FD&C Red No. 40 (Ci 16035)
What is FD&C Red No. 40 (Ci 16035)?
FD&C Red No. 40, or CI 16035, is a synthetic azo compound, specifically the disodium salt of 6-hydroxy-5-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2-naphthalenesulfonate, produced from petrochemical sources. It exists as a bright red powder soluble in water and some solvents. Primarily employed as a colorant in rinse-off and leave-on cosmetics such as lipsticks, blushes, shampoos, and soaps, it imparts a vivid red hue by selectively absorbing light wavelengths. This enables manufacturers to achieve precise, uniform coloration across production batches, maintaining product aesthetics despite variations in other ingredients. Its stability against light, heat, and pH makes it reliable for diverse formulations, outperforming some natural alternatives in consistency.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Delivers intense, stable red color for eye-catching product appearance.
Supports uniform shading across batches for reliable visuals.
Non-comedogenic, avoiding pore blockage in colored cosmetics.
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 desiring bold, consistent makeup colors. | Those allergic to azo dyes or synthetic colors. |
| Formulators prioritizing color stability in products. | People with highly sensitive skin prone to reactions. |
| Individuals with acne-prone skin seeking non-clogging colorants. | Preferers of fully natural, dye-free formulations. |
Safety Notes
- Approved for cosmetic use by FDA and deemed safe by CIR experts.
- Low comedogenic potential, rated 0 for pore-clogging risk.
Frequently Asked Questions about FD&C Red No. 40 (Ci 16035)
Is FD&C Red No. 40 safe in cosmetics?
Yes, certified by FDA for cosmetics and safe as used per CIR assessments.
Does it clog pores?
No, it has a comedogenic rating of 0, making it unlikely to contribute to breakouts.
Can it irritate skin?
Irritation is uncommon; most experience no issues, though patch testing advised for sensitivities.