Ferric Ammonium Ferrocyanide
What is Ferric Ammonium Ferrocyanide?
Ferric Ammonium Ferrocyanide is a synthetic inorganic compound, a coordination complex of iron and the ferrocyanide ion with ammonium, manifesting as a fine deep blue powder called Prussian blue. In the cosmetics industry, it serves as a color additive mainly in eye makeup products such as eyeshadows, eyeliners, and mascaras. It works by absorbing specific light wavelengths and reflecting blue light, delivering intense pigmentation that withstands light exposure and maintains vibrancy. Its high insolubility in water and oils keeps it on the skin surface, preventing color bleeding or transfer. This stability supports uniform shade across product batches and during application, making it a reliable choice for formulators aiming for consistent visual effects in long-wear formulas.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Imparts rich, enduring blue color to eye cosmetics.
Offers excellent lightfastness to prevent fading.
Ensures color uniformity and stability in formulations.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Makeup enthusiasts desiring bold blue shades. | Those with allergies to iron-based compounds. |
| Users seeking fade-resistant eye products. | People sensitive to synthetic pigments. |
| Individuals tolerant of inorganic colorants. | Users preferring only natural-derived colorants. |
Safety Notes
- Approved for cosmetic use by regulatory authorities.
- Insoluble nature limits skin absorption.
Frequently Asked Questions about Ferric Ammonium Ferrocyanide
What is Ferric Ammonium Ferrocyanide?
A synthetic blue pigment used to color cosmetics, especially eye products.
Is it safe in cosmetics?
Regulatory bodies approve it for use, with low absorption due to insolubility.
What products contain it?
Commonly found in eyeshadows, eyeliners, and mascaras for blue shades.