Compatibility Rating
At 20°C
Excellent
Excellent resistance - recommended for continuous use
At 50°C
Excellent
Excellent resistance - recommended for continuous use
Why is PTFE resistant to Calcium Hydroxide?
PTFE shows excellent resistance to Calcium Hydroxide due to the extremely strong carbon-fluorine bonds making it virtually inert to almost all chemicals.
⚠️ When NOT to use PTFE
Avoid using PTFE (Teflon) with molten alkali metals, fluorine gas at high temperatures, and certain fluorinated compounds. It is the most chemically resistant plastic available.
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 260°C — above this, degradation risk increases significantly.
🔄 Better Alternative?
Consider: None — PTFE is the gold standard. View all materials for Calcium Hydroxide →
FAQ
Is PTFE resistant to Calcium Hydroxide?
PTFE has Excellent (A) resistance to Calcium Hydroxide at 20°C.
Can I store Calcium Hydroxide in PTFE?
Yes, PTFE is rated A for Calcium Hydroxide.