Ingredient review

FD&C Red No. 4

INCI: CI 15980

A widely used synthetic red dye that is generally safe in cosmetics but offers no skincare benefits.

beautyskincarecolorant

In plain English

CI 15980 is a man-made red colorant, also known as FD&C Red No. 4. It's added to cosmetics to give them a pink or red hue, like in lipsticks or blushes. It doesn't treat or improve your skin—it's purely for appearance. Regulatory bodies consider it safe for use in limited amounts, but some people prefer to avoid synthetic dyes due to sensitivity or personal preference.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

FD&C Red No. 4 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 FD&C Red No. 4.
  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

CI 15980 is a synthetic azo dye, produced from petroleum or coal tar sources, that provides a bright red color. It is approved for use in cosmetics and some foods in many countries.

How it works

In a cosmetic product, CI 15980 simply absorbs and reflects light in the red spectrum, giving the product a visible color. It does not interact with the skin's biology or provide any functional benefit beyond aesthetics.

Pros

Vibrant color payoff

Provides a bright, consistent red shade that stays stable in formulas, so your lipstick or blush looks the same every time.

Regulatory approval

Approved by agencies like the FDA for use in cosmetics, meaning it has been reviewed for safety at typical use levels.

Cons and cautions

No skin benefit

This ingredient is purely cosmetic—it adds color but does not hydrate, protect, or improve your skin in any way.

Potential irritant for sensitive skin

Though rare, some people may experience redness or irritation from synthetic dyes, especially on compromised or very sensitive skin.

Best for

  • Anyone using conventional colored cosmetics like lipstick or blush
  • Those who want predictable, long-lasting color

Use caution if

  • Individuals with known sensitivities or allergies to synthetic dyes
  • Those seeking 100% natural or organic beauty products

Usage tips

Check the ingredient list if you have a known sensitivity to synthetic dyes.
Patch test a new colored product on your inner arm before applying to your face.

Safety summary

CI 15980 is considered safe for cosmetic use at typical concentrations by major regulatory bodies. However, a small percentage of people may experience skin irritation. It is not known to be carcinogenic or toxic in the amounts used in cosmetics.

Research notes

Research indicates that CI 15980 has low acute toxicity and is not a significant skin sensitizer for the general population. Most safety data comes from regulatory reviews rather than independent clinical studies.

Common label clues

Typical concentration
Typically used at very low concentrations (less than 1%) to achieve desired shade.
Regulatory status
Approved for use in cosmetics in the US (FDA) and EU (as a listed colorant), subject to concentration limits in some product types.
Common uses
Lip products, Blushes, Bath products, Soaps
Environmental note
As a synthetic dye, it is derived from non-renewable resources and may not be biodegradable. Some consumers choose natural alternatives for environmental reasons.

Good to know

  • CI 15980 is sometimes listed as FD&C Red No. 4 on labels.
  • It is not the same as Red 40 (CI 16035), which is more common in foods.

Common questions

What is FD&C Red No. 4 in beauty products?

CI 15980 is a man-made red colorant, also known as FD&C Red No. 4. It's added to cosmetics to give them a pink or red hue, like in lipsticks or blushes. It doesn't treat or improve your skin—it's purely for appearance. Regulatory bodies consider it safe for use in limited amounts, but some people prefer to avoid synthetic dyes due to sensitivity or personal preference.

What does FD&C Red No. 4 do in a beauty product?

In a cosmetic product, CI 15980 simply absorbs and reflects light in the red spectrum, giving the product a visible color. It does not interact with the skin's biology or provide any functional benefit beyond aesthetics.

Is FD&C Red No. 4 safe for most people?

CI 15980 is considered safe for cosmetic use at typical concentrations by major regulatory bodies. However, a small percentage of people may experience skin irritation. It is not known to be carcinogenic or toxic in the amounts used in cosmetics.

Who should be careful with FD&C Red No. 4?

Individuals with known sensitivities or allergies to synthetic dyes Those seeking 100% natural or organic beauty products

Research sources

FDA Color Additive Status ListOpenCosmetic Ingredient Review (CIR) Safety AssessmentOpenPubChem Compound Summary for CI 15980Open

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.