N-Hydroxysuccinimide

N-hydroxysuccinimide is a water-soluble succinimide derivative used in cosmetic chemistry as a chelating and coupling agent, used to improve formula stability and support complexes aimed at uneven tone, though evidence in topical care is limited.
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Ingredient Snapshot

Overview
A stabilizing ingredient sometimes paired with tone-evening actives.
Category
Hyperpigmentation, Tone/Texture
Type
Chelating Agent

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

May support a more uniform-looking complexion when used within multi-ingredient complexes, especially around the eye area, though standalone skin benefits are not well established in published studies.

Uses In Skincare & Cosmetics

Common in eye creams and targeted spot serums formulated for tone concerns. It can also be found in lightweight gel treatments and sheet masks as part of brightening blends.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

May cause stinging or sensitization, especially on thin periorbital skin; patch testing is advisable. No widely recognized topical regulatory restrictions, but avoid using on compromised skin.

Is N-Hydroxysuccinimide a Good Ingredient?

Clinical support for direct skin benefits is limited, and most claims apply only within multi-ingredient complexes, which is why it rates Fair. The potential for irritation, particularly around the eye area, also warrants caution.

Products with N-Hydroxysuccinimide

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