Ingredient review
CI 73915
INCI: CI 73915
CI 73915 is a safe, widely used red pigment that gives makeup its color without known skin irritation or clogging.
In plain English
CI 73915 is a red pigment, essentially a synthetic iron oxide, that manufacturers add to makeup to create shades of red, pink, or coral. It's the same type of colorant found in many blushes, lipsticks, and foundations. Because it's an inorganic mineral pigment, it sits on the skin's surface and doesn't penetrate, making it very unlikely to cause irritation or breakouts.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is relatively strong for its common cosmetic role.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- strong
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
CI 73915 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 73915.
- 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
strongThere is a stronger practical or research basis for the ingredient role described here.
What it is
CI 73915 is a synthetic red iron oxide pigment (also known as Pigment Red 101) approved for use in cosmetics. It is an inorganic compound that provides opaque, stable red color.
How it works
As a pigment, CI 73915 works by reflecting and absorbing specific wavelengths of light to produce a red hue. It is dispersed in the product's base (like a cream or powder) and coats the skin's surface when applied, creating the desired color without chemically reacting with the skin.
Pros
Very low irritation risk
As an inorganic pigment, CI 73915 rarely causes allergic reactions or stinging, making it suitable for sensitive skin.
Color stability
It resists fading from sunlight and heat, so your makeup stays true to shade throughout the day.
Cons and cautions
Synthetic origin
It is not naturally derived, which may be a drawback for consumers seeking 100% natural or organic products.
Potential staining
If not properly formulated or set, the pigment can transfer to clothing or fabrics, leaving red marks.
Best for
- Anyone looking for safe, non-irritating color in makeup
- People with sensitive skin who want to avoid organic dyes
Use caution if
- Those who prefer only natural or plant-derived colorants (CI 73915 is synthetic)
Usage tips
Safety summary
CI 73915 is well-studied and considered safe for use in cosmetics. It is non-toxic, non-irritating, and non-sensitizing when used as intended. No significant safety concerns have been raised by regulatory bodies.
Research notes
Research supports the safety of synthetic iron oxides in cosmetics. Studies show no evidence of skin penetration, irritation, or systemic toxicity at typical use levels. The Cosmetic Ingredient Review (CIR) panel has deemed iron oxides safe as used.
Common label clues
- Typical concentration
- 0.1% to 5% depending on desired shade intensity
- Regulatory status
- Approved as a color additive for cosmetics in the US (FDA) and EU (EC) with no restrictions beyond good manufacturing practices.
- Common uses
- Foundations, Blushes, Lipsticks, Eyeshadows, Tinted moisturizers
- Environmental note
- Synthetic iron oxides are produced in controlled processes and are generally considered low-impact, but mining of raw materials can have environmental effects.
Good to know
- CI 73915 is often listed alongside other iron oxides (CI 77491, CI 77492, CI 77499) in foundation ingredient lists.
- It is approved by the FDA for use in cosmetics and is considered safe at typical concentrations.
Common questions
What is CI 73915 in beauty products?
CI 73915 is a red pigment, essentially a synthetic iron oxide, that manufacturers add to makeup to create shades of red, pink, or coral. It's the same type of colorant found in many blushes, lipsticks, and foundations. Because it's an inorganic mineral pigment, it sits on the skin's surface and doesn't penetrate, making it very unlikely to cause irritation or breakouts.
What does CI 73915 do in a beauty product?
As a pigment, CI 73915 works by reflecting and absorbing specific wavelengths of light to produce a red hue. It is dispersed in the product's base (like a cream or powder) and coats the skin's surface when applied, creating the desired color without chemically reacting with the skin.
Is CI 73915 safe for most people?
CI 73915 is well-studied and considered safe for use in cosmetics. It is non-toxic, non-irritating, and non-sensitizing when used as intended. No significant safety concerns have been raised by regulatory bodies.
Who should be careful with CI 73915?
Those who prefer only natural or plant-derived colorants (CI 73915 is synthetic)
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.