Compatibility Rating
At 20°C
Excellent
Excellent resistance - recommended for continuous use
At 50°C
Fair
Limited resistance - short-term exposure only
Why is HDPE resistant to Pyridine?
HDPE shows excellent resistance to Pyridine due to its tightly packed molecular structure and chemical inertness to most acids, bases, and salts.
⚠️ When NOT to use HDPE
Avoid using High-Density Polyethylene with strong oxidizing acids (nitric, chromic), chlorinated solvents, and aromatic hydrocarbons. Maximum service temperature is around 80°C.
Comparison Table — All Materials for Pyridine
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | C |
| LDPE | NR | NR |
| PP | C | C |
| PTFE | A | A |
| PVDF | A | C |
| FEP | B | B |
| ECTFE/ETFE | A | A |
| EPDM | D | D |
| Viton (FPM) | D | D |
| NBR | D | D |
| Silicone | NR | NR |
| SS 316 | A | A |
| SS 304 | A | A |
| Aluminium | A | A |
| PVC Rigid | D | D |
| PVC Flexible | D | D |
| PMP | NR | NR |
| Polystyrene | D | D |
| SAN | D | D |
| Polycarbonate | D | D |
| PETG | NR | NR |
| Acetal (POM) | A | A |
| Nylon (PA) | A | NR |
| Polysulfone | D | D |
A=Excellent · B=Good · C=Fair · D=Poor · NR=No Data
🌡️ Temperature Note
Performance degrades significantly at higher temperatures — rated Excellent at 20°C but only Fair at 50°C. For elevated temperatures, consider a more resistant material. Max service temp: 80°C.
🔄 Better Alternative?
Consider: PP (higher temp) or PTFE (universal). View all materials for Pyridine →
FAQ
Is HDPE resistant to Pyridine?
HDPE has Excellent (A) resistance to Pyridine at 20°C.
Can I store Pyridine in HDPE?
Yes, HDPE is rated A for Pyridine.