At a glance
Based on the row for saturated, 20 °C.
- Rated A, very good resistance
- PTFE, HDPE, PP, PVDF, PVC Rigid, EPDM, SS 316, SS 304, Aluminium, LDPE, FEP, Acetal (POM), Polystyrene, PETG, SAN (15)
- Rated B, good resistance
- Viton (FPM) (1)
- Rated C, limited resistance
- Nylon (PA), Polycarbonate (2)
- Rated D, not resistant
- NBR (1)
- No data in the source
- ECTFE/ETFE, Silicone, PVC Flexible, Polysulfone, PMP
- Rated lower at 50 °C than at 20 °C
- PVC Rigid (A → D), Viton (FPM) (B → C)
Based on the row for saturated, 20 °C.
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 88-99-3
- Formula
- C8H6O4
- Hazard symbols in the source
- Xi (irritant) (pre-GHS European symbols; check the current safety data sheet)
- Concentrations listed
- saturated
- Also listed as
- Benzene-1,2-dicarboxylic acid
- Name in the source (German)
- Phthalsäure
Resistance table: Phthalic Acid, saturated
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | A | |
| LDPE | A | A | |
| PP | A | A | |
| PVC Rigid | A | D | |
| Polystyrene | A | – | |
| SAN | A | A | |
| Polycarbonate | C* | – | |
| PETG | A | – | |
| Acetal (POM) | A | – | |
| Nylon (PA) | C | C | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | B | C | |
| NBR | D | D | |
| Metals | |||
| SS 316 | A | A | |
| SS 304 | A | A | |
| Aluminium | A | A | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: PVC Flexible, PMP, 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.
Frequently Asked Questions
Which materials resist Phthalic Acid at high concentrations?
The materials with an A rating (resistant) for Phthalic Acid at 20 °C are: PTFE, HDPE, PP, PVDF, PVC Rigid, EPDM, SS 316, SS 304. These can generally be used in direct contact.
Which materials should be avoided with Phthalic Acid?
Materials rated D (not resistant) for Phthalic Acid are: NBR. These should not be used in contact with Phthalic Acid.
Does temperature affect chemical resistance to Phthalic Acid?
Yes. 2 of 14 tested materials show a worse rating at 50 °C than at 20 °C for Phthalic Acid. Materials affected include: PVC Rigid, Viton (FPM).
Is PTFE safe for Phthalic Acid?
PTFE is rated A for Phthalic Acid 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.