Compatibility Rating
Why is PP resistant to Propionic Acid?
PP shows excellent resistance to Propionic Acid due to its semi-crystalline structure providing good chemical resistance to acids, bases, and organic solvents at moderate concentrations.
⚠️ When NOT to use PP
Avoid using Polypropylene with concentrated oxidizing acids, chlorinated solvents, and aromatic hydrocarbons. Becomes brittle below 0°C.
Comparison Table — All Materials for Propionic Acid
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | C |
| LDPE | A | C |
| PP | A | A |
| PTFE | A | A |
| PVDF | A | A |
| FEP | A | A |
| ECTFE/ETFE | NR | NR |
| EPDM | C | NR |
| Viton (FPM) | A | A |
| NBR | D | D |
| Silicone | NR | NR |
| SS 316 | A | A |
| SS 304 | A | A |
| Aluminium | A | A |
| PVC Rigid | A | C |
| PVC Flexible | C | C |
| PMP | NR | NR |
| Polystyrene | D | D |
| SAN | NR | NR |
| Polycarbonate | D | D |
| PETG | NR | NR |
| Acetal (POM) | D | D |
| Nylon (PA) | C | C |
| Polysulfone | D | D |
A=Excellent · B=Good · C=Fair · D=Poor · NR=No Data
🌡️ Temperature Note
Good resistance at both 20°C and 50°C. Maximum service temperature for this material is 100°C — above this, degradation risk increases significantly.
🔄 Better Alternative?
Consider: PVDF or PTFE for higher temperatures. View all materials for Propionic Acid →
FAQ
Is Polypropylene (PP) resistant to Propionic Acid?
Polypropylene (PP) has Excellent (A) resistance to Propionic Acid at 20°C. Excellent resistance - recommended for continuous use.
Can I store Propionic Acid in Polypropylene (PP) containers?
Yes, Polypropylene (PP) is rated A (Excellent) for Propionic Acid.