D&C Red No. 34 (Ci 15880)
What is D&C Red No. 34 (Ci 15880)?
D&C Red No. 34, also known as CI 15880, is a synthetic azo dye derived from coal tar processes, featuring a naphthalene sulfonate structure with a diazo linkage that enables its intense red pigmentation. In cosmetics, it belongs to the color additives category, primarily applied in lip and eye area products. It functions by dissolving or dispersing in formulations to impart a stable, uniform red hue, resisting fading from light or pH changes, which helps maintain product appearance over time and across production batches. Regulatory bodies like the FDA require batch certification for purity, ensuring low heavy metal contaminants. Typically used at low concentrations, it adheres to substrates like skin or nails for lasting color without altering texture.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Delivers consistent, vibrant red coloring for appealing visual effects.
Supports uniform shade across product batches for reliable appearance.
Enhances aesthetic appeal in color cosmetics like lip products.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Users of lipsticks and nail polishes seeking bold red tones. | Those with known allergies to azo dyes. |
| Individuals preferring long-lasting color in makeup. | Individuals with sensitive skin prone to colorant reactions. |
| People with normal skin tolerance for certified color additives. | People experiencing contact dermatitis from similar pigments. |
Safety Notes
- Approved by FDA for specific cosmetic uses with batch certification.
- Rated high concern by EWG due to potential persistence and bioaccumulation.
Frequently Asked Questions about D&C Red No. 34 (Ci 15880)
What is D&C Red No. 34 used for?
It serves as a colorant in cosmetics to provide red pigmentation, mainly in lip and external products.
Is it safe for skin?
FDA certifies it for approved uses, but check for personal allergies.
Does it clog pores?
No, it has a comedogenic rating of zero.