Strontium bromate

Strontium bromate IUPAC name Strontium bromate Other names Strontium bromate(V) Identifiers InChI InChI=1/2BrHO3.Sr/c2*2-1(3)4;/h2*(H,2,3,4);/q;;+2/p-2 InChIKey NAMOWWYAIVZKKA-NUQVWONBAG Standard InChI InChI=1S/2BrHO3.Sr/c2*2-1(3)4;/h2*(H,2,3,4);/q;;+2/p-2 Standard InChIKey NAMOWWYAIVZKKA-UHFFFAOYSA-L CAS number [14519-18-7] EC number 238-531-7 ChemSpider 7995221 Properties Chemical formula Sr(BrO3)2 Molar mass 343.42 g mol−1 Appearance white solid Melting point 240 °C decomp. Related compounds Other anions Strontium chlorate Strontium iodate Other cations Calcium bromate Barium bromate Other compounds Strontium bromide Strontium hypobromite Strontium bromite Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Strontium bromate monohydrate IUPAC name Strontium bromate — water (1/1) Identifiers Standard InChI InChI=1S/2BrHO3.H2O.Sr/c2*2-1(3)4;;/h2*(H,2,3,4);1H2;/q;;;+2/p-2 Standard InChIKey HTPGECLTFKGGSV-UHFFFAOYSA-L EC number 238-531-7 Properties Chemical formula Sr(BrO3)2·H2O Molar mass 361.44 g mol−1 Appearance white crystalline solid Density 3.773 g cm−3 Melting point 120 °C dehydr. Solubility in water 33 g/100 g (16 °C) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Strontium bromate, Sr(BrO₃)₂, is the strontium salt of bromic acid.

Preparation

Strontium bromate is usually prepared by the electrolysis of strontium bromide solution at 65–70 °C, in the presence of dichromate and using anodes of lead dioxide or iron and cathodes of stainless steel or copper. The strontium bromate can be crystallized by cooling the electrolyte, and any unoxidized bromide recycled.

Strontium bromate can also be prepared by reacting bromine with strontium hydroxide solution at 50–90 °C.

3 Br₂ + 3 OH⁻ ⇌ BrO−3 + 5 Br⁻ + 3 H⁺