What is 1,2-Hexanediol used for in skincare?

1,2-Hexanediol serves multiple roles in skincare products, primarily as a solvent to help other ingredients mix, a humectant to draw moisture to the skin, and a preservative booster to improve product shelf-life.

Is 1,2-Hexanediol safe for sensitive skin?

While generally considered safe, 1,2-Hexanediol can cause mild irritation in some individuals, particularly those with very sensitive skin. Patch testing is always recommended if you have concerns.

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1,2-Hexanediol

1,2-Hexanediol is a synthetic organic compound that functions as a solvent, humectant, and preservative booster in cosmetic formulations. It helps dissolve other ingredients, attracts and holds moisture in the skin, and enhances the efficacy of preservatives. This ingredient contributes to product stability and texture.

Solvent, humectant, preservative boosterVegan

BenefitMinimal 0.8 / 4

Hydration i1.5 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

Barrier support i0.5 / 4

Whether it supports the skin barrier — restoring lipids, reducing water loss, aiding barrier repair, or strengthening the skin’s protective function.

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.

Eye irritation i1 / 4

Whether it may sting or irritate around the eyes. Relevant for sunscreens, fragrances, acids, surfactants, and volatile ingredients.

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.

What it helps with

Enhances product stability
Boosts preservative efficacy
Provides mild hydration

Things to watch

Potential for mild irritation

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Products with 1,2-Hexanediol

Anua

Rice 70 Glow Milky Toner

4.8/ 523/14/1

SKIN1004

Madagascar Centella Hyalu‑Cica Hydrating Mask

4.8/ 526/16/2

Anua

Azelaic Acid 10 Hyaluron Redness Soothing Serum

4.7/ 525/8/2

SKIN1004

Madagascar Centella Tone Brightening Capsule Ampoule

4.7/ 516/9/1

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Frequently asked questions

What is 1,2-Hexanediol used for in skincare?: 1,2-Hexanediol serves multiple roles in skincare products, primarily as a solvent to help other ingredients mix, a humectant to draw moisture to the skin, and a preservative booster to improve product shelf-life.
Is 1,2-Hexanediol safe for sensitive skin?: While generally considered safe, 1,2-Hexanediol can cause mild irritation in some individuals, particularly those with very sensitive skin. Patch testing is always recommended if you have concerns.