At a glance

HDPE is the most economical tank material for Potassium Hydroxide 50%, rated Excellent. Polypropylene and PVDF (Kynar®) are also rated Good or better. Avoid aluminum hardware. Rated Fair (contact us before use): nylon tanks.

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 Potassium Hydroxide 50% works with the plastics used to make our storage tanks.

Material	Rating
HDPE	Excellent
Polypropylene	Excellent
Nylon	Fair
PVDF (Kynar®)	Excellent

Fittings

How Potassium Hydroxide 50% works with the plastics used for tank fittings.

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

Gaskets & O-Rings

How Potassium Hydroxide 50% works with gasket and O-ring materials.

Material	Rating
Buna-N	Good
EPDM	Excellent
Viton®	Good

Metals

How Potassium Hydroxide 50% works with the metals used for fittings and bolts.

Material	Rating
316 Stainless Steel	Excellent
Hastelloy	Good
Titanium	No Data
Aluminum	Not Recommended