Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| 40 % | A | A | |
| technical grade | A | A |
Material comparison at 20 °C
Resistance overview
PTFE shows excellent resistance to Acetaldehyde across all 2 tested concentrations (40 %, technical grade) 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
Acetaldehyde is commonly encountered in coatings and paints and cleaning and degreasing. PTFE (Polytetrafluoroethylene) is a fluoropolymer typically used for seals, gaskets, valve seats and lined equipment. Since Acetaldehyde is flammable, material selection must also consider the risk of static charge buildup and the need for proper grounding in storage and transfer systems.
Practical recommendation
PTFE can be used with confidence for Acetaldehyde containment and handling. The A rating indicates that the material shows no significant change in weight, dimensions, or mechanical properties after prolonged contact under test conditions. This holds true at both 20 °C and 50 °C, giving a good safety margin for typical process environments.
Did you know?
Polytetrafluoroethylene was first developed in the 1940s 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 40 %, 20 °C.
- Thermoplastics
- LDPE B, Nylon (PA) B, Acetal (POM) B, PMP B
- Fluoropolymers
- FEP A, ECTFE/ETFE B
- Metals
- SS 316 A, SS 304 A, Aluminium A
About PTFE
PTFE is resistant to almost every chemical in this list. The known exceptions are molten alkali metals, elemental fluorine and some fluorinating agents at elevated temperature.
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.