Ingredient review
HC Yellow No. 13
INCI: HC Yellow No. 13
HC Yellow No. 13 is a synthetic colorant used in hair dyes, generally considered safe in rinse-off products but may cause irritation for sensitive scalps.
In plain English
HC Yellow No. 13 is a man-made dye that adds yellow color to hair products. It's commonly found in hair dyes and temporary color rinses. When used as directed in rinse-off products, it's considered low-risk, but people with sensitive skin or scalp conditions may experience irritation.
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. 13 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. 13.
- 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. 13 is a synthetic organic compound belonging to the HC dye family, specifically designed for coloring hair. It is a yellow powder that is soluble in water and alcohol, allowing it to penetrate the hair shaft for temporary or semi-permanent color.
How it works
In hair dye formulations, HC Yellow No. 13 works by depositing color onto the hair shaft. It binds to the outer cuticle layer, providing a yellow tint that can be used alone or mixed with other HC dyes to create custom shades. Because it is not a permanent dye, it gradually washes out over several shampoos.
Pros
Vibrant color payoff
Provides bright, true yellow tones that can be mixed for custom shades, ideal for creative hair color.
Gradual fading
Semi-permanent nature means color fades over several washes, reducing harsh regrowth lines.
Cons and cautions
Potential scalp irritation
Can cause redness, itching, or burning for those with sensitive skin or scalp conditions like eczema.
Limited safety data
Long-term effects of repeated use are not fully studied, especially for frequent application.
Best for
- People looking for temporary or semi-permanent yellow hair color
- Those who want to experiment with color without long-term commitment
Use caution if
- Individuals with known allergies to hair dyes or sensitive scalps
- Pregnant or breastfeeding women (due to limited safety data)
Usage tips
Safety summary
HC Yellow No. 13 is generally safe for use in rinse-off hair dyes at typical concentrations. However, it can cause irritation in sensitive individuals, and long-term safety data for frequent use is limited. Patch testing is recommended.
Research notes
Studies indicate low acute toxicity and no significant genotoxicity at typical use levels. However, there is limited research on chronic exposure or cumulative effects from repeated use.
Common label clues
- Typical concentration
- Typically 0.1% to 2% in hair dye formulations
- Regulatory status
- Approved for use in hair dyes in the EU and US under cosmetic regulations, with concentration limits and labeling requirements for rinse-off products.
- Common uses
- Hair dyes, Temporary hair color, Semi-permanent hair color
- Environmental note
- Synthetic dyes may persist in wastewater; proper disposal of hair dye products is recommended to minimize environmental impact.
Good to know
- HC Yellow No. 13 is often used in combination with other HC dyes to achieve a range of yellow, orange, and brown shades.
- It is not approved for use in products intended to color eyelashes or eyebrows.
Common questions
What is HC Yellow No. 13 in beauty products?
HC Yellow No. 13 is a man-made dye that adds yellow color to hair products. It's commonly found in hair dyes and temporary color rinses. When used as directed in rinse-off products, it's considered low-risk, but people with sensitive skin or scalp conditions may experience irritation.
What does HC Yellow No. 13 do in a beauty product?
In hair dye formulations, HC Yellow No. 13 works by depositing color onto the hair shaft. It binds to the outer cuticle layer, providing a yellow tint that can be used alone or mixed with other HC dyes to create custom shades. Because it is not a permanent dye, it gradually washes out over several shampoos.
Is HC Yellow No. 13 safe for most people?
HC Yellow No. 13 is generally safe for use in rinse-off hair dyes at typical concentrations. However, it can cause irritation in sensitive individuals, and long-term safety data for frequent use is limited. Patch testing is recommended.
Who should be careful with HC Yellow No. 13?
Individuals with known allergies to hair dyes or sensitive scalps Pregnant or breastfeeding women (due to limited safety data)
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.