Sodium bromate

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Sodium bromate
Sodium bromate
The sodium cation The bromate anion (space-filling model)
Identifiers
CAS number 7789-38-0 YesY
PubChem 23668195
ChemSpider 23009 YesY
EC number 232-160-4
UN number 1494
ChEBI CHEBI:75229 N
RTECS number EF8750000
Jmol-3D images Image 1
Properties
Molecular formula NaBrO3
Molar mass 150.892 g/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
Refractive index (nD) 1.594
Structure
Crystal structure cubic
Thermochemistry
Std molar
entropy
So298
130.5 J/mol K
Std enthalpy of
formation
ΔfHo298
-342.5 kJ/mol
Gibbs free energy ΔG -252.6 kJ/mol
Hazards
MSDS ICSC 0196
EU Index Not listed
R-phrases R8, R36, R37, R38
S-phrases S26, S27, S36, S37, S39
Main hazards Oxidizing agent
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazard OX: Oxidizer. E.g., potassium perchlorateNFPA 704 four-colored diamond
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 noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

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

Uses[edit]

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[edit]

Sodium bromate is produced by passing bromine into a solution of sodium carbonate. 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.

External links[edit]