No, Solenite has nothing to do with Cordite, it is a pure nitrocellulose powder with nigh unlimited shelflife, one of the best military propellants ever. However, and sadly, the shelflife of Italian military primers *is* a problem.
You may have had its predecessor in mind, namely Ballistite (which was used only up to 1895 in the 6,5x52 Carcano, and from 1938-1940 in the 7,35x51 Carcano, plus in blanks for either cartridge). This one is quite comparable to Chopped Cordite.

Regards,
Carcano