At a glance
Based on the row for concentration not stated, 20 °C.
- Rated A, very good resistance
- PTFE, HDPE, PP, PVDF, PVC Rigid, EPDM, Viton (FPM), SS 316, Aluminium, LDPE, FEP, ECTFE/ETFE, Polycarbonate, PVC Flexible, Polystyrene, Polysulfone, PMP, SAN (18)
- Rated B, good resistance
- SS 304 (1)
- Rated C, limited resistance
- NBR, Nylon (PA) (2)
- Rated D, not resistant
- Acetal (POM) (1)
- No data in the source
- Silicone, PETG
- Rated lower at 50 °C than at 20 °C
- PVDF (A → C), SS 316 (A → C), SS 304 (B → C), Nylon (PA) (C → D)
- Rating changes with concentration (20 °C)
- PVDF: A (concentration not stated), B (aqueous); Nylon (PA): C (concentration not stated), D (aqueous); Polycarbonate: A (concentration not stated), B (aqueous)
Based on the row for concentration not stated, 20 °C.
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 144-62-7
- Formula
- C2H2O4 x 2H2O
- Hazard symbols in the source
- Xn (harmful) (pre-GHS European symbols; check the current safety data sheet)
- Concentrations listed
- aqueous; concentration not stated
- Also listed as
- Ethanedioic acid
- Name in the source (German)
- Oxalsäure
Rating by concentration
Show as a table
| Material | aqueous | concentration not stated |
|---|---|---|
| Thermoplastics | ||
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PVC Rigid | – | A |
| PVC Flexible | – | A |
| PMP | – | A |
| Polystyrene | – | A |
| SAN | – | A |
| Polycarbonate | B* | A |
| PETG | B* | – |
| Acetal (POM) | D | D |
| Nylon (PA) | D | C |
| Polysulfone | – | A |
| Fluoropolymers | ||
| PTFE | A | A |
| FEP | A | A |
| PVDF | B* | A |
| ECTFE/ETFE | A | A |
| Elastomers | ||
| EPDM | A | A |
| Viton (FPM) | A | A |
| NBR | C | C |
| Silicone | – | – |
| Metals | ||
| SS 316 | A | A |
| SS 304 | B | B |
| Aluminium | A | A |
* estimated rating, given in the source without a temperature
Resistance table: Oxalic Acid, aqueous
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | A | |
| LDPE | A | A | |
| PP | A | A | |
| Polycarbonate | B* | – | |
| PETG | B* | – | |
| Acetal (POM) | D | D | |
| Nylon (PA) | D | D | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | B* | – | |
| ECTFE/ETFE | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | A | |
| NBR | C | C | |
| Metals | |||
| SS 316 | A | C | |
| SS 304 | B | C | |
| Aluminium | A | – | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: PVC Rigid, PVC Flexible, PMP, Polystyrene, SAN, Polysulfone, Silicone
Resistance table: Oxalic Acid, concentration not stated
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | A | |
| LDPE | A | A | |
| PP | A | A | |
| PVC Rigid | A | A | |
| PVC Flexible | A | A | |
| PMP | A | A | |
| Polystyrene | A | A | |
| SAN | A | A | |
| Polycarbonate | A | – | |
| Acetal (POM) | D | D | |
| Nylon (PA) | C | D | |
| Polysulfone | A | – | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | A | C | |
| ECTFE/ETFE | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | A | |
| NBR | C | C | |
| Metals | |||
| SS 316 | A | C | |
| SS 304 | B | C | |
| Aluminium | A | – | |
Not rated in the source, so not in the table: PETG, 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 Oxalic Acid at high concentrations?
The materials with an A rating (resistant) for Oxalic Acid at 20 °C are: PTFE, HDPE, PP, PVDF, PVC Rigid, EPDM, Viton (FPM), SS 316. These can generally be used in direct contact.
Which materials should be avoided with Oxalic Acid?
Materials rated D (not resistant) for Oxalic Acid are: Acetal (POM). These should not be used in contact with Oxalic Acid.
Does temperature affect chemical resistance to Oxalic Acid?
Yes. 4 of 18 tested materials show a worse rating at 50 °C than at 20 °C for Oxalic Acid. Materials affected include: PVDF, SS 316, SS 304, Nylon (PA).
Is PTFE safe for Oxalic Acid?
PTFE is rated A for Oxalic Acid at 20 °C. A rating of A means resistant, B means limited resistance, C means partly resistant, and D means not resistant.
Does concentration affect chemical resistance to Oxalic Acid?
Yes. Oxalic Acid is tested at 2 concentrations (aqueous, concentration not stated). Some materials change their rating depending on the concentration.
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.