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Colorant

FERRIC FERROCYANIDE

CAS 12240-15-2/ 14038-43-8
78

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

Prussian Blue (CI 77510) — an approved blue mineral pigment. The cyanide groups are locked tightly inside the iron lattice and not biologically available; safe at cosmetic levels.

Function

COLORANT

Skin benefits

  • Stable blue mineral pigment
  • Approved cosmetic colorant globally
  • Lightfast and chemically inert
  • Used in eye and lip products

Known concerns

  • Restricted in some markets in eye-area products at higher levels
  • Cyanide bound very strongly — not bioavailable, but optics-of-name concern

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

PC

PubChem

U.S. NIH compound data, GHS hazard codes and toxicity literature.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.