Ingredient review
Acid Yellow 36
INCI: CI 14270
CI 14270 is a synthetic yellow dye that adds color to products but may cause irritation in sensitive individuals.
In plain English
CI 14270 is a man-made yellow colorant used in cosmetics to give products a yellow hue. It is also known as Acid Yellow 36. While it makes products look appealing, it has been associated with skin irritation and allergic reactions in some people, especially those with sensitive skin. It is not a skincare active ingredient and does not provide any skin benefits beyond color.
Review score
Safety, usefulness, and evidence
Higher-caution ingredient
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Read the cautions before using
Acid Yellow 36 can be useful, but watch for some irritation potential.
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 Acid Yellow 36.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 14270 is a synthetic azo dye that produces a yellow color. It is listed under the Color Index as a cosmetic colorant.
How it works
It works by absorbing and reflecting specific wavelengths of light, creating a yellow appearance in the product. It does not interact with the skin biologically.
Pros
Effective colorant
Provides a consistent and bright yellow color that is stable in many formulations.
Cost-effective
Synthetic dyes like CI 14270 are generally inexpensive to produce, keeping product costs lower.
Cons and cautions
Potential irritant
Can cause skin irritation, redness, or itching, especially in those with sensitive skin or eczema.
Allergen risk
Azo dyes, including CI 14270, are known allergens and may trigger contact dermatitis in susceptible individuals.
Best for
- People who are not sensitive to synthetic dyes
- Those using products where color is important for aesthetic appeal
Use caution if
- Individuals with known sensitivities or allergies to azo dyes
- People with very sensitive or reactive skin
Usage tips
Safety summary
CI 14270 is generally considered safe for use in cosmetics at low concentrations, but it carries a moderate risk of skin irritation and allergic reactions. It is best avoided by those with sensitive skin or known dye allergies.
Research notes
Research indicates that azo dyes like CI 14270 can cause allergic contact dermatitis in some individuals. Regulatory bodies have set limits on concentrations and usage areas to minimize risk.
Common label clues
- Typical concentration
- Typically used at very low concentrations (less than 1%)
- Regulatory status
- Approved for use in cosmetics in many regions, but restrictions may apply for use near eyes or on mucous membranes. Always check local regulations.
- Common uses
- Hair dyes, Soaps, Bath products
- Environmental note
- Synthetic azo dyes can be persistent in the environment and may require careful disposal to avoid water pollution.
Good to know
- CI 14270 is banned or restricted in some countries for use in products applied to mucous membranes or around the eyes.
- It is not a skincare active ingredient and does not provide any moisturizing, anti-aging, or protective benefits.
Common questions
What is Acid Yellow 36 in beauty products?
CI 14270 is a man-made yellow colorant used in cosmetics to give products a yellow hue. It is also known as Acid Yellow 36. While it makes products look appealing, it has been associated with skin irritation and allergic reactions in some people, especially those with sensitive skin. It is not a skincare active ingredient and does not provide any skin benefits beyond color.
What does Acid Yellow 36 do in a beauty product?
It works by absorbing and reflecting specific wavelengths of light, creating a yellow appearance in the product. It does not interact with the skin biologically.
Is Acid Yellow 36 safe for most people?
CI 14270 is generally considered safe for use in cosmetics at low concentrations, but it carries a moderate risk of skin irritation and allergic reactions. It is best avoided by those with sensitive skin or known dye allergies.
Who should be careful with Acid Yellow 36?
Individuals with known sensitivities or allergies to azo dyes People with very sensitive or reactive skin
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.