Is Sodium Oxide safe in cosmetics?
Sodium Oxide has a safety rating of "MODERATE" in our database. EU status: restricted. US status: permitted.
Sodium Oxide
Also known as: Sodium oxide (Na2O), EINECS 215-208-9, UNII-3075U8R23D
INCI: SODIUM OXIDE
Sodium Oxide (CAS 1313-59-3) is a cosmetic cosmetic ingredient functioning as Buffering (pH adjuster). EU Regulation 1223/2009 status: restricted; GHS signal word DANGER. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 1313-59-3 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Sodium Oxide is classified GHS Danger (H314, H318) in the chemicals database but is restricted in EU cosmetics.
Source: Cosmetics: ingredients.eu_status; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Buffering (pH adjuster)
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
disodium;oxygen(2-)
InChIKey
KKCBUQHMOMHUOY-UHFFFAOYSA-N
Regulatory Status
EU EU Status
restricted
US US Status
permitted
US Notes
Permitted for cosmetic use; no specific restrictions
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 Oxide.
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
DANGER
Pictograms
Corr
Hazard Statements
Causes severe skin burns and eye damage
Short-term Exposure Effects
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of the aerosol may cause lung oedema. See Notes. Medical observation is indicated.
Routes of Exposure
Serious by all routes of exposure.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
10 - 100 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
PubChem Annotations
Safety and regulatory annotations from PubChem (NCBI) aggregated sources.
Safety (1)
ICSC Safety Card
1653
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Adsorbent
Binder
Flux agent
pH regulating agent
Expert Verdict
Expert safety assessment and concern-level summary for Sodium Oxide.
Known Synonyms
Sodium oxide (Na2O)
EINECS 215-208-9
UNII-3075U8R23D
Chemical Function
pH regulating agent
Binder
Regulatory Lists
drinking_water; Europe; manufacturing; plastic_additive
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Sodium Oxide allowed in the EU?
Sodium Oxide EU regulatory status: restricted. This is based on EU Regulation 1223/2009 and its amendments.
What does Sodium Oxide do in cosmetics?
Sodium Oxide functions as: Buffering (pH adjuster). It is classified as a cosmetic ingredient in our database. CAS number: 1313-59-3.
Is Sodium Oxide classified as hazardous under GHS?
Sodium Oxide carries a GHS signal word of "DANGER". Hazard statements: Causes severe skin burns and eye damage. 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 Oxide used outside cosmetics?
Sodium Oxide also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Sodium Oxide have different safety status in cosmetics vs industrial chemicals?
Sodium Oxide is classified GHS Danger (H314, H318) in the chemicals database but is restricted in EU cosmetics.
Compliance Tools
Check Sodium Oxide 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
Compare limits across jurisdictions
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SODIUM (ASTROCARYUM VULGARE/EUTERPE OLERACEAE/PALM) FRUIT/(ASTROCARYUM VULGARE/PALM) KERNEL/(ASTROCARYUM MURUMURU/BABASSU/BERTHOLLETIA EXCELSA/CARAPA GUIANENSIS/COCOA/FEVILLEA TRILOBATA/PASSIFLORA EDULIS/THEOBROMA GRANDIFLORUM) SEEDATE
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