At a glance
Based on the row for anhydrous, 20 °C.
- Rated A, very good resistance
- PTFE, FEP (2)
- Rated B, good resistance
- PP (1)
- Rated C, limited resistance
- EPDM, Viton (FPM), SS 316, SS 304 (4)
- Rated D, not resistant
- NBR, Aluminium, Nylon (PA), Acetal (POM), Polycarbonate, Polysulfone, PETG (7)
- No data in the source
- HDPE, PVDF, PVC Rigid, LDPE, ECTFE/ETFE, Silicone, PVC Flexible, Polystyrene, PMP, SAN
- Rated lower at 50 °C than at 20 °C
- EPDM (C → D)
Based on the row for anhydrous, 20 °C.
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 7664-39-3
- Formula
- HF
- Hazard symbols in the source
- T+ (very toxic), C (corrosive) (pre-GHS European symbols; check the current safety data sheet)
- Concentrations listed
- anhydrous
- Also listed as
- Hydrofluoric acid, anhydrous
- Name in the source (German)
- Fluorwasserstoff
Resistance table: Hydrogen Fluoride, anhydrous
Remark: Flusssäure, wasserfrei
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| PP | B* | – | |
| Polycarbonate | D | D | |
| PETG | D | D | |
| Acetal (POM) | D | D | |
| Nylon (PA) | D | D | |
| Polysulfone | D | D | |
| Fluoropolymers | |||
| PTFE | A | – | |
| FEP | A* | – | |
| Elastomers | |||
| EPDM | C | D | |
| Viton (FPM) | C* | – | |
| NBR | D | D | |
| Metals | |||
| SS 316 | C* | – | |
| SS 304 | C* | – | |
| Aluminium | D | D | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: HDPE, LDPE, PVC Rigid, PVC Flexible, PMP, Polystyrene, SAN, PVDF, ECTFE/ETFE, Silicone
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.
Frequently Asked Questions
Which materials resist Hydrogen Fluoride at high concentrations?
The materials with an A rating (resistant) for Hydrogen Fluoride at 20 °C are: PTFE, FEP. These can generally be used in direct contact.
Which materials should be avoided with Hydrogen Fluoride?
Materials rated D (not resistant) for Hydrogen Fluoride are: NBR, Aluminium, Nylon (PA), Acetal (POM), Polycarbonate, Polysulfone, PETG. These should not be used in contact with Hydrogen Fluoride.
Does temperature affect chemical resistance to Hydrogen Fluoride?
Yes. 1 of 8 tested materials show a worse rating at 50 °C than at 20 °C for Hydrogen Fluoride. Materials affected include: EPDM.
Is PTFE safe for Hydrogen Fluoride?
PTFE is rated A for Hydrogen Fluoride at 20 °C. A rating of A means resistant, B means limited resistance, C means partly resistant, and D means not resistant.
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.
Chemicals with a similar resistance profile
Same 20 °C rating on the share of materials shown.