At a glance
Based on the row for aqueous, 20 °C.
- Rated A, very good resistance
- PTFE, HDPE, PP, PVDF, PVC Rigid, EPDM, Viton (FPM), SS 316, SS 304, Aluminium, LDPE, FEP, PVC Flexible, Polystyrene (14)
- Rated B, good resistance
- none (0)
- Rated C, limited resistance
- NBR, Nylon (PA) (2)
- Rated D, not resistant
- Acetal (POM), Polycarbonate, PMP (3)
- No data in the source
- ECTFE/ETFE, Silicone, Polysulfone, PETG, SAN
Based on the row for aqueous, 20 °C.
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
No material with a rating at both temperatures changes grade between 20 °C and 50 °C.
Substance
- CAS number
- 74-90-8
- Formula
- HCN
- Hazard symbols in the source
- F+ (extremely flammable), T+ (very toxic) (pre-GHS European symbols; check the current safety data sheet)
- Flammable
- yes
- Concentrations listed
- aqueous; technical grade
- Name in the source (German)
- Blausäure
Rating by concentration
Show as a table
| Material | aqueous | technical grade |
|---|---|---|
| Thermoplastics | ||
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PVC Rigid | A | A |
| PVC Flexible | A | A |
| PMP | D* | – |
| Polystyrene | A | A |
| SAN | – | – |
| Polycarbonate | D | D |
| PETG | – | – |
| Acetal (POM) | D | D |
| Nylon (PA) | C* | C* |
| Polysulfone | – | – |
| Fluoropolymers | ||
| PTFE | A | A |
| FEP | A | A |
| PVDF | A | A |
| ECTFE/ETFE | – | – |
| Elastomers | ||
| EPDM | A | A |
| Viton (FPM) | A | A |
| NBR | C | C |
| Silicone | – | – |
| Metals | ||
| SS 316 | A | A |
| SS 304 | A | A |
| Aluminium | A* | A |
* estimated rating, given in the source without a temperature
Resistance table: Hydrocyanic Acid (Hydrogen Cyanide), aqueous
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | A | |
| LDPE | A | A | |
| PP | A | A | |
| PVC Rigid | A | – | |
| PVC Flexible | A | – | |
| PMP | D* | – | |
| Polystyrene | A | – | |
| Polycarbonate | D | D | |
| Acetal (POM) | D | D | |
| Nylon (PA) | C* | – | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | – | |
| NBR | C | – | |
| Metals | |||
| SS 316 | A | – | |
| SS 304 | A | – | |
| Aluminium | A* | – | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: SAN, PETG, Polysulfone, ECTFE/ETFE, Silicone
Resistance table: Hydrocyanic Acid (Hydrogen Cyanide), technical grade
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | A | |
| LDPE | A | A | |
| PP | A | A | |
| PVC Rigid | A | C | |
| PVC Flexible | A | – | |
| Polystyrene | A | – | |
| Polycarbonate | D | D | |
| Acetal (POM) | D | D | |
| Nylon (PA) | C* | – | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | – | |
| NBR | C | – | |
| Metals | |||
| SS 316 | A | – | |
| SS 304 | A | – | |
| Aluminium | A | A | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: PMP, SAN, PETG, Polysulfone, 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.
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.