetic
Cyclopentanone is a synthetic solvent with limited direct skincare benefits; it may cause irritation in sensitive individuals and is best avoided in leave-on products.
Irritation
moderate
Source
synthetic
Denatured alcohol evaporates quickly to give a matte finish but can strip the skin's moisture barrier, making it best for oily or acne-prone skin and risky for dry or sensitive types.
Irritation
high
Source
synthetic
Diacetone alcohol is a synthetic solvent that helps dissolve other ingredients, but it can be drying and may cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
Dibenzyl is a synthetic solvent and fragrance ingredient with moderate irritation potential; it is not a primary active but may appear in small amounts in scented products.
Irritation
moderate
Source
synthetic
Dibutoxymethane is a synthetic solvent that helps products spread and dry quickly, but it can be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
Dibutyl Oxalate is a synthetic solvent found mainly in nail products; it helps ingredients blend and dry, but there is limited safety data for leave-on skincare.
Irritation
moderate
Source
synthetic