At a glance
Ratings at 20 °C.
- Rated A, very good resistance
- PTFE, Viton (FPM) (2)
- Rated B, good resistance
- PVDF (1)
- Rated C, limited resistance
- PP, SS 316, SS 304, Aluminium, Acetal (POM), Polycarbonate (6)
- Rated D, not resistant
- EPDM, NBR, Nylon (PA) (3)
- No data in the source
- HDPE, PVC Rigid, LDPE, FEP, ECTFE/ETFE, Silicone, PVC Flexible, Polystyrene, Polysulfone, PETG, PMP, SAN
- Rated lower at 50 °C than at 20 °C
- SS 316 (C → D), SS 304 (C → D), Aluminium (C → D)
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 10049-04-4
- Formula
- ClO2
- Hazard symbols in the source
- E (explosive), T (toxic) (pre-GHS European symbols; check the current safety data sheet)
- Name in the source (German)
- Chlordioxid
Resistance table
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| PP | C* | – | |
| Polycarbonate | C* | – | |
| Acetal (POM) | C* | – | |
| Nylon (PA) | D | D | |
| Fluoropolymers | |||
| PTFE | A | – | |
| PVDF | B* | – | |
| Elastomers | |||
| EPDM | D | D | |
| Viton (FPM) | A | – | |
| NBR | D | D | |
| Metals | |||
| SS 316 | C | D | |
| SS 304 | C | D | |
| Aluminium | C | 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, PETG, Polysulfone, FEP, 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 Chlorine Dioxide at high concentrations?
The materials with an A rating (resistant) for Chlorine Dioxide at 20 °C are: PTFE, Viton (FPM). These can generally be used in direct contact.
Which materials should be avoided with Chlorine Dioxide?
Materials rated D (not resistant) for Chlorine Dioxide are: EPDM, NBR, Nylon (PA). These should not be used in contact with Chlorine Dioxide.
Does temperature affect chemical resistance to Chlorine Dioxide?
Yes. 3 of 6 tested materials show a worse rating at 50 °C than at 20 °C for Chlorine Dioxide. Materials affected include: SS 316, SS 304, Aluminium.
Is PTFE safe for Chlorine Dioxide?
PTFE is rated A for Chlorine Dioxide 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.