Ferric ferrocyanide
Prussian blueBerlin blue
Colorant
Ferric ferrocyanide is a type of blue pigment used in some foods and cosmetics. It's made from a combination of iron and cyanide, which might sound scary, but it's generally considered safe in small amounts.
Low Concern
Source: FDA GRAS list
Ferric ferrocyanide is considered safe because it's not easily absorbed into the body and doesn't cause any known health problems at typical usage levels.
No result found for this ingredient.
r/marshallsfinds
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Ross did not disappoint today!!
Interfacial Assembly of Excited-State Engineered Fluorophores on Prussian Blue Particles: A Dual-Targeted Nanoplatform for CO-Augmented Low-Temperature Photothermal Therapy.
Huo J, Yu Y, Zhang Q
2026
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Last updated: May 16, 2026