Appearance
Black-red crystalline powder

Metal content
38.0% - 41.0 % ruthenium

Insolubles
0.1 % maximum

Impurities
All figures as detected by spectrographic emission with respect to ruthenium.

Precious metals
Pt, Ir, Rh, Pd, Os, Au, Ag
Total - 2500 ppm maximum
Individual - 1000 ppm maximum each

Base metals
Sodium - 1000 ppm maximum
Iron - 1000 ppm maximum

Other base metals
Total - 3500 ppm maximum
Individual - 1000 ppm maximum each