Compatibility Rating
At 20°C
Excellent
Excellent resistance - recommended for continuous use
At 50°C
Excellent
Excellent resistance - recommended for continuous use
Why is PP resistant to Calcium Hydroxide?
PP shows excellent resistance to Calcium Hydroxide 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 Calcium Hydroxide
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PTFE | A | A |
| PVDF | A | C |
| FEP | A | A |
| ECTFE/ETFE | A | A |
| EPDM | A | NR |
| Viton (FPM) | A | A |
| NBR | A | NR |
| Silicone | NR | NR |
| SS 316 | A | A |
| SS 304 | A | A |
| Aluminium | C | D |
| PVC Rigid | A | A |
| PVC Flexible | A | NR |
| PMP | A | A |
| Polystyrene | B | B |
| SAN | NR | NR |
| Polycarbonate | D | D |
| PETG | A | NR |
| Acetal (POM) | A | A |
| Nylon (PA) | A | NR |
| Polysulfone | B | B |
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 Calcium Hydroxide →
FAQ
Is Polypropylene (PP) resistant to Calcium Hydroxide?
Polypropylene (PP) has Excellent (A) resistance to Calcium Hydroxide at 20°C.
Can I store Calcium Hydroxide in Polypropylene (PP)?
Yes, Polypropylene (PP) is rated A for Calcium Hydroxide.