Ferrous Sulfate

INCI: FERROUS SULFATE

CAS Number
7720-78-7 (anhydrous); 7782-63-0 (heptahydrate)
Function
Cosmetic astringent, skin conditioning
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” FDA GRAS for food (21 CFR ยง184.1315); no cosmetic-specific ban

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

More irritating than ferrous lactate with serious eye irritation potential (H302, H315, H319). Pro-oxidant via Fenton chemistry; stains formulations and packaging; astringent effect may cause dryness at higher concentrations. Must be kept from mucous membranes.

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Concern Level: Moderate

Frequently Asked Questions

Is Ferrous Sulfate safe in cosmetics?

More irritating than ferrous lactate with serious eye irritation potential (H302, H315, H319). Pro-oxidant via Fenton chemistry; stains formulations and packaging; astringent effect may cause dryness at higher concentrations. Must be kept from mucous membranes. The EU classifies Ferrous Sulfate as "permitted". Safety rating: MODERATE.

Is Ferrous Sulfate allowed in the EU?

Ferrous Sulfate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Ferrous Sulfate do in cosmetics?

Ferrous Sulfate functions as: Cosmetic astringent, skin conditioning. It is classified as a cosmetic ingredient in our database. CAS number: 7720-78-7 (anhydrous); 7782-63-0 (heptahydrate).

What is the Margin of Safety for Ferrous Sulfate?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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