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Sodium bromate

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Sodium bromate
Sodium bromate
Sodium bromate
The sodium cation
The sodium cation
The bromate anion (space-filling model)
The bromate anion (space-filling model)
Names
IUPAC name Sodium bromate
Other names Sodium bromate(V)
Bromic acid, sodium salt
Identifiers
CAS Number
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.237 Edit this at Wikidata
EC Number
  • 232-160-4
PubChem CID
RTECS number
  • EF8750000
UNII
UN number 1494
CompTox Dashboard (EPA)
InChI
  • InChI=1S/BrHO3.Na/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1Key: XUXNAKZDHHEHPC-UHFFFAOYSA-M
  • InChI=1/BrHO3.Na/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1Key: XUXNAKZDHHEHPC-REWHXWOFAY
SMILES
  • .Br(=O)=O
Properties
Chemical formula NaBrO3
Molar mass 150.89g/mol
Appearance colorless or white solid
Odor odorless
Density 3.339 g/cm
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 cm/mol
Refractive index (nD) 1.594
Structure
Crystal structure cubic
Thermochemistry
Std molar
entropy (S298) 		130.5 J/mol K
Std enthalpy of
formation (ΔfH298) 		-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 GHS03: OxidizingGHS07: Exclamation markGHS08: Health hazard
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)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
1 0 0OX
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 , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound
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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 can be produced from a solution of sodium carbonate and bromine using chlorine gas as the oxidising agent.

6 Na 2 CO 3 + Br 2 + 5 Cl 2 ⟶ 2 NaBrO 3 + 10 NaCl + 6 CO 2 {\displaystyle {\ce {6 Na2CO3 + Br2 + 5 Cl2 -> 2 NaBrO3 + 10 NaCl + 6 CO2}}}

It may also be produced by the electrolytic oxidation of aqueous sodium bromide.

Human health issues

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


References

  1. CN patent 1034653C, Zhao Naizhi; Wu Zongsheng; Sun Guishi, published 1997-04-23, assigned to Daqinghe Saltern Changlu Hebei Prov. 
  2. WO patent 1996030562A1, David B. Blum; Rodney H. Sergent; Vadim Zolotarsky, "Process and apparatus for generating bromine", published 1996-10-03, assigned to Electrocatalytic Inc 
  3. "Potassium Bromate (Group 2B)". International Agency for Research on Cancer: Summaries and Evaluations. Canadian Centre for Occupational Health and Safety. Retrieved 2008-03-09.
  4. 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.
  5. "Coke recalls controversial water". BBC News. 2004-03-19. Retrieved 2008-03-09.

Notes

External links

Sodium compounds
Inorganic
Halides
Chalcogenides
Pnictogenides
Oxyhalides
Oxychalcogenides
Oxypnictogenides
Others
Organic
Compounds containing the bromate group
HBrO3 He
Li Be B C N O F Ne
NaBrO3 Mg Al Si P S Cl Ar
KBrO3 Ca(BrO3)2 Sc(BrO3)3 Ti V Cr Mn(BrO3)2 Fe(BrO3)3 Co(BrO3)2 Ni(BrO3)2 Cu(BrO3)2 Zn(BrO3)2 Ga Ge As Se Br2O3
Br2O5 		Kr
RbBrO3 Sr(BrO3)2 Y(BrO3)3 Zr Nb Mo Tc Ru Rh Pd AgBrO3 Cd In Sn Sb Te I Xe
Cs Ba(BrO3)2 * Lu(BrO3)3 Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
* La(BrO3)3 Ce(BrO3)3 Pr(BrO3)3 Nd(BrO3)3 Pm(BrO3)3 Sm(BrO3)3 Eu(BrO3)3 Gd(BrO3)3 Tb(BrO3)3 Dy(BrO3)3 Ho(BrO3)3 Er(BrO3)3 Tm(BrO3)3 Yb(BrO3)3
** Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No


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