I ordered a sample a while back but only got around to test it right now. I only have Marquis, Liebermann and Froehde so ketamine and mephedrone are really similar on the tests. No change, yellow vs bright yellow, very faint pink/brown vs no change respectively. I can't see any change on Froehde so it leads me to believe it's mephedrone.
Has anyone else tested it?
Try snorting some, it's definitely ketamine.