Bromate

Bromate

Identifiers
CAS Number	15541-45-4 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:29223 Y
ChemSpider	76658 Y
Gmelin Reference	1888
PubChem CID	84979
UN number	1450
CompTox Dashboard (EPA)	DTXSID8023923
InChI InChI=1S/BrHO3/c2-1(3)4/h(H,2,3,4)/p-1 Y Key: SXDBWCPKPHAZSM-UHFFFAOYSA-M Y
SMILES [O-] [Br+2]([O-])[O-]
Properties
Chemical formula	BrO− 3
Conjugate acid	Bromic acid
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

The bromate anion, BrO⁻
₃, is a bromine-based oxoanion. A bromate is a chemical compound that contains this ion. Examples of bromates include sodium bromate (NaBrO
₃) and potassium bromate (KBrO
₃).

Bromates are formed many different ways in municipal drinking water. The most common is the reaction of ozone and bromide:

Br⁻
+ O
₃ → BrO⁻
₃

Electrochemical processes, such as electrolysis of brine without a membrane operating to form hypochlorite, will also produce bromate when bromide ion is present in the brine solution.

Photoactivation (sunlight exposure) will encourage liquid or gaseous bromine to generate bromate in bromide-containing water.

In laboratories bromates can be synthesized by dissolving Br
₂ in a concentrated solution of potassium hydroxide (KOH). The following reactions will take place (via the intermediate creation of hypobromite):

Br
₂ + 2 OH⁻ → Br⁻
+ BrO⁻
+ H
₂O

3 BrO⁻
→ BrO⁻
₃ + 2 Br⁻