Hydrofluorosilicic Acid, also known as FSA or HFS, is a transparent, colorless, aqueous solution that is used in a variety of applications. One of its most common uses is in the fluoridation of water. FSA is produced during the concentration of phosphoric acid in an evaporation process unique to the phosphate industry.
Polypropylene is the most economical tank material for Hydrofluosilicic Acid (100%), rated Excellent. PVDF (Kynar®) is also rated Good or better. Avoid nylon tanks; 316 stainless steel and aluminum hardware. Rated Fair (contact us before use): HDPE tanks and HDPE fittings.
How Hydrofluosilicic Acid (100%) works with the plastics used to make our storage tanks.
| Material | Relative cost | Rating |
|---|---|---|
| HDPE $ | $$$$ | C Fair |
| Polypropylene $$ | $$$$ | A Excellent |
| Nylon $$$ | $$$$ | D Not Recommended |
| PVDF (Kynar®) $$$$ | $$$$ | A Excellent |
How Hydrofluosilicic Acid (100%) works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | C Fair |
| PVC | B Good |
| CPVC | — No Data |
| Polypropylene | A Excellent |
| PVDF | A Excellent |
How Hydrofluosilicic Acid (100%) works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | B Good |
| EPDM | A Excellent |
| Viton® | A Excellent |
How Hydrofluosilicic Acid (100%) works with the metals used for fittings and bolts.
| Material | Rating |
|---|---|
| 316 Stainless Steel | D Not Recommended |
| Hastelloy | B Good |
| Titanium | — No Data |
| Aluminum | D Not Recommended |
Storing this chemical in polypropylene?
Polypropylene tanks from 25 to 6,000 gallons with polypropylene fittings installed. Confirm concentration and temperature with us before you order.
Send the chemical, concentration, temperature and size. We’ll match the tank and fittings and send a quote.