[bert]

.....it is the base material for fertilizer based explosives....

I think fertilizer is Ammonium nitrate.... the acronym is ANFO Ammonium Nitrate Fuel Oil.

From earlier reports, I thought the PVC pipe contained black powder or some similar off the shelf reloader explosive.

I don’t think potassium nitrate in and of itsself is expolsive.

[driftdiver]

“I don’t think potassium nitrate in and of itsself is expolsive.”

You’re right, my mistake.