Characteristic

Ammonium perrhenate (APR) is the ammonium salt of perrhenic acid, NH₄ReO₄. It is the most common form in which rhenium is traded. It is a white, water-soluble salt.

Chemical formula:NH₄ReO₄

Molar mass:268.2359 g/mol

Density:3.97 g/cm³, solid

Solubility in water:2.8 g/100 mL (0 °C), 6.2 g/100 mL (20 °C), 12.0 g/100 mL (40 °C), 20.7 g/100 mL (60 °C), 32.3 g/100 mL (80 °C), 39.1 g/100 mL (90 °C)

Crystal structure: scheelite