Ingredient review
CI 12700
INCI: CI 12700
CI 12700 is a synthetic yellow dye that adds color to cosmetics but offers no skincare benefits.
In plain English
CI 12700 is a man-made yellow pigment used to give color to beauty products like hair dye, soap, and nail polish. It does not treat or improve skin—it's purely for appearance. The ingredient has been reviewed by safety panels and is generally considered safe in the tiny amounts used in cosmetics, but some people with very sensitive skin may prefer to avoid synthetic colorants.
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 12700 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 12700.
- 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 12700 is a synthetic azo dye that produces a yellow hue. It belongs to a class of colorants approved for use in cosmetics in many regions, including the EU and the US, under specific concentration limits.
How it works
In a cosmetic product, CI 12700 simply absorbs and reflects light in the yellow wavelength range, giving the product a yellow color. It does not interact with skin cells or provide any functional benefit beyond aesthetics.
Pros
Vibrant color
Provides a consistent, bright yellow shade that doesn't fade easily in typical product formulations.
Regulatory approval
Approved for use in cosmetics by major regulatory bodies like the FDA and EU Commission when used within set limits.
Cons and cautions
No skin benefit
This ingredient adds color only—it does not moisturize, protect, or improve skin health in any way.
Potential irritant
Though rare, some people with very sensitive skin or allergies to synthetic dyes may experience mild irritation or contact dermatitis.
Best for
- Anyone who wants colorful cosmetic products
- People without known sensitivity to synthetic dyes
Use caution if
- Individuals with known allergies or sensitivities to azo dyes
- Those seeking skincare benefits from their colorants
Usage tips
Safety summary
CI 12700 is considered safe for use in cosmetics at regulated concentrations. The Cosmetic Ingredient Review (CIR) panel and EU SCCS have reviewed similar azo dyes and found them acceptable for rinse-off and some leave-on products. However, individuals with known dye allergies should exercise caution.
Research notes
Research on CI 12700 specifically is limited, but the broader class of azo dyes has been studied for skin sensitization. Most studies indicate low irritation potential at cosmetic use levels, though rare allergic reactions are documented.
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 (Annex IV) and by the US FDA for specific product types, subject to concentration limits.
- Common uses
- Hair dyes, Soaps, Bath products, Nail polishes
- Environmental note
- As a synthetic azo dye, CI 12700 may not be biodegradable and could persist in water systems if not properly treated. Eco-conscious consumers may prefer natural colorants.
Good to know
- CI stands for Colour Index, an international numbering system for dyes and pigments.
- CI 12700 is also used in some industrial applications, but cosmetic-grade material is purified for safety.
Common questions
What is CI 12700 in beauty products?
CI 12700 is a man-made yellow pigment used to give color to beauty products like hair dye, soap, and nail polish. It does not treat or improve skin—it's purely for appearance. The ingredient has been reviewed by safety panels and is generally considered safe in the tiny amounts used in cosmetics, but some people with very sensitive skin may prefer to avoid synthetic colorants.
What does CI 12700 do in a beauty product?
In a cosmetic product, CI 12700 simply absorbs and reflects light in the yellow wavelength range, giving the product a yellow color. It does not interact with skin cells or provide any functional benefit beyond aesthetics.
Is CI 12700 safe for most people?
CI 12700 is considered safe for use in cosmetics at regulated concentrations. The Cosmetic Ingredient Review (CIR) panel and EU SCCS have reviewed similar azo dyes and found them acceptable for rinse-off and some leave-on products. However, individuals with known dye allergies should exercise caution.
Who should be careful with CI 12700?
Individuals with known allergies or sensitivities to azo dyes Those seeking skincare benefits from their 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.