Ingredient review
CI 18965
INCI: CI 18965
CI 18965 is a safe, widely used synthetic yellow pigment, but offers no skincare benefits beyond color.
In plain English
CI 18965 is a man-made yellow pigment that gives color to makeup and some skincare products. It's like a tiny, colored particle that sits on the surface of your skin or nails to create a yellow shade. It doesn't treat or change your skin—it's purely for appearance.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
CI 18965 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 18965.
- 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 18965 is a synthetic organic pigment, specifically a yellow azo dye that is often used as a lake (bound to a metal salt) to make it insoluble in water and oil. It is approved for cosmetic use in many regions, including the EU and US.
How it works
In a cosmetic product, CI 18965 particles are dispersed throughout the formula. When applied, they reflect and absorb light in a way that makes the product appear yellow. The pigment does not penetrate the skin; it stays on the surface and is removed with cleansing.
Pros
Stable and long-lasting color
CI 18965 resists fading from sunlight and heat, so your makeup stays vibrant throughout the day.
Low irritation potential
For most people, this pigment is non-irritating and safe for use on skin, eyes, and lips.
Cons and cautions
No functional skincare benefit
This ingredient only adds color—it does not moisturize, protect, or improve skin health.
Rare allergy risk
A small number of people may be sensitive to azo dyes, experiencing redness or itching.
Best for
- Anyone who wants a yellow shade in their makeup
- People with normal, non-sensitive skin
Use caution if
- Individuals with known allergies to azo dyes or specific colorants
Usage tips
Safety summary
CI 18965 is considered safe for cosmetic use by major regulatory bodies. Rare allergic reactions can occur, but it is generally non-irritating and non-comedogenic.
Research notes
Studies confirm low acute toxicity and skin irritation potential. Long-term safety data is based on its use as a food and cosmetic colorant. No significant health risks have been identified at typical exposure levels.
Common label clues
- Typical concentration
- Typically used at very low concentrations, often less than 1%
- Regulatory status
- Approved for use in cosmetics in the EU, US (FDA), and many other countries, subject to concentration limits and purity standards.
- Common uses
- Eyeshadows, Lipsticks, Blushes, Nail polishes
- Environmental note
- As a synthetic pigment, its production involves chemical synthesis, which may have environmental impacts. It is not biodegradable.
Good to know
- CI 18965 is also known as Acid Yellow 23 Aluminum Lake
- It is often used in combination with other pigments to create custom shades
- The 'CI' stands for Colour Index, an international numbering system for colorants
Common questions
What is CI 18965 in beauty products?
CI 18965 is a man-made yellow pigment that gives color to makeup and some skincare products. It's like a tiny, colored particle that sits on the surface of your skin or nails to create a yellow shade. It doesn't treat or change your skin—it's purely for appearance.
What does CI 18965 do in a beauty product?
In a cosmetic product, CI 18965 particles are dispersed throughout the formula. When applied, they reflect and absorb light in a way that makes the product appear yellow. The pigment does not penetrate the skin; it stays on the surface and is removed with cleansing.
Is CI 18965 safe for most people?
CI 18965 is considered safe for cosmetic use by major regulatory bodies. Rare allergic reactions can occur, but it is generally non-irritating and non-comedogenic.
Who should be careful with CI 18965?
Individuals with known allergies to azo dyes or specific 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.