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We've been running these for a few months now and purity is consistently above 99.9%—HPLC confirmed, which is tighter than most pharmaceutical-grade stuff we've seen.
The CAS is 7732-18-5, molecular weight 18.01, and it's a white powder that stores at 2-8°C in a dry place, so basically standard fridge conditions but keep the desiccant fresh.
Each order comes as 10, and the MOQ is usually one box, but check lead time if you need more than 50 vials or so because stock varies.
What it's not suited for is any kind of formulation work with organic solvents—it's H2O, so solubility is pretty much limited to aqueous buffers, and we've had a few buyers try to push that.
Also, the 5L drum is easier to handle for larger runs, but teh 10-vial box is better for small-scale assays where you don't want to open a bulk container.
You'll get a COA with each shipment, and we usually have stock, but confirm lead time if you're ordering outside standerd business hours.
