D&C Red No. 17 (Ci 26100)
What is D&C Red No. 17 (Ci 26100)?
D&C Red No. 17, also identified as CI 26100, is a synthetic organic pigment from the monoazo dye family, chemically structured as 1-[(2,4-dimethylphenyl)azo]-2-naphthalenol. Produced through diazotization and coupling reactions, this oil-soluble colorant is approved by regulators for cosmetic applications, mainly in products contacting mucous membranes or external skin like lips and nails. It works by selectively absorbing blue-green light wavelengths, reflecting a brilliant reddish hue that integrates into formulations without dissolving in water. Formulators incorporate it into lipsticks, nail polishes, and similar items to provide uniform pigmentation that resists fading from light or friction, maintaining product appearance over time and across manufacturing batches.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Offers intense, consistent red coloring for visual appeal.
Provides color stability in lip and nail products.
Helps achieve uniform shades batch-to-batch.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| People wanting bold red tones in makeup. | Those allergic to azo dyes. |
| Users of lipsticks and nail enamels. | People with dye sensitivity history. |
| Individuals seeking non-comedogenic colorants. | Individuals prone to contact dermatitis. |
Safety Notes
- Certified by regulators for purity in approved uses.
- Subject to batch testing to limit impurities.
Frequently Asked Questions about D&C Red No. 17 (Ci 26100)
What is D&C Red No. 17 used for?
Primarily as a colorant in lipsticks, nail polishes, and external cosmetics for red pigmentation.
Is it safe for cosmetic use?
Approved by regulators when certified, with batch purity verification.
Does it cause irritation?
Generally low irritation potential in approved applications.