Acid Blue 9 is a synthetic blue dye used to color various products, including cosmetics and food. It is also known as FD&C Blue No. 1.

Is Acid Blue 9 safe for skin?

Acid Blue 9 is generally considered safe for topical use in cosmetics within regulatory limits. However, some individuals with sensitive skin may experience irritation or allergic reactions.

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Acid Blue 9

Acid Blue 9 is a synthetic organic dye that provides a blue color. It is commonly used in cosmetics, personal care products, and foods to achieve a desired aesthetic. This ingredient is water-soluble and offers a vibrant blue hue.

ColorantVegan

BenefitNone 0 / 4

RiskModerate 1.5 / 4

Sensitization i1.5 / 4

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

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.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

May cause irritation in sensitive individuals
Potential for allergic reactions

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Frequently asked questions

What is Acid Blue 9?: Acid Blue 9 is a synthetic blue dye used to color various products, including cosmetics and food. It is also known as FD&C Blue No. 1.
Is Acid Blue 9 safe for skin?: Acid Blue 9 is generally considered safe for topical use in cosmetics within regulatory limits. However, some individuals with sensitive skin may experience irritation or allergic reactions.