Basically, you're looking at >98% purity by HPLC across the board—better than what most bulk supliers push out for the same price point, and we've got the batch-specific COAs to prove it without you having to chase them down.
Most buyers go with the 100mg MOQ for standard sequences, but if you need a custom modification or labeling, that lead time stretches to about 3-4 weeks (usually 2-4 for the basic stuff) and we'll confirm before you commit.

It's a, water soluble, and you'll want to store it at -20°C desiccated—stability holds for 24 months or so when you do that, but it's non-sterile so don't expect it for cell culture work, that's not what it's for.
What we've found handling these is that solid-phase synthesis and preparative HPLC purification give tighter tolerances than reagent grade form some competitors—better consistency for your dose-response studies, and teh MS data backs it up on every lot.
Also, packging comes in sealed vials with desiccant, and we include the MSDS and analytical data automatically—no need to ask twice, though you'll want to double-check the molecular weight if your sequence isn't standdard, that's variable by design.