Sodium carbonate is an organic sodium salt and a carbonate salt.
How much products actually contain
No product states its amount yet.
Of the products containing it, 19 list it before the 1% line and 37 after it (usually 1% or less).
Products using this ingredient
12 of 55 confirmed · likeliest to carry enough first · See all 55
JUSTJUST Swiss Salt 500g (2 Types)
ENANDCarbonated Therapy Face Wash
ENANDCarbonated Therapy Face Wash
MOREMO KeratinLow-Damage Hair Bleach
ENANDCarbonated Sparkling Powder Shampoo
ENANDCarbonated Therapy Cleansing Powder Upgrade Version
ENANDCarbonated Therapy Cleansing Powder
ENANDNEW Carbonated Therapy Cleansing Powder
TENZEROTENZERO Calming Heartleaf Body Wash
TENZEROTENZERO Clearing Tea Tree Body Wash
TatchaTatcha The Rice Wash
CNP LaboratoryInvisible Peeling Cleansing Gel
Definition
Sodium carbonate is an organic sodium salt and a carbonate salt.
Source: PubChem
US FDA substance register · UNII 45P3261C7T · registered name Sodium Carbonate · single chemical substance
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
Other restriction: ban substances that deplete the ozone layer
Source: EU CosIng ingredient list
Reviewed by CIR: Re-review Summary of Sodium Sesquicarbonate, Sodium Carbonate and Sodium Bicarbonate as Used in Cosmetics
Reviewed by CIR: Annual Review of Cosmetic Ingredient Safety Assessments - 2004/2005
Reviewed by CIR: Final Report on the Safety Assessment of Sodium Sesquicarbonate, Sodium Bicarbonate, and Sodium Carbonate
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name 炭酸Ｎａ: 本品は、炭酸の二ナトリウム塩であり、次の化学式で表される。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 497-19-8
- EC No.EU chemical inventory number
- 207-838-8
- DTXSIDUS EPA chemical ID
- DTXSID1029621
- DTXCIDUS EPA compound ID
- DTXCID109621
- IUPAC
- Disodium carbonate
- Molecular formula
- CNa2O3
- Molecular weight
- 105.988 g/mol
Measured properties
- Appearance
- Dry Powder, Other Solid, Large Crystals, CBI, Liquid, Wet Solid · Colourless crystals or white, granular or crystalline powder, The anhydrous form is hygroscopic, the decahydrate efflorescent
- Odour
- Odorless · odourless
- Boiling point
- Decomposes on heating by CO2 loss
- Melting point
- 856 °C · 851 °C
- Solubility
- Freely soluble in water. Insoluble in ethanol · In water, 30.7 g/100 g water at 25 °C
- Density
- 2.54 g/cu cm · Odorless, small crystals or crystalline powder, alkaline taste. Stable at ordinary temperatures and atmospheric conditions, dries out somewhat in warm, dry air above 50 °C, becomes anhydrous at 100 °C. Density: 2.25, also reported at 1.55. Soluble in 3 parts water, 1.8 parts boiling water, 7 parts glycerol. Insoluble in alcohol. /Sodium carbonate monohydrate/
- Stability
- Hygroscopic. Stable under recommended storage conditions.
- pH
- Aqueous solutions are strongly alkaline. At 25 °C, the pH of 1, 5 and 10 wt% sodium carbonate solutions are 11.37, 11.58 and 11.70, respectively. · 11.5
- Colour
- white
- Melting/freezing point
- 851 ℃
- Initial boiling point and range
- 100 ℃
- Vapour pressure
- (9.92E-017mmHg (25℃, est.))
- Water solubility
- 0.215 g/㎖ ( 20℃)
- Relative density
- 2.5 ( g/cm³)
- n-Octanol/water partition coefficient (Kow)
- -6.19 (est.)
- Molecular weight
- 105.99
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: PubChem · KOSHA safety data sheets (Korea)
What products actually use it for
What the 746 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Chelating agent478
- pH regulating agent110
- Flow promoter55
- Cleaning agent33
- Corrosion inhibitor11
- Processing aids not otherwise specified11
- Filler6
- Chemical reaction regulator5
22 other uses
- Surfactant (surface active agent)5
- Intermediate3
- Surface modifier3
- Preservative2
- Degradant/impurity (EPA)2
- No specific technical function2
- Brightener2
- Foamant2
- Solids separation (precipitating) agent, not other2
- Softener and conditioner2
- Antioxidant1
- Flux agent1
- Adsorbent1
- Tanning agents not otherwise specified1
- Bleaching agent1
- Plating agent1
- Insulators1
- Other1
- Reducing agent1
- Food preservative (EPA)1
- Flavouring and nutrient1
- Catalyst1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
5 skin studies and 9 eye studies are on record.
The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 14 studies
- Classification not possible
Skin Sensitization · Screening - Not classified
Skin Irritation · Screening - Category 6.3A (Category 2)
Skin Irritation · Read Across - Category 6.3B (Category 3)
Skin Irritation · Read Across - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to - Severe Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to - Eye Irrit. 2
Eye Irritation · Authoritative - Category 6.4A (Category 2A)
Eye Irritation · Read Across - Category 1
Eye Irritation · Screening - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to - Serious eye damage/eye irritation - Category 2A
Eye Irritation · Screening - Severe Irritation
eye irritation: in vivo · Screening · other guideline: EPA 16 CFR 1500.42 according to - Eye damage - category 1
Eye Irritation · Screening - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to
Source: US EPA CompTox dashboard
Related literature
- Effectiveness of dimeticone oils versus sodium carbonate solution in the treatment of tungiasis in Kenya: a non-inferiority randomised trial · 2026
- Re-Review Summary of Sodium Sesquicarbonate, Sodium Carbonate, and Sodium Bicarbonate as Used in Cosmetics · 2025
- Development and evaluation of a rapid dermic adhesive test containing alizarine red and sodium carbonate for the diagnosis of diabetic neuropathy · 2025
- A pilot study of dimeticone oils versus sodium carbonate treatment for tungiasis: A randomized cohort trial in Homa Bay County, Kenya · 2024
- Protocol for a Randomized Control Trial for Tungiasis Treatment in Homa Bay County, Kenya: Dimeticone versus Sodium Carbonate · 2023
Linked databases 21
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- NIST Chemistry WebBook
- PubChem 2
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US Cosmetic Ingredient Review (CIR) 2 3 4
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · Korean · English · Japanese · Chinese