The base material is used in oral medication applications

Calcium carbonate. The density for a calcium carbonate suspension in water is right on the money for what they’ve stated. They’re being so evasive because they haven’t patened it and likely can’t. They’re treating it like a trade secret because they can’t make it into IP.

Edit: yep, they use it in oil drilling, so they can’t patent it https://glossary.slb.com/en/terms/c/calcium_carbonate