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I'm not aware of any chromium oxide anywhere close to that size (that large). It wouldn't work very well as a pigment if it was 37 microns.

I think it's still likely that it would work fine, but...

It's likely they won't know, it looks like they're selling it for lab work. Even if they don't, you can buy it anyway. The graded powder that I got looked exactly like that, and I'm not sure it's...

For the price, I'd just buy it. I haven't seen any chromium III oxide that wouldn't be suitable for how we use it. I have seen it in graded form, both 0.3 micron and 0.5 micron, but as long as it's...