Potassium perrhenate

Potassium perrhenate is an inorganic compound with the chemical formula KReO₄.

Potassium perrhenate

Identifiers
CAS Number	10466-65-6 Y
3D model (JSmol)	Interactive image
ChemSpider	2894851
ECHA InfoCard	100.030.854
EC Number	233-953-8
PubChem CID	3661560
InChI InChI=1S/K.4O.Re/q+1;;;;-1; Key: QFKRWIFGDGKWLM-UHFFFAOYSA-N
SMILES [K+].[O-][Re](=O)(=O)=O
Properties
Chemical formula	KO4Re
Molar mass	289.301 g·mol−1
Appearance	white solid[1]
Density	5.39 g·cm−3[1]
Melting point	555[2] °C (1,031 °F; 828 K)
Boiling point	1,370[2] °C (2,500 °F; 1,640 K)
Solubility in water	11.9 g·l−1[3]
Refractive index (nD)	1.643 (20 °C)[4]
Hazards
GHS labelling:[5]
Pictograms
Signal word	Warning
Hazard statements	H272, H315, H319, H335
Precautionary statements	P210, P220, P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Potassium perrhenate can be produced by the neutralization of potassium hydroxide and perrhenic acid.^[2]

${\displaystyle \mathrm {KOH+HReO_{4}\longrightarrow KReO_{4}+H_{2}O} }$

Properties

Potassium perrhenate is a white solid that is sparingly soluble in water and ethanol. It have a tetragonal crystal system with the space group I4₁/a (No. 88), and lattice constants a = 567.4 pm and c = 1266.8 pm.^[2] It is a strong oxidizer.^[4]