Formamidine Sulfinic Acid

INCI: FORMAMIDINE SULFINIC ACID

CAS Number
1758-73-2
Function
Reducing agent for hair dye and color removal
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status prohibited
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” not restricted under 21 CFR for cosmetic use

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Strong reducing agent that does not produce free formaldehyde, with GHS classifications including H302, H315, and H319; professional-use context recommended.

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Concern Level: Moderate

Frequently Asked Questions

Is Formamidine Sulfinic Acid safe in cosmetics?

Strong reducing agent that does not produce free formaldehyde, with GHS classifications including H302, H315, and H319; professional-use context recommended. The EU classifies Formamidine Sulfinic Acid as "prohibited". Safety rating: MODERATE.

Is Formamidine Sulfinic Acid allowed in the EU?

Formamidine Sulfinic Acid EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

What does Formamidine Sulfinic Acid do in cosmetics?

Formamidine Sulfinic Acid functions as: Reducing agent for hair dye and color removal. It is classified as a cosmetic ingredient in our database. CAS number: 1758-73-2.

What is the Margin of Safety for Formamidine Sulfinic Acid?

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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