Barium Nitrate GRANULAR [Ba(NO3)2] white fine powder. custom milled 325 mesh Most commonly used oxidizer in producing green colors; as an oxidizer in flash powders. PLEASE NOTE THAT ALL CHEMICALS ARE SHIPPED IN A HEAVY DUTY PLASTIC BAG INSIDE A RE-USUABLE MICROWAVABLE PLASTIC TUB AND AN ADDITONAL PLASTIC OUTER WRAP. THIS EXTRA STEP THAT WE DO COSTS MORE, BUT INSURES THAT YOUR ITEM ARRIVES INTACT. ALSO THE CONTAINER KEEPS YOUR PRODUCT FRESH.