Is it safe to use the Phosphoric Acid Barrels from a large soda bottler to make a composter?
These are barrels I got when I requested Soda Syrup Barrels, directly from the bottling plant. They still contain a small amount of liquid. The barrels are white and have a label that says CRI-1020787, Corrosive, 8, Phosphoric Acid Solution, UN 1805, along with a bar code. There is no mention of percentage on the label. I assume they are food grade. I need to know if they are safe to use to make a composter. Please let me know, what you know.