Sodium bromate

Sodium bromate
Names
	IUPAC name Sodium bromate
	Other names Sodium bromate(V); Bromic acid, sodium salt
Identifiers
CAS Number	7789-38-0 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:75229 ;
ChemSpider	23009 ;
ECHA InfoCard	100.029.237
EC Number	232-160-4;
PubChem CID	23668195;
RTECS number	EF8750000;
UNII	U54JK6453O ;
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 Key: XUXNAKZDHHEHPC-UHFFFAOYSA-M ; 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 (So298)	130.5 J/mol K
Std enthalpy of; formation (ΔfH⦵298)	-342.5 kJ/mol
Gibbs free energy (ΔfG˚)	-252.6 kJ/mol
Hazards
Main hazards	Oxidizing agent
Safety data sheet	ICSC 0196
R-phrases (outdated)	R8, R36, R37, R38
S-phrases (outdated)	S26, S27, S36, S37, S39
NFPA 704 (fire diamond)	0 1 0 OX
Flash point	381 °C (718 °F; 654 K)
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).

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

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 is produced by passing bromine into a solution of sodium carbonate.^[1] It may also be produced by the electrolytic oxidation of sodium bromide. Alternatively, it can also be created by the oxidation of bromine with chlorine to sodium hydroxide at 80 °C.

3 Br₂+3 NaCO₃=5 NaBr+NaBrO₃+3 CO₂

Human health issues

Bromate in drinking water is undesirable because it is a suspected human carcinogen.^[2]^[3] Its presence in Coca-Cola's Dasani bottled water forced a recall of that product in the UK.^[4]

References

^ https://chemiday.com/en/reaction/3-1-0-1145
^ "Potassium Bromate (Group 2B)". International Agency for Research on Cancer: Summaries and Evaluations. Canadian Centre for Occupational Health and Safety. Retrieved 2008-03-09.
^ Kurokawa, Yuji; Maekawa, A; Takahashi, M; Hayashi, Y (July 1990). "Toxicity and carcinogenicity of potassium bromate—a new renal carcinogen". Environmental Health Perspectives. 87: 309–35. doi:10.1289/EHP.9087309. JSTOR 3431039. PMC 1567851. PMID 2269236.
^ "Coke recalls controversial water". BBC News. 2004-03-19. Retrieved 2008-03-09.

External links

Sodium Bromate MSDS

[1] ttps://chemiday.com/en/reaction/3-1-0-1145

[2] "Potassium Bromate (Group 2B)". International Agency for Research on Cancer: Summaries and Evaluations. Canadian Centre for Occupational Health and Safety. Retrieved 2008-03-09.

[3] Kurokawa, Yuji; Maekawa, A; Takahashi, M; Hayashi, Y (July 1990). "Toxicity and carcinogenicity of potassium bromate—a new renal carcinogen". Environmental Health Perspectives. 87: 309–35. doi:10.1289/EHP.9087309. JSTOR 3431039. PMC 1567851. PMID 2269236.

[4] "Coke recalls controversial water". BBC News. 2004-03-19. Retrieved 2008-03-09.

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