Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| 10 % | B | – | |
| any concentration | C* | – |
* estimated rating, given in the source without a temperature
Material comparison at 20 °C
Resistance overview
The resistance of Acetal (POM) to Sodium Bisulfate is concentration-dependent. Across the 2 tested concentrations (10 %, any concentration), the 20 °C rating ranges from B at lower concentrations to C at higher ones. This means engineers must verify which concentration their process actually involves before relying on a single rating. The rating remains stable between 20 °C and 50 °C, which means this material can also handle moderately elevated process temperatures without additional risk.
Application context
Sodium Bisulfate is commonly encountered in food processing and chemical storage. Acetal (POM) (Polyoxymethylene (acetal)) is a thermoplastic typically used for tanks, piping, containers and liners. Because Sodium Bisulfate is classified as corrosive, the choice of containment material is especially critical to prevent leaks, equipment damage, and safety hazards.
Practical recommendation
Acetal (POM) is suitable for use with Sodium Bisulfate under normal conditions, but some minor effects on the material are expected over time. Periodic monitoring for swelling, softening, or weight change is recommended, especially for long-service components. For safety-critical or long-life applications, consider HDPE, LDPE, Polycarbonate instead, which are rated A for this chemical.
Did you know?
When choosing between thermoplastics for Sodium Bisulfate service, engineers consider not just the resistance rating but also factors such as permeation rate, creep resistance, and weldability.
Materials rated A or B at 20 °C
Based on the row for 10 %, 20 °C.
- Thermoplastics
- HDPE A, PP A, PVC Rigid A, LDPE A, Polycarbonate A, PETG A
- Fluoropolymers
- PTFE A, PVDF A, FEP A, ECTFE/ETFE A
- Elastomers
- EPDM A, Viton (FPM) A, NBR A
- Metals
- SS 316 A, SS 304 A, Aluminium A
About Acetal (POM)
Acetal (POM) resists many organic solvents and fuels. Strong acids and oxidising agents degrade it.
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
About this data
The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.
A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.