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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 2735133Generated: October 23, 2026

Sodium Carbonate Monohydrate

NA2CO3 · SODA ASH · SODA · DENSE SODA ASH · SODIUM CARBONATE DENSE · DENSE SODIUM CARBONATE · SODIUM CARBONATE-1-HYDRATE · CARBONIC ACID DISODIUM SALT

https://huagongshe.com/en/chemical/2735133

Sodium Carbonate Monohydrate molecular structure

Identifiers & Physical Properties

CAS No.5968-11-6
Molecular formulaNa2CO3.H2O
Average molar mass124 g/mol
Monoisotopic mass123.9748471 g/mol
SMILESO.O=C([O-])[O-].[Na+].[Na+]
InChIKeyMQRJBSHKWOFOGF-UHFFFAOYSA-L
PubChem CID2735133
EC No.619-709-7
DTXSIDDTXSID40208366

Chemical & Physical Properties

Topological polar surface area64.2
Hydrogen bond donors1
Hydrogen bond acceptors4
Rotatable bonds0
Heavy atoms7
Formal charge0
Complexity18.8
Chemical classesMetals -> Metals, Inorganic Compounds
Density2.53 @25 °C
Melting point851 °C851 °C(lit.)
Physical DescriptionOdorless solid[Merck Index] Colorless to white odorless powder or granulesHygroscopic[Alfa Aesar MSDS]
Boiling point1600 °C
Storage conditionsStore at RT.
SolubilityH2O: 1 M at 20 °C, clear, colorlessSoluble in water. Insoluble in alcoholSoluble in water and glycerol. Insoluble in alcohol, acetone, alkyl acetates,benzonitrile and liquid ammonia.
Physical statePowder/Solid
Specific gravity2.25
ColorWhite
pH11-12 (25°C, 50g/L in H2O)
SensitivityHygroscopic
Merck14,8596
Dielectric constant3.0(Ambient)
StabilityStable. Incompatible with strong acids, aluminium, fluorine, lithium, phosphorus oxides.
InChI1S/CH2O3.2Na.H2O/c2-1(3)4/h(H2,2,3,4)1H2/q2*+1/p-2
InChIKeyMQRJBSHKWOFOGF-UHFFFAOYSA-L
SMILESO.[Na+].[Na+].[O-]C([O-])=O
LogP (partition coefficient)-0.809 (est)
CAS DataBase Reference5968-11-6(CAS DataBase Reference)
FDA UNII2A1Q1Q3557
EPA Substance Registry SystemSodium carbonate, monohydrate (5968-11-6)
UNSPSC Code12352302
NACRESNA.55
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH319
GHS precautionary statementsP264-P280-P305+P351+P338-P337+P313
Hazard symbolsXi
Risk statements (R)36
Safety statements (S)26-22
Water hazard class (WGK)1
RTECS numberVZ4050000
F3
TSCA inventory statusYes
Customs code28362000
Storage class11 - Combustible Solids
Hazard classEye Irrit. 2

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 2.3% (5 of 219) of reports.WarningH319 (97.7%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]P264+P265, P280, P305+P351+P338, and P337+P317 (click each P-code to see the statement)Aggregated GHS information provided per 219 reports by companies from 6 notifications to the ECHA C&L Inventory.
Regulatory informationSodium carbonate, monohydrate: Does not have an individual approval but may be used under an appropriate group standard
Hazards summaryOverexposure to dust or vapor causes mucous membrane irritation and coughingA skin irritant[Merck Index] An eye irritant in rabbitsMarketed in small quantities compared to the anhydrous form[OECD SIDS] A strong eye irritant[Alfa Aesar MSDS] See Sodium carbonate.
EPA Safer ChemicalChemical: Sodium carbonate, monohydrate
Hazard Classes and CategoriesEye Irrit. 2 (97.7%)
Protective Action Criteria (PAC)8.9 [mg/m3]97 [mg/m3]580 [mg/m3]
F3
Water hazard class (WGK)1
TSCA inventory statusYes
RTECS numberVZ4050000
Customs code28362000
Risk statements (R)36
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
Safety statements (S)26-22
Storage class11 - Combustible Solids
GHS hazard statementsH319
Hazard classEye Irrit. 2
GHS precautionary statementsP264-P280-P305+P351+P338-P337+P313

Applications & Uses

Uses

Buffers; pH adjustment.

Uses

Sodium Carbonate Monohydrate can be used for sterilization or virus inactivating agent composition.

Uses

Buffer component, may be used for the removal of peripheral membrane proteins.

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