Explore relationships

Baking soda

Crystal structureNames IUPAC namesodium hydrogen carbonateOther names Baking soda, bicarb (colloquial), bicarbonate of soda, nahcolite, natrium hydrogen carbonate, natronIdentifiers CAS Number144-55-83D model (JSmol)Interactive imageBeilstein Reference4153970 ChEBICHEBI:32139ChEMBLChEMBL1353ChemSpider8609DrugBankDB01390ECHA InfoCard100.005.122EC Number205-633-8E numberE500(ii) (acidity regulators, ...)IUPHAR/BPS4507KEGGC12603MeSHSodium+bicarbonatePubChemCID516892RTECS numberVZ0950000UNII8MDF5V39QOCompTox Dashboard(EPA)DTXSID9021269InChIInChI=1S/CH2O3.Na/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1Key: UIIMBOGNXHQVGW-UHFFFAOYSA-MInChI=1/CH2O3.Na/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1Key: UIIMBOGNXHQVGW-REWHXWOFAQSMILES[Na+].OC([O-])=OProperties Chemical formulaNaHCO3Molar mass84.006 g·mol Appearance White crystals OdorOdorless Density2.20 g/cmMelting point(Decomposes to sodium carbonate starting at 50 °C) Solubility in water69 g/L (0 °C)96 g/L (20 °C)165 g/L (60 °C)Solubility0.02 wt% acetone, 2.13 wt% methanol @22 °C., insoluble in ethanollog P−0.82 Acidity (pKa) 6.346.351 (carbonic acid)Refractive index (nD)nα = 1.377 nβ = 1.501 nγ = 1.583 Structure Crystal structureMonoclinic Thermochemistry Heat capacity(C)87.6 J/mol K Std molarentropy(S298)101.7 J/mol K Std enthalpy offormation(ΔfH298)−950.8 kJ/mol Gibbs free energy(ΔfG)−851.0 kJ/mol Pharmacology ATC codeB05CB04 (WHO) B05XA02 (WHO), QG04BQ01 (WHO) Routes ofadministrationIntravenous, oral Hazards Occupational safety and health (OHS/OSH): Main hazardsCauses serious eye irritation NFPA 704 (fire diamond) 201Flash pointIncombustible Lethal dose or concentration (LD, LC): LD50 (median dose)4220 mg/kg (rat, oral) Safety data sheet (SDS) External MSDSRelated compounds Other anionsSodium carbonateOther cationsAmmonium bicarbonatePotassium bicarbonateRelated compoundsSodium bisulfateSodium hydrogen phosphateExcept where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Yverify ( ?)

Use + to expand a branch. Click a topic name to open its summary.