- beauty
- cleaning
- industrial
Sodium sesquicarbonate
E500 · CAS 72227-05-5
Also registered as 4 other CAS numbers
8014-64-0 · 2270871-68-4 · 2423955-66-0 · 533-96-0
Concern score
Not assessed — no hazard data yet.
Sodium sesquicarbonate in plain language
Also known as Carbonic acid, sodium salt (2:3) · Magadi soda · Snowflake crystals · Sodium-salt of carbonic acid · Sq 810 · Sodium carbonate hydrogen carbonate (3/1/1)
Show all 29 names
trisodium;hydrogen carbonate;carbonate · E-500(III) · Hydrogenodicarbonate de trisodium · Ins NO.500(III) · INS-500(III) · Natriumsesquicarbonat · Sodium monohydrogendicarbonate · Solvay t 200 · SQ 810 Bulk · Sesqui TM · Snowfine · Sodium carbonate (3:2) · Trisodium hydrogendicarbonate · Trona · Urao · hidrogenodicarbonato de trisodio · sodium sesqicarbonate (10-15%) · sodium sesqui carbonate · sodium sesquicarbonate (10-15%) · sodium sesquicarbonate (na2co3.nahco3) · sodium sesquicarbonate cas# 533-96-0 · sodium sesquicarbonate castable · SQ-810
Used in cosmetics as a cleansing agent, a pH buffer and a bulking agent.
- Cleansing
- Buffering
- Bulking
- Chelating agent
- pH adjuster
- Cleaning agent
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
As a food additive
- E500
- Raising agent
- Acidity regulator
- Anti-caking agent
Authorised in the EU without a numerical limit (Group I); EFSA re-evaluation not yet published.
It never counts as an additive of concern in a product’s food rating.
Regulation (EC) No 1333/2008, Annex II Part C(1) Group I (quantum satis)
Regulation
No restrictions found. Sodium sesquicarbonate appears in these published regulatory listings.
- Found in consumer products
- Beauty
- Cleaning
- Industrial
EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 117 composition records across product categories including Cleaning and safety, Batteries, Specialty occupational products. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Cleaning agent, Filler.
- EPA CPDat observed this chemical in 117 composition records across product categories including Cleaning and safety, Batteries, Specialty occupational products. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Cleaning agent, Filler.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Expert safety opinions
No expert opinion on file for Sodium sesquicarbonate. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.
SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.
Evidence & sources
No graded research studies for Sodium sesquicarbonate yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
CosIng
regulatory · updated 2026-09-23
- Open →
EPA Chemical and Products Database
exposure · updated September 2013
- Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
- Open →
FDA GSRS UNII
registry · updated 2026-02-26
- Open →
openFDA Substance
registry · updated 2026-05-24
- Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Reference links (1)
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Fragrance avoidance
Nothing to weigh for this context yet.
We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.
Where it has been recorded
How often EPA CPDat has listed Sodium sesquicarbonate in a product composition. These are source records, not Greenveil catalog products.
Source records
117
Named organisations
6
Cleaning and safetyBatteriesSpecialty occupational productsLaboratory suppliesCleaning products and household careHome maintenance
Typical roles
CleansingBufferingBulkingChelating agentpH adjusterCleaning agent
Found in these products
Cosmetic and personal-care products that list Sodium sesquicarbonate are shown first. Their ingredient lists include Sodium sesquicarbonate; each product's own rating depends on its whole formula, so it is shown on the product page, not here.
