Barium Sulfate [BaSO4] Technical grade, very fine white powder. Used as a green color agent, a high temperature oxidizer in strobe mixtures, sometimes as a delay agent in glitter formulations. 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.