Ingredient review
CI 18050
INCI: CI 18050
A widely used synthetic red dye that adds color to cosmetics but has raised some safety concerns in high oral doses.
In plain English
CI 18050 is a man-made red dye that gives a pink or red color to makeup and bath products. It's also known as Erythrosine or FD&C Red No. 3. While it's generally considered safe for topical use, some studies have raised concerns about its safety when ingested in large amounts, which is why it's banned in some countries for use in food but still allowed in cosmetics.
Review score
Safety, usefulness, and evidence
Useful in the right context, but not low-maintenance
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
Quick decision guide
Read the cautions before using
CI 18050 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging CI 18050.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
CI 18050 is a synthetic organic dye from the xanthene family. It is produced from petroleum and is used to impart a bright red or pink hue to cosmetics and personal care items.
How it works
It works by absorbing and reflecting specific wavelengths of light, giving the product a visible red color. It does not have any active skincare function; its sole purpose is aesthetic.
Pros
Vibrant color
Provides a bright, consistent red or pink shade that is stable in many cosmetic formulations.
Widely available
Commonly used and easy to find in a vast range of products, from lipsticks to bath bombs.
Cons and cautions
Synthetic origin
Derived from petroleum, which may be a concern for those seeking natural or eco-friendly products.
Potential allergen
Can cause skin irritation or allergic reactions in some individuals, especially those with sensitive skin.
Best for
- Anyone looking for a bright red or pink color in their cosmetics
- People who are not sensitive to synthetic dyes
Use caution if
- Individuals with known allergies or sensitivities to synthetic dyes
- Those seeking only natural or plant-based colorants
Usage tips
Safety summary
Generally recognized as safe for topical cosmetic use at typical concentrations. However, individuals with sensitive skin or allergies should exercise caution. Oral ingestion concerns are not relevant for external use.
Research notes
Studies have focused on oral toxicity and potential carcinogenicity in animal models at very high doses, but topical application in cosmetics is not linked to significant health risks in humans.
Common label clues
- Typical concentration
- Typically less than 1% in rinse-off products; varies by product type
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU, but with restrictions on concentration in some product types. Not approved for use in food in several regions.
- Common uses
- Lipsticks, Blushes, Nail polishes, Soaps, Bath products
- Environmental note
- As a synthetic dye, it may not be biodegradable and can contribute to water pollution if not properly filtered during manufacturing.
Good to know
- CI 18050 is banned for use in food in some countries (e.g., the US for certain products) but is still permitted in cosmetics.
- The 'CI' stands for Colour Index, a standard naming system for dyes and pigments.
Common questions
What is CI 18050 in beauty products?
CI 18050 is a man-made red dye that gives a pink or red color to makeup and bath products. It's also known as Erythrosine or FD&C Red No. 3. While it's generally considered safe for topical use, some studies have raised concerns about its safety when ingested in large amounts, which is why it's banned in some countries for use in food but still allowed in cosmetics.
What does CI 18050 do in a beauty product?
It works by absorbing and reflecting specific wavelengths of light, giving the product a visible red color. It does not have any active skincare function; its sole purpose is aesthetic.
Is CI 18050 safe for most people?
Generally recognized as safe for topical cosmetic use at typical concentrations. However, individuals with sensitive skin or allergies should exercise caution. Oral ingestion concerns are not relevant for external use.
Who should be careful with CI 18050?
Individuals with known allergies or sensitivities to synthetic dyes Those seeking only natural or plant-based colorants
Research sources
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.