Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| 1 % | A | A | |
| 30 % | – | – | |
| 45 % | – | – | |
| 50 % | A | A | |
| 60 % | – | – | |
| concentrated | – | – |
Material comparison at 20 °C
Resistance overview
ECTFE/ETFE shows excellent resistance to Sodium Hydroxide (Caustic Soda) across all 2 tested concentrations (1 %, 50 %) at 20 °C, making it a reliable choice for storage, transfer, and handling applications involving this chemical at any of the tested strengths. 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 Hydroxide (Caustic Soda) is commonly encountered in textile processing and water treatment. ECTFE/ETFE (Ethylene chlorotrifluoroethylene / ethylene tetrafluoroethylene) is a fluoropolymer typically used for seals, gaskets, valve seats and lined equipment. Because Sodium Hydroxide (Caustic Soda) is classified as corrosive, the choice of containment material is especially critical to prevent leaks, equipment damage, and safety hazards.
Practical recommendation
No resistance data is available for ECTFE/ETFE in contact with Sodium Hydroxide (Caustic Soda). Before using this combination, consult the material manufacturer or conduct independent testing.
Did you know?
Ethylene chlorotrifluoroethylene / ethylene tetrafluoroethylene was first developed in the 1970s and remains one of the most widely used fluoropolymers in chemical handling equipment.
Materials rated A or B at 20 °C
Based on the row for 60 %, 20 °C.
- Thermoplastics
- HDPE A, PP A, LDPE A, Nylon (PA) A, Polystyrene A, Polysulfone A, PMP A
- Fluoropolymers
- PTFE A
- Elastomers
- EPDM A, NBR B
- Metals
- SS 316 A, SS 304 A
About ECTFE/ETFE
ECTFE and ETFE are tough fluoropolymers with broad resistance. Hot amines and some chlorinated solvents at elevated temperature are their main limits.
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.