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Chemical Compatibility: NR (Natural Rubber)
Freon, 21 to Freon, 402a
Chemical compatibility ratings for elastomers and engineering materials exposed to various chemicals — resistance grades from A (excellent) to D (not recommended), plus X (insufficient data)
| material | chemical | parker compound code | rating | rating code |
|---|---|---|---|---|
| NR (Natural Rubber) | Freon, 21 | Factory | D-Not Recommended | D |
| NR (Natural Rubber) | Freon, 218 | N0674-70 | X-Insufficient Data | X |
| NR (Natural Rubber) | Freon, 22 (Chlorodifluoromethane) | C0873-70 | A-Excellent | A |
| NR (Natural Rubber) | Freon, 22 and ASTM Oil #2 (50/50 Mixture) | C0873-70 | D-Not Recommended | D |
| NR (Natural Rubber) | Freon, 23 (Fluoroform) (Trifluoromethane) | Factory | X-Insufficient Data | X |
| NR (Natural Rubber) | Freon, 31 | C0873-70 | B-Good | B |
| NR (Natural Rubber) | Freon, 32 | C0873-70 | A-Excellent | A |
| NR (Natural Rubber) | Freon, 356mcf | C0873-70 | X-Insufficient Data | X |
| NR (Natural Rubber) | Freon, 401a | C0873-70 | X-Insufficient Data | X |
| NR (Natural Rubber) | Freon, 402a | C0873-70 | X-Insufficient Data | X |
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