What is tert-butyl alcohol used for in cosmetics?

tert-Butyl alcohol is primarily used as a solvent to dissolve other ingredients and as a denaturant for ethanol in cosmetic formulations. It helps to create a stable and well-mixed product.

Is tert-butyl alcohol safe for sensitive skin?

While generally considered safe in cosmetic concentrations, tert-butyl alcohol can be mildly irritating or drying for some individuals, especially those with sensitive skin. Patch testing is advisable if you have concerns.

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tert-Butyl Alcohol

Also known as: TBA, 2-Methyl-2-propanol, tert-Butanol

tert-Butyl alcohol is a clear, colorless liquid used as a solvent in various cosmetic and personal care products. It helps dissolve other ingredients and can also be used as a denaturant for alcohol. Its primary role is to improve the texture and stability of formulations.

SolventVegan

BenefitNone 0 / 4

RiskLow 1 / 4

Irritation i1 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Systemic exposure i0.5 / 4

Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.

Sensitization i0.5 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

May cause mild skin irritation
Can be drying to the skin

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Products with tert-Butyl Alcohol

Beauty of Joseon

Relief Sun: Rice + Probiotics SPF50+ PA++++

4.8/ 525/15/1

Vichy

Neovadiol Magistral Night Firming Nourishing Cream

4.4/ 514/14/5

Dolomia

Rose Therapy Crema Ricca

3.2/ 516/26/17

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Frequently asked questions

What is tert-butyl alcohol used for in cosmetics?: tert-Butyl alcohol is primarily used as a solvent to dissolve other ingredients and as a denaturant for ethanol in cosmetic formulations. It helps to create a stable and well-mixed product.
Is tert-butyl alcohol safe for sensitive skin?: While generally considered safe in cosmetic concentrations, tert-butyl alcohol can be mildly irritating or drying for some individuals, especially those with sensitive skin. Patch testing is advisable if you have concerns.