Sodium bromate

Sodium bromate, the inorganic compound with the chemical formula of NaBrO₃, is the sodium salt of bromic acid. It is a strong oxidant.

Sodium bromate

Sodium bromate
The sodium cation The bromate anion (space-filling model)
Names
IUPAC name Sodium bromate
Other names Sodium bromate(V) Bromic acid, sodium salt
Identifiers
CAS Number	7789-38-0 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:75229 Y
ChemSpider	23009 Y
ECHA InfoCard	100.029.237
EC Number	232-160-4
PubChem CID	23668195
RTECS number	EF8750000
UNII	U54JK6453O Y
UN number	1494
CompTox Dashboard (EPA)	DTXSID9023837
InChI InChI=1S/BrHO3.Na/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1 Y Key: XUXNAKZDHHEHPC-UHFFFAOYSA-M Y InChI=1/BrHO3.Na/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1 Key: XUXNAKZDHHEHPC-REWHXWOFAY
SMILES [Na+].[O-]Br(=O)=O
Properties
Chemical formula	NaBrO3
Molar mass	150.89g/mol
Appearance	colorless or white solid
Odor	odorless
Density	3.339 g/cm3
Melting point	381 °C (718 °F; 654 K)
Boiling point	1,390 °C (2,530 °F; 1,660 K)
Solubility in water	27.5 g/100 mL (0 °C) 36.4 g/100 mL (20 °C) 48.8 g/100 mL (40 °C) 90.8 g/100 mL (100 °C)
Solubility	soluble in ammonia insoluble in ethanol
Magnetic susceptibility (χ)	−44.2·10−6 cm3/mol
Refractive index (nD)	1.594
Structure
Crystal structure	cubic
Thermochemistry
Std molar entropy (S⦵298)	130.5 J/mol K
Std enthalpy of formation (ΔfH⦵298)	−342.5 kJ/mol
Gibbs free energy (ΔfG⦵)	−252.6 kJ/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Oxidizing agent
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H271, H272, H302, H315, H319, H335, H341, H350
Precautionary statements	P201, P202, P210, P220, P221, P261, P264, P270, P271, P280, P281, P283, P301+P312, P302+P352, P304+P340, P305+P351+P338, P306+P360, P308+P313, P312, P321, P330, P332+P313, P337+P313, P362, P370+P378, P371+P380+P375, P403+P233, P405, P501
NFPA 704 (fire diamond)	1 0 0 OX
Flash point	381 °C (718 °F; 654 K)
Safety data sheet (SDS)	ICSC 0196
Related compounds
Other anions	Sodium chlorate Sodium iodate
Other cations	Potassium bromate Calcium bromate
Related compounds	Sodium bromide Sodium hypobromite Sodium bromite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Uses

Sodium bromate is mainly used in continuous or batch dyeing processes involving sulfur or vat dyes and as a hair-permagent, chemical agent, or gold solvent in gold mines when used with sodium bromide.

Production

Sodium bromate can be produced from a solution of sodium carbonate and bromine using chlorine gas as the oxidising agent.^[1]

6 Na₂CO₃ + Br₂ + 5 Cl₂ → 2 NaBrO₃ + 10 NaCl + 6 CO₂

It may also be produced by the electrolytic oxidation of aqueous sodium bromide.^[2]

Human health issues

Bromate in drinking water is undesirable because it is a suspected human carcinogen.^[3][4] Its presence in Coca-Cola's Dasani bottled water forced a recall of that product in the UK.^[5]