HYDROFLUOSILICIC ACID (20%) Chemical Compatibility

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.

At a glance

Polypropylene is the most economical tank material for Hydrofluosilicic Acid (20%), rated Excellent. PVDF (Kynar®) and HDPE are also rated Good or better.

  • Excellent No or minor effect. Recommended.
  • Good Slight effect. Generally suitable.
  • Fair Moderate effect. Limited or conditional use — contact us.
  • Not Recommended Severe effect. Do not use.
  • No Data Not tested. Contact us before use.

Tank Resins

How Hydrofluosilicic Acid (20%) works with the plastics used to make our storage tanks.

Material Rating
HDPE Good
Polypropylene Excellent
Nylon No Data SEVERE EFFECT
PVDF (Kynar®) Excellent

Fittings

How Hydrofluosilicic Acid (20%) works with the plastics used for tank fittings.

Material Rating
HDPE Good
PVC Excellent
CPVC Excellent
Polypropylene Excellent
PVDF Excellent

Gaskets & O-Rings

How Hydrofluosilicic Acid (20%) works with gasket and O-ring materials.

Material Rating
Buna-N Excellent
EPDM Excellent
Viton® Excellent

Metals

How Hydrofluosilicic Acid (20%) works with the metals used for fittings and bolts.

Material Rating
316 Stainless Steel Good
Hastelloy Good
Titanium No Data
Aluminum No Data SEVERE EFFECT