Ingredient review
HC Yellow No. 14
INCI: HC Yellow No. 14
HC Yellow No. 14 is a synthetic yellow dye for hair color, generally considered safe in regulated concentrations but may cause irritation in sensitive individuals.
In plain English
HC Yellow No. 14 is a man-made colorant used in hair dyes to create yellow shades. It works by depositing color onto the hair shaft without penetrating deeply, so the color fades gradually with washing. While it is approved for use in many countries, some people may experience scalp irritation or allergic reactions, especially with repeated use. It is not used in skincare or leave-on products, only in rinse-off hair color.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
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
Useful, but context matters
HC Yellow No. 14 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 HC Yellow No. 14.
- 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
HC Yellow No. 14 is a synthetic nitro dye, specifically a hydroxyethyl-2-nitro-p-toluidine compound, designed to provide yellow color in hair dye products. It belongs to the HC (Hair Color) dye family, which are commonly used in semi-permanent and permanent hair colors.
How it works
In a hair dye product, HC Yellow No. 14 adheres to the outer layer of the hair (the cuticle) and deposits color. Because it does not require an oxidizing agent like hydrogen peroxide, it is often used in semi-permanent formulas that coat the hair surface and wash out over several shampoos. In permanent dyes, it may be combined with other ingredients to achieve a wider range of shades.
Pros
Effective yellow colorant
HC Yellow No. 14 delivers consistent, vibrant yellow tones that resist fading better than some natural alternatives, making it a reliable choice for hair color formulations.
Gentler than permanent dyes
In semi-permanent formulas, this dye coats the hair without harsh chemicals like ammonia or peroxide, reducing damage to the hair shaft compared to permanent color.
Cons and cautions
Potential for irritation
Some users experience scalp redness, itching, or burning, especially with repeated use. A patch test is recommended before full application to check for sensitivity.
Limited to hair use
HC Yellow No. 14 is not approved for use in skincare or leave-on products, so it cannot be used for multi-purpose coloring needs.
Best for
- People looking for semi-permanent yellow hair color
- Those who want to refresh or enhance yellow tones in dyed hair
Use caution if
- Individuals with known allergies to hair dyes or p-phenylenediamine (PPD)
- People with scalp conditions, cuts, or sensitive skin
Usage tips
Safety summary
HC Yellow No. 14 is considered safe for use in hair dyes when formulated within regulated concentration limits. However, it can cause allergic reactions or irritation in some individuals, so patch testing is essential. It should not be used on broken skin or near the eyes.
Research notes
Studies on HC Yellow No. 14 indicate low acute toxicity and no significant evidence of carcinogenicity or mutagenicity at typical use levels. The Cosmetic Ingredient Review (CIR) panel has evaluated similar HC dyes and found them safe for rinse-off hair products when used as directed.
Common label clues
- Typical concentration
- Typically 0.1% to 2% in hair dye formulations
- Regulatory status
- Approved for use in hair dye products in the EU, USA, and many other countries, with concentration limits typically up to 2% in rinse-off formulations. Not permitted in leave-on products or for use near the eyes.
- Common uses
- Hair dyes, Hair tints, Semi-permanent hair color
- Environmental note
- As a synthetic dye, HC Yellow No. 14 may contribute to chemical pollution in wastewater. Proper disposal of hair dye products is recommended to minimize environmental impact.
Good to know
- HC Yellow No. 14 is listed as a permitted hair dye ingredient in the EU Cosmetics Regulation and by the U.S. FDA for use in hair dyes.
- It is not approved for use in products intended to color eyelashes or eyebrows due to risk of eye injury.
Common questions
What is HC Yellow No. 14 in beauty products?
HC Yellow No. 14 is a man-made colorant used in hair dyes to create yellow shades. It works by depositing color onto the hair shaft without penetrating deeply, so the color fades gradually with washing. While it is approved for use in many countries, some people may experience scalp irritation or allergic reactions, especially with repeated use. It is not used in skincare or leave-on products, only in rinse-off hair color.
What does HC Yellow No. 14 do in a beauty product?
In a hair dye product, HC Yellow No. 14 adheres to the outer layer of the hair (the cuticle) and deposits color. Because it does not require an oxidizing agent like hydrogen peroxide, it is often used in semi-permanent formulas that coat the hair surface and wash out over several shampoos. In permanent dyes, it may be combined with other ingredients to achieve a wider range of shades.
Is HC Yellow No. 14 safe for most people?
HC Yellow No. 14 is considered safe for use in hair dyes when formulated within regulated concentration limits. However, it can cause allergic reactions or irritation in some individuals, so patch testing is essential. It should not be used on broken skin or near the eyes.
Who should be careful with HC Yellow No. 14?
Individuals with known allergies to hair dyes or p-phenylenediamine (PPD) People with scalp conditions, cuts, or sensitive 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.