Is Sodium Hydrosulfite safe in cosmetics?
Sodium Hydrosulfite has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
Sodium Hydrosulfite
Also known as: Caswell No. 774, EINECS 231-890-0, EPA Pesticide Chemical Code 078202, Sodium hyposulfite, Hydrosulfite R Conc (+2 more)
INCI: SODIUM HYDROSULFITE (SODIUM DITHIONITE)
Sodium Hydrosulfite (CAS 7775-14-6) is a cosmetic cosmetic ingredient functioning as Reducing Agent. EU Regulation 1223/2009 status: permitted, max 0.2%; GHS signal word WARNING. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety and pharmaceutical data.
View industrial chemical safety profile for CAS 7775-14-6 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Sodium Hydrosulfite is classified GHS Danger (H251, H302, H315, H319, H303, H402, H412) in the chemicals database but is allowed in EU cosmetics at max 0.2%.
Source: Cosmetics: ingredients.eu_status/eu_max; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Reducing Agent
Safety Rating
MODERATE
Chemistry & Identifiers
InChIKey
JVBXVOWTABLYPX-UHFFFAOYSA-L
Regulatory Status
EU EU Status
permitted
EU Max Conc.
0.2%
US US Status
permitted
US Notes
Permitted; related sulfites reviewed by CIR — safe as used; GRAS for food (related sulfites)
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Sodium Hydrosulfite.
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
FlamFlame
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.
EU CLP Annex VI Harmonized Classification
Legally binding harmonized classification per Regulation (EC) No 1272/2008 (CLP) Annex VI.
Signal Word
Danger
Pictograms
FlammableHarmful / Irritant
Hazard Class and Category
Self-heat. 1; Acute Tox. 4 *
Hazard Statements
- H251
- H302 Harmful if swallowed
Inserted via ATP: CLP00
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
10,000 - 100,000 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Hazard classification: Restricted (Annex XVII)
PubChem Annotations
Safety and regulatory annotations from PubChem (NCBI) aggregated sources.
Safety (2)
ICSC Safety Card
1717
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Skin Eye Respiratory Irritation
Irritating to skin, eyes, and respiratory system.
Source: Hazardous Substances Data Bank (HSDB)
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Reducing agent
Viscosity modifier
Regulatory List Membership (1)
FDA Substances Added to Food (EAFUS)
Expert Verdict
Expert safety assessment and concern-level summary for Sodium Hydrosulfite.
Regulatory Flags
fda_food_additive
Known Synonyms
Caswell No. 774
EINECS 231-890-0
EPA Pesticide Chemical Code 078202
Sodium hyposulfite
Hydrosulfite R Conc
UNII-2K5B8F6ES1
sodium sulfoxylate
Chemical Function
Viscosity modifier
Reducing agent
Regulatory Lists
food_additive; Substances Added to Food (formerly EAFUS) (2/2019)
Australian Status
AICIS status: listed
Cross-Vertical Safety Context
Same-CAS public records found in pharmaceutical data.
SOURCE
ChEMBL / DrugCentral / FAERS
DB_PHARMA CAS match
Pharmaceutical Data
Same-CAS rows from the pharmaceutical spoke database.
ChEMBL ID
CHEMBL3410462
Frequently Asked Questions
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.
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.
Is Sodium Hydrosulfite used outside cosmetics?
Sodium Hydrosulfite also appears in industrial chemical safety and pharmaceutical data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Sodium Hydrosulfite have different safety status in cosmetics vs industrial chemicals?
Sodium Hydrosulfite is classified GHS Danger (H251, H302, H315, H319, H303, H402, H412) in the chemicals database but is allowed in EU cosmetics at max 0.2%.
Compliance Tools
Check Sodium Hydrosulfite compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
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