Copper Sulfate

Copper sulfate is an inorganic salt of copper, often appearing as blue crystals. In cosmetics, it's primarily used as a colorant or as a mild antiseptic and astringent. It can also function as a chelating agent, binding to metal ions to improve product stability.

BenefitMinimal 0.8 / 4

Acne i0.8 / 4

Whether it can help acne-prone skin — reducing clogged pores, excess oil, acne-causing bacteria, inflammation, or breakouts.

Oil control i0.7 / 4

Whether it can reduce excess sebum, shine, or greasiness — absorbents, sebum-regulating ingredients, and some acne actives.

RiskModerate 1.5 / 4

Irritation i1.5 / 4

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

Sensitization i1 / 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

• mild antiseptic properties
• astringent effects

Things to watch

• skin irritation at high concentrations
• potential for sensitization

Products with Copper Sulfate

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Frequently asked questions

What is copper sulfate used for in skincare?

In skincare, copper sulfate is sometimes included for its mild antiseptic and astringent properties, which can be beneficial for oily or acne-prone skin. It can also act as a chelating agent to stabilize formulations.

Is copper sulfate safe for sensitive skin?

Copper sulfate can be irritating to sensitive skin, especially at higher concentrations. Patch testing is recommended, and individuals with sensitive skin should use products containing it with caution.