At a glance
Ratings at 20 °C.
- Rated A, very good resistance
- PTFE, PVDF, Viton (FPM), FEP, ECTFE/ETFE (5)
- Rated B, good resistance
- SS 316, SS 304 (2)
- Rated C, limited resistance
- HDPE, PP, PVC Rigid, EPDM, PVC Flexible, SAN (6)
- Rated D, not resistant
- NBR, Aluminium, Nylon (PA), Acetal (POM), Polycarbonate, Polystyrene, PETG, PMP (8)
- No data in the source
- LDPE, Silicone, Polysulfone
- Rated lower at 50 °C than at 20 °C
- PP (C → D)
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 7782-50-5
- Formula
- Cl2 x H2O
- Hazard symbols in the source
- T (toxic) (pre-GHS European symbols; check the current safety data sheet)
- Name in the source (German)
- Chlorwasser
Resistance table
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | C | – | |
| LDPE | – | D | |
| PP | C | D | |
| PVC Rigid | C | C | |
| PVC Flexible | C | – | |
| PMP | D | D | |
| Polystyrene | D | D | |
| SAN | C | C | |
| Polycarbonate | D | D | |
| PETG | D | D | |
| Acetal (POM) | D | D | |
| Nylon (PA) | D | D | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A* | – | |
| PVDF | A | A | |
| ECTFE/ETFE | A | A | |
| Elastomers | |||
| EPDM | C | – | |
| Viton (FPM) | A | – | |
| NBR | D | D | |
| Metals | |||
| SS 316 | B | – | |
| SS 304 | B | – | |
| Aluminium | D | D | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: Polysulfone, 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 Water at high concentrations?
The materials with an A rating (resistant) for Chlorine Water at 20 °C are: PTFE, PVDF, Viton (FPM), FEP, ECTFE/ETFE. These can generally be used in direct contact.
Which materials should be avoided with Chlorine Water?
Materials rated D (not resistant) for Chlorine Water are: NBR, Aluminium, Nylon (PA), Acetal (POM), Polycarbonate, Polystyrene, PETG, PMP. These should not be used in contact with Chlorine Water.
Does temperature affect chemical resistance to Chlorine Water?
Yes. 1 of 14 tested materials show a worse rating at 50 °C than at 20 °C for Chlorine Water. Materials affected include: PP.
Is PTFE safe for Chlorine Water?
PTFE is rated A for Chlorine Water 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.