2C-B should be tested with Marquis reagent, where it should turn yellow and then green over a period of roughly 30 seconds.
[MDMA pictured left, 2C-B right]
Stop eyeballing your mushroom doses.
Potency varies up to 10x within a single batch. Caps hit different than stems. Fresh hits different than dry.
Powder them. Weigh them. Know your dose.