Moderate Cosmetic Ingredient GHS Classified

Sodium Hydrosulfite

INCI: SODIUM HYDROSULFITE (SODIUM DITHIONITE)

CAS Number
7775-14-6
Function
Reducing Agent
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status permitted
EU Max Conc. 0.2%
🇺🇸 US Status permitted
US Notes Permitted; related sulfites reviewed by CIR — safe as used; GRAS for food (related sulfites)

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
low
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

GHS Hazard Classification

Globally Harmonized System classification per ECHA C&L inventory and ILO/WHO International Chemical Safety Cards.

Signal Word
WARNING
Pictograms
flam;flame
Hazard Statements
Self-heating in large quantities; may catch fire. May be harmful if swallowed Causes eye irritation Harmful to aquatic life
Short-term Exposure Effects
The substance is irritating to the eyes and respiratory tract.
Routes of Exposure
The substance can be absorbed into the body by ingestion.

Expert Verdict

Strong reducing agent; skin/eye irritant at higher concentrations; self-heating/fire risk in powder form; sulfite sensitivity in asthmatics; bisulfite genotoxicity concerns in vitro (negative in vivo)

⚠️
Concern Level: High

Regulatory Flags

fda_food_additive

Frequently Asked Questions

Is Sodium Hydrosulfite safe in cosmetics?

Strong reducing agent; skin/eye irritant at higher concentrations; self-heating/fire risk in powder form; sulfite sensitivity in asthmatics; bisulfite genotoxicity concerns in vitro (negative in vivo) The EU classifies Sodium Hydrosulfite as "permitted". Safety rating: MODERATE.

Is Sodium Hydrosulfite allowed in the EU?

Sodium Hydrosulfite EU regulatory status: permitted. Maximum allowed concentration: 0.2%. This is based on EU Regulation 1223/2009 and its amendments.

What does Sodium Hydrosulfite do in cosmetics?

Sodium Hydrosulfite functions as: Reducing Agent. It is classified as a cosmetic ingredient in our database. CAS number: 7775-14-6.

What is the Margin of Safety for Sodium Hydrosulfite?

adequate 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.

Is Sodium Hydrosulfite classified as hazardous under GHS?

Sodium Hydrosulfite carries a GHS signal word of "WARNING". Hazard statements: Self-heating in large quantities; may catch fire. May be harmful if swallowed Causes eye irritation Harmful to aquatic life. This classification is based on the ILO/WHO International Chemical Safety Card and ECHA C&L inventory data. Note: GHS classification applies to the pure substance — at cosmetic use concentrations, hazard thresholds may not be met.

Compliance Tools

Check Sodium Hydrosulfite compliance across multiple jurisdictions:

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Ingredient Decoder
Paste a full ingredient list for instant analysis
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82 Allergen Checker
Check for EU declarable fragrance allergens
 🧪
Substance Compliance
Check compliance across 55 jurisdictions
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
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Heavy Metal Limits
Compare limits across jurisdictions

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