Chemistry:Sodium bromate
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| Names | |||
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| IUPAC name
Sodium bromate
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| Other names
Sodium bromate(V)
Bromic acid, sodium salt | |||
| Identifiers | |||
3D model (JSmol)
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| ChEBI | |||
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| EC Number |
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PubChem CID
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| RTECS number |
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| UNII | |||
| UN number | 1494 | ||
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| Properties | |||
| 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) | ||
| 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 | ||
| −44.2·10−6 cm3/mol | |||
Refractive index (nD)
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1.594 | ||
| Structure | |||
| cubic | |||
| Thermochemistry | |||
Std molar
entropy (S |
130.5 J/mol K | ||
Std enthalpy of
formation (ΔfH⦵298) |
-342.5 kJ/mol | ||
Gibbs free energy (ΔfG˚)
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-252.6 kJ/mol | ||
| Hazards | |||
| Main hazards | Oxidizing agent | ||
| Safety data sheet | ICSC 0196 | ||
| GHS pictograms |   
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| GHS Signal word | Danger | ||
| H271, H272, H302, H315, H319, H335, H341, H350 | |||
| P201, P202, P210, P220, P221, P261, P264, P270, P271, P280, P281, P283, P301+312, P302+352, P304+340, P305+351+338, P306+360, P308+313, P312, P321, P330, P332+313, P337+313, P362, P370+378 | |||
| NFPA 704 (fire diamond) | |||
| Flash point | 381 °C (718 °F; 654 K) | ||
| Related compounds | |||
Other anions
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Sodium chlorate Sodium iodate | ||
Other cations
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Potassium bromate Calcium bromate | ||
Related compounds
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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). | |||
 verify (what is   ?)
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| 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
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 Na2CO3 → 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
- ↑ "Br2 + Na2CO3 = NaBr + NaBrO3 + CO2 | Chemical reaction and equation". 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. http://www.inchem.org/documents/iarc/vol73/73-17.html. 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. PMID 2269236.
- ↑ "Coke recalls controversial water". BBC News. 2004-03-19. http://news.bbc.co.uk/1/hi/business/3550063.stm. Retrieved 2008-03-09.
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