You're working with a coenzyme that drops off fast in aging cells, and that's what makes these energy metabolism studies tricky to replicate without consistent materail.
We've got it as a, ≥99% by HPLC, and teh 663.43 g/mol molecular weight means it dissolves cleanly in water for your assays—most buyers go with the 100mg or 250mg vials, but our company can customize packging on bulk orders (usually 2-4 weeks lead time).

It's soluble in water, stores at 2-8°C protected from light, and the 24-month shelf life holds up if you keep it dry; is that once reconstituted, it degrades faster than the powder form.

Also, it's not suited for anything beyond research—no human or animal use, and we include the COA with each batch so you can verify the HPLC purity yourself.

For bulk pricing, we work off MOQ of 10 grams or so, and what people typically ask is whether our company have stock ready—we usually do, but confirm lead time for anything over 50 grams.
The ISO 9001 certification covers production, but what it doesn't tell you is that lyophilization process leaves it fluffy, not caked, so it weighs out consistent every time.