Buy industrial strength polyethylene Phosphoric Acid tanks for sale at the lowest prices online. Phosphoric Acid, also known as orthophosphoric acid and H3PO4, is commonly used in agriculture for crop performance chemicals like fertilizer, the cleaning industry for detergents and soaps, and the food industry as food and beverage additives. Solution strengths often range up to 85% H3PO4. For Phosphoric Acid bulk storage applications, we recommended HDPE / XLPE chemical vertical tanks.