Sodium Hydroxide (80%) (NaOH, CAS 1310-73-2) at this concentration is a dense, strongly caustic material with a specific gravity near 1.9 that is solid at ambient temperature and must be kept hot to stay liquid. It is used in specialty chemical manufacturing and where adding water is undesirable. Because of the high storage temperatures and severe corrosivity, confirm the temperature limits of each tank resin before choosing a tank. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.
Safety data: Sodium Hydroxide Solution Safety Data Sheet (SDS) – Formosa Plastics USA
Polypropylene is the recommended tank material for Sodium Hydroxide (80%), rated Excellent. Avoid PVDF (Kynar®) tanks; PVDF fittings; Buna-N and Viton® gaskets. Rated Fair (contact us before use): HDPE and nylon tanks; HDPE fittings.
How Sodium Hydroxide (80%) works with the plastics used to make our storage tanks.
| Material | Rating |
|---|---|
| HDPE | |
| Polypropylene | |
| Nylon | |
| PVDF (Kynar®) |
How Sodium Hydroxide (80%) works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | |
| PVC | |
| CPVC | |
| Polypropylene | |
| PVDF |
How Sodium Hydroxide (80%) works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | |
| EPDM | |
| Viton® |
Talk to a tank specialist