I got my order from Photog's Formulary today. Two items had a surprising appearance... The benzotriazole wasn't a powder but looked like spun fibreglass - long white strands..is that normal? The KBr (potassium bromide) was in rocky chunks...I guess if one makes a huge bottle of it, a rock can be weighed & the water volume selected accordingly. I wanted to make a small volume but didn't realize I needed a mortar & pestle. I have a spice/coffee grinder I plan to use to pulverize acetaminophen...I guess I could do that to have some control over how much chemical. Don't want airborne dust however... Welcome to DIY, huh?