Ingredient review

Acid Red 18 Aluminum Lake

INCI: Acid Red 18 Aluminum Lake

A widely used synthetic pigment that adds vibrant red shades to makeup, generally considered safe at low concentrations but best avoided on broken skin.

beautyskincarecolorant

In plain English

This is a man-made red pigment used to give color to makeup like lipstick, blush, and eyeshadow. It is made by taking a red dye and attaching it to aluminum, which makes the color stay put and not bleed into other ingredients. While it is approved for use in cosmetics, some people prefer to avoid it due to concerns about aluminum or synthetic dyes in general.

Quick decision guide

Useful, but context matters

Acid Red 18 Aluminum Lake is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Acid Red 18 Aluminum Lake.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

Acid Red 18 Aluminum Lake is a synthetic colorant produced by precipitating the water-soluble dye Acid Red 18 (also known as Ponceau 4R) onto an aluminum hydroxide substrate. This process creates an insoluble pigment that provides stable, vibrant red hues in cosmetic formulations.

How it works

In a cosmetic product, the aluminum lake particles are dispersed throughout the formula. Because they are insoluble, they do not dissolve or migrate, which means the color stays where it is applied and does not bleed into other areas. The pigment reflects and absorbs specific wavelengths of light, creating the red color perceived by the eye.

Pros

Vibrant and stable color

Provides intense red shades that resist fading and bleeding, making it ideal for long-wear lipsticks and blushes.

Widely approved and tested

Approved by major regulatory bodies like the FDA and EU for use in cosmetics, with a long history of safe use at typical concentrations.

Cons and cautions

Synthetic and not natural

For readers who prefer natural or clean beauty, this ingredient is man-made and may not align with their preferences.

Potential trace aluminum concerns

Although levels are low and regulated, some people choose to avoid aluminum-based ingredients due to personal health concerns.

Best for

  • Anyone looking for vibrant, long-lasting red or pink makeup shades
  • People who do not have sensitivities to synthetic dyes or aluminum compounds

Use caution if

  • Individuals with known allergies or sensitivities to synthetic colorants or aluminum
  • Those who strictly avoid synthetic ingredients in their beauty routine

Usage tips

Check the ingredient list if you have a known sensitivity to synthetic dyes or aluminum compounds.
Patch test a new product containing this pigment on a small area of skin before full application, especially if you have sensitive skin.

Safety summary

Acid Red 18 Aluminum Lake is considered safe for use in cosmetics at regulated concentrations. The main concerns are rare allergic reactions and the presence of aluminum, but regulatory bodies have set limits to ensure consumer safety. It is not a known irritant or comedogen.

Research notes

Studies on this pigment focus on its stability and safety as a color additive. The Cosmetic Ingredient Review (CIR) panel has evaluated similar aluminum lake pigments and found them safe for cosmetic use. No significant human health risks have been identified at typical exposure levels.

Common label clues

Typical concentration
Typically 0.1% to 5% depending on desired shade intensity
Regulatory status
Approved for use in cosmetics by the U.S. FDA (as a color additive) and the European Commission (listed in Annex IV of the Cosmetics Regulation). Usage is restricted to certain product types and maximum concentrations.
Common uses
Lipsticks, Blushes, Eyeshadows, Nail polishes, Foundations
Environmental note
As a synthetic pigment, its production involves chemical synthesis and may have environmental impacts. It is not biodegradable and can accumulate in water systems if not properly filtered during manufacturing.

Good to know

  • The 'Lake' in the name refers to the process of making the dye insoluble by binding it to a metal salt, usually aluminum.
  • This pigment is also used in some food products as a colorant, though cosmetic use is more common.

Common questions

What is Acid Red 18 Aluminum Lake in beauty products?

This is a man-made red pigment used to give color to makeup like lipstick, blush, and eyeshadow. It is made by taking a red dye and attaching it to aluminum, which makes the color stay put and not bleed into other ingredients. While it is approved for use in cosmetics, some people prefer to avoid it due to concerns about aluminum or synthetic dyes in general.

What does Acid Red 18 Aluminum Lake do in a beauty product?

In a cosmetic product, the aluminum lake particles are dispersed throughout the formula. Because they are insoluble, they do not dissolve or migrate, which means the color stays where it is applied and does not bleed into other areas. The pigment reflects and absorbs specific wavelengths of light, creating the red color perceived by the eye.

Is Acid Red 18 Aluminum Lake safe for most people?

Acid Red 18 Aluminum Lake is considered safe for use in cosmetics at regulated concentrations. The main concerns are rare allergic reactions and the presence of aluminum, but regulatory bodies have set limits to ensure consumer safety. It is not a known irritant or comedogen.

Who should be careful with Acid Red 18 Aluminum Lake?

Individuals with known allergies or sensitivities to synthetic colorants or aluminum Those who strictly avoid synthetic ingredients in their beauty routine

Research sources

FDA Color Additive Status ListOpenCosmetic Ingredient Review (CIR) Safety AssessmentOpenEuropean Commission CosIng DatabaseOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.