CI 42090

CI 42090 is a synthetic blue dye (Blue 1) recognized in cosmetic color listings and readily water-soluble. It's used to deliver bright blue or teal shades in gels, bath products, and makeup while keeping clarity and shade stability.
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Ingredient Snapshot

Overview
A synthetic blue dye used to color gels and makeup bright blue.
Category
Color
Type
Colorant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Creates clear, cool blue coloration and blends well to form turquoise or green effects. Maintains color clarity for striking visual impact.

Uses In Skincare & Cosmetics

Found in cleansers, micellar waters, shampoos, and bath bombs to achieve vivid blue tones across formats.

Comedogenic Rating

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

Safety

Considered safe within regulatory limits; rare allergic responses have been reported, and it may stain porous surfaces or very light hair. Regional concentration and use restrictions can apply.

Is CI 42090 a Good Ingredient?

It yields strong, clean blue shades and blends predictably to create teals/greens, with good stability in aqueous systems; its benefits are visual rather than skincare-related. That mix of usefulness and tolerability lands it a Good rating rather than Great.

Products with CI 42090

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