IUPAC Name: Potassium oxido(trioxo)rhenium
Synonyms: Potassium perrhenate ; Potassium perrhenate(vii) ; Perrhenic acid potassium salt ; (Beta-4)-Rhenate(ReO41-potassium ; Perrhenic acid (HReO₄), potassium salt ; Perrhenicacid(HReO₄)potassiumsalt ; Potassium perrhenate (KReO₄) ; Potassium rhenium oxide (KReO₄)
Product Categories: Metal and Ceramic Science;Potassium Salts;Salts
CAS NO: 10466-65-6
Molecular Formula: KO₄Re
Molecular Weight: 289.3
Molecular Structure:
EINECS: 233-953-8
Mol File: 10466-65-6.mol
Melting point: 550 °C(lit.)
Boiling point: 1370 °C
Density 4.887 g/mL at 25 °C(lit.)
Refractive index 1.643
Appearance: Potassium perrhenate (CAS NO.10466-65-6) is white to slightly beige powder.

 Potassium perrhenate (CAS NO.10466-65-6) is used for the preparation of pure rhenium.

Reported in EPA TSCA Inventory.

Moderately toxic by intraperitoneal route. A powerful oxidizer. May undergo hazardous reactions with flammable materials. When heated to decomposition it can emit K₂O. See also RHENIUM.
Hazard Codes O,Xi
Risk Statements 8-36/37/38
R8 :Contact with combustible material may cause fire. 
R36/37/38: Potassium perrhenate (CAS NO.10466-65-6) is irritating to eyes, respiratory system and skin.
Safety Statements 17-26-36
S17:Keep away from combustible material. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
RIDADR UN 1479 5.1/PG 2
WGK Germany 3
RTECS SE1400000
HazardClass 5.1
PackingGroup II