Currently I am adding 1% of chitin azure (Sigma) to sodium acetate buffer but the granules do not dissolve therefore I can't uniformly distribute it to all the test samples.
I would crash granules and gently stirr and eventually warm up to 45°C and it should dissolve within several hours. If still resisting, I would vortex. Otherwise I would filter the particles, weigh them dry and replenish them. In any case I would reclaim at Sigma.