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Sodium bicarbonate

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Sodium bicarbonate

Names IUPAC name Sodium hydrogen carbonate Other names Baking soda, bicarbonate of soda, nahcolite Identifiers CAS Number Beilstein Reference ChEBI ChEMBL ChemSpider DrugBank EC Number IUPHAR/BPS Jmol interactive 3D KEGG MeSH PubChem RTECS number UNII InChI[show]

144-55-8 4153970 CHEBI:32139 ChEMBL1353 8609 DB01390 205-633-8 4507 Image C12603 Sodium+bicarbonate 516892 VZ0950000 8MDF5V39QO

SMILES[show] Properties Chemical formula Molar mass

NaHCO 3 84.0066 g mol−1

Appearance Odor Density Melting point

Solubility in water

Solubility log P

White crystals odorless 2.20 g/cm3 as a solid[1] 1.1 to 1.3 as a powder[2] 50 °C (122 °F; 323 K) (decomposes to sodium carbonate) 9 g/100 mL 69 g/L (0 °C)[3] 96 g/L (20 °C)[4] 165 g/L (60 °C)[4] 236 g/L (100 °C)[3] 0.02 %wt acetone, 2.13 %wt methanol @22 °C.[5] insoluble in ethanol -0.82 10.329[6]

Acidity (pKa)

6.351 (carbonic acid)[6]

Refractive index (nD)

1.3344 Structure

Crystal structure

monoclinic Thermochemistry

Specific heat capacity (C) Std molar entropy (So298) Std enthalpy of formation (ΔfHo298)

87.61 J/mol K 102 J/mol K -947.7 kJ/mol

Gibbs free energy (ΔfG˚) -851.9 kJ/mol Pharmacology ATC code

B05CB04 B05XA02, QG04BQ01

Routes of istration

Intravenous, oral

Main hazards Safety data sheet

Hazards Causes serious eye irritation External MSDS

NFPA 704 Flash point incombustible Lethal dose or concentration (LD, LC): LD50 (Median dose) 4220 mg/kg ( rat, oral ) [7] Related compounds

Other anions Other cations

Sodium carbonate Ammonium bicarbonate Potassium bicarbonate Sodium bisulfate

Related compounds

Sodium hydrogen phosphate

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). (what is ?) Infobox references Sodium bicarbonate[note 1] (IUPAC name: sodium hydrogen carbonate) is a chemical compound with the formula NaHCO3. It is a salt composed of sodium ions and bicarbonate ions. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. It has a slightly salty, alkaline taste resembling that of washing soda (sodium carbonate). The natural mineral form is nahcolite. It is a component of the mineral natron and is found dissolved in many mineral springs. It is among the food additives encoded by European Union, identified as E 500. Since it has long been known and is widely used, the salt has many related names such as baking soda, bread soda, cooking soda, and bicarbonate of soda.[note 2] The word saleratus, from Latin sal æratus meaning "aerated salt", was widely used in the 19th century for both sodium bicarbonate and potassium bicarbonate.