Compatibility Rating
At 20°C (68°F)
Excellent
Excellent resistance - recommended for continuous use
At 50°C (122°F)
Excellent
Excellent resistance - recommended for continuous use
Why is PTFE resistant to Potassium Iodide?
PTFE shows excellent resistance to Potassium Iodide 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 Potassium Iodide
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PTFE | A | A |
| PVDF | A | A |
| FEP | A | A |
| ECTFE/ETFE | A | A |
| EPDM | A | NR |
| Viton (FPM) | A | A |
| NBR | A | C |
| Silicone | NR | NR |
| SS 316 | A | NR |
| SS 304 | A | NR |
| Aluminium | A | A |
| PVC Rigid | A | A |
| PVC Flexible | A | NR |
| PMP | NR | NR |
| Polystyrene | A | A |
| SAN | A | A |
| Polycarbonate | B | B |
| PETG | B | B |
| Acetal (POM) | A | A |
| Nylon (PA) | A | NR |
| Polysulfone | A | NR |
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 Potassium Iodide →
FAQ
Is PTFE resistant to Potassium Iodide?
PTFE has Excellent (A) resistance to Potassium Iodide at 20°C. Excellent resistance - recommended for continuous use.