Barium perchlorate

Structural formula
General
Surname	Barium perchlorate
Molecular formula	Ba (ClO 4 ) 2 Ba (ClO 4 ) 2 • 3H 2 O
Brief description	colorless crystals
External identifiers / databases
CAS number 13465-95-7 10294-39-0 (trihydrate) EC number 236-710-4 ECHA InfoCard 100.033.359 PubChem 61623 ChemSpider 55531 Wikidata Q361627
properties
Molar mass	336.24 g mol −1
Physical state	firmly
density	2.74 g cm −3
Melting point	505 ° C
boiling point	Decomposition> 700 ° C
solubility	very good in water (1980 g l −1 ) soluble in ethanol
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 271-302 + 332 P: 210-221
MAK	0.5 mg m −3 (based on Ba)
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Barium perchlorate is a chemical compound of the elements chlorine , oxygen and barium with the formula Ba (ClO ₄ ) ₂  · 3 H ₂ O. It is the barium salt of perchloric acid .

presentation

Barium perchlorate can be obtained from barium hydroxide and perchloric acid by a salt formation reaction .

${\displaystyle \mathrm {Ba(OH)_{2}+2\ HClO_{4}\longrightarrow Ba(ClO_{4})_{2}+2\ H_{2}O} }$

It can also be produced by annealing barium chlorate , which also produces barium chloride in a disproportionation reaction .

${\displaystyle \mathrm {4\ Ba(ClO_{3})_{2}\longrightarrow 3\ Ba(ClO_{4})_{2}+BaCl_{2}} }$

properties

It crystallizes as a colorless trihydrate in the hexagonal crystal system , the crystals are isomorphic to lithium perchlorate . When standing over concentrated sulfuric acid, 2 mol of water of crystallization are easily given off at room temperature , but the anhydrate does not form until around 100 ° C. It melts at 505 ° C, but at 460 ° C it begins to decompose into barium chloride and oxygen.

${\displaystyle \mathrm {Ba(ClO_{4})_{2}\longrightarrow BaCl_{2}+4\ O_{2}\uparrow } }$

Dangerousness

Barium perchlorate is toxic to the human body and can explode if it comes into contact with organic substances .

use

It is used as an oxidizing agent , for gas drying , for ribonuclease determination and in water analysis for sulfate titration with thorin as an indicator .

Individual evidence

1. ↑ ^{a b c} Entry on barium perchlorate. In: Römpp Online . Georg Thieme Verlag, accessed on June 6, 2014.
2. ↑ ^{a b c d e} Data sheet barium perchlorate anhydrous (PDF) from Merck , accessed on January 19, 2011.
3. ↑ ^{a b} Entry on barium perchlorate in the GESTIS substance database of the IFA , accessed on February 8, 2017(JavaScript required) .
4. ↑ Entry on Barium perchlorate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
5. ↑ ^{a b c d} R. Abegg, F. Auerbach: "Handbook of inorganic chemistry". Verlag S. Hirzel, Vol. 2, 1908. P. 269. Full text