We've got the 10mg vials in stock right now, roughly 500 units or so, and purity's >99% by HPLC—that's tighter than most intermediates on the market for this kind of work, so you're not dealing with batch-to-batch variability (check lead time if you need more than 200 vials).
Most buyers go with the 10mg per vial for reconstitution studies, but our company can customize packaing if you need 5mg or 20mg—just let me know teh volume, and we'll adjust the vial fill, usually within 2-3 weeks for a custom order.

Storage is pretty straightforward: -20°C, desiccated, and it'll hold for over 2 years if you keep it sealed. One thing people don't always think about—once reconstituted in DMSO, it's stable for about 7 days at -20°C, so don't batch-prep too far ahead.

It's not suited for in vivo work unless you're running early-stage assays—this is strictly research grade, and we don't recommend it for anything beyond that. COA covers HPLC purity and residual solvents, but we don't test for endotoxins, so keep that in mind.

Bulk pricing kicks in at 50 vials or more—about 15% off the single-unit rate, and we can do 100 vials with a tighter lead time of 7-10 business days. Anyway, let me know the quantiy you're targeting, and I'll send a pro forma invoice.
Also, we usually have stock, but confirm lead time if you're ordering over 500 units—sometimes the lyophilization cycle runs 20 days or so, and we don't want to hold up your timeline.