At a glance
Ratings at 20 °C.
- Rated A, very good resistance
- PTFE, PVDF, SS 316, SS 304, Aluminium, FEP (6)
- Rated B, good resistance
- ECTFE/ETFE (1)
- Rated C, limited resistance
- PP, Viton (FPM), Nylon (PA), Acetal (POM), PMP (5)
- Rated D, not resistant
- HDPE, PVC Rigid, EPDM, NBR, LDPE, Polycarbonate, PVC Flexible, Polystyrene, Polysulfone, PETG, SAN (11)
- No data in the source
- Silicone
- Rated lower at 50 °C than at 20 °C
- PP (C → D), PVDF (A → C), Nylon (PA) (C → D), PMP (C → D)
- Risk of pitting or stress-corrosion cracking
- SS 316, SS 304
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 75-09-2
- Formula
- CH2Cl2
- Hazard symbols in the source
- Xn (harmful) (pre-GHS European symbols; check the current safety data sheet)
- Also listed as
- Methylen(di)chloride
- Name in the source (German)
- Dichlormethan
Resistance table
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | D | D | |
| LDPE | D | D | |
| PP | C | D | |
| PVC Rigid | D | D | |
| PVC Flexible | D | D | |
| PMP | C | D | |
| Polystyrene | D | D | |
| SAN | D | D | |
| Polycarbonate | D | D | |
| PETG | D | D | |
| Acetal (POM) | C | – | |
| Nylon (PA) | C | D | |
| Polysulfone | D | D | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | A | C | |
| ECTFE/ETFE | B | B | |
| Elastomers | |||
| EPDM | D | D | |
| Viton (FPM) | C | C | |
| NBR | D | D | |
| Metals | |||
| SS 316 | A | A | pitting risk |
| SS 304 | A | A | pitting risk |
| Aluminium | A | – | disputed, see below |
Not rated in the source, so not in the table: 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.
Corrected and disputed values
- Aluminium (concentration not stated): source value 1/0 kept, but other published charts rate it lower. Two charts rate aluminium C and D for dichloromethane. [1] [2]
Source values use the scale 1 (very good) to 4 (not resistant); 1 = A, 4 = D.
Frequently Asked Questions
Which materials resist Dichloromethane at high concentrations?
The materials with an A rating (resistant) for Dichloromethane at 20 °C are: PTFE, PVDF, SS 316, SS 304, Aluminium, FEP. These can generally be used in direct contact.
Which materials should be avoided with Dichloromethane?
Materials rated D (not resistant) for Dichloromethane are: HDPE, PVC Rigid, EPDM, NBR, LDPE, Polycarbonate, PVC Flexible, Polystyrene. These should not be used in contact with Dichloromethane.
Does temperature affect chemical resistance to Dichloromethane?
Yes. 4 of 21 tested materials show a worse rating at 50 °C than at 20 °C for Dichloromethane. Materials affected include: PP, PVDF, Nylon (PA), PMP.
Is PTFE safe for Dichloromethane?
PTFE is rated A for Dichloromethane 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.