Sodium bicarbonate

Sodium bicarbonate
	; Crystal structure
Na+ coordination	HCO3− coordination
Names
	IUPAC name sodium hydrogencarbonate
	Other names Baking soda, bicarb (laboratory slang), bicarbonate of soda, nahcolite, natrium hydrogen carbonate, natron
Identifiers
CAS Number	144-55-8 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	4153970
ChEBI	CHEBI:32139 ;
ChEMBL	ChEMBL1353 ;
ChemSpider	8609 ;
DrugBank	DB01390 ;
ECHA InfoCard	100.005.122
EC Number	205-633-8;
E number	E500(ii) (acidity regulators, ...)
IUPHAR/BPS	4507;
KEGG	C12603 ;
MeSH	Sodium+bicarbonate
PubChem CID	516892;
RTECS number	VZ0950000;
UNII	8MDF5V39QO ;
CompTox Dashboard (EPA)	DTXSID9021269 ;
	InChI InChI=1S/CH2O3.Na/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1 Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M ; InChI=1/CH2O3.Na/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1 Key: UIIMBOGNXHQVGW-REWHXWOFAQ;
	SMILES [Na+].OC([O-])=O;
Properties
Chemical formula	NaHCO; 3
Molar mass	84.0066 g mol−1
Appearance	White crystals
Odor	Odorless
Density	2.20 g/cm3;
Melting point	(Decomposes to sodium carbonate starting at 50 °C)
Solubility in water	69 g/L (0 °C); 96 g/L (20 °C); 165 g/L (60 °C);
Solubility	0.02 wt% acetone, 2.13 wt% methanol @22 °C. insoluble in ethanol
log P	−0.82
Acidity (pKa)	6.34; 6.351 (carbonic acid);
Refractive index (nD)	nα = 1.377 nβ = 1.501 nγ = 1.583
Structure
Crystal structure	Monoclinic
Thermochemistry
Heat capacity (C)	87.6 J/mol K
Std molar; entropy (S⦵298)	101.7 J/mol K
Std enthalpy of; formation (ΔfH⦵298)	−950.8 kJ/mol
Gibbs free energy (ΔfG⦵)	−851.0 kJ/mol
Pharmacology
ATC code	B05CB04 (WHO) B05XA02 (WHO), QG04BQ01 (WHO)
Routes of; administration	Intravenous, oral
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Causes serious eye irritation
NFPA 704 (fire diamond)	2 0 1
Flash point	Incombustible
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	4220 mg/kg (rat, oral)
Safety data sheet (SDS)	External MSDS
Related compounds
Other anions	Sodium carbonate
Other cations	Ammonium bicarbonate; Potassium bicarbonate;
Related compounds	Sodium bisulfate; Sodium hydrogen phosphate;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Sodium bicarbonate (IUPAC name: sodium hydrogencarbonate), commonly known as baking soda or bicarbonate of soda, is a chemical compound with the formula NaHCO₃. It is a salt composed of a sodium cation (Na⁺) and a bicarbonate anion (HCO₃⁻). 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.

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