| CHROMAFIL® H-PTFE |
| Syringe filters with hydrophilized polytetrafluoroethylene membrane |
| Features |
| – Hydrophobic membrane with additional hydrophilic characteristic |
| – For polar and nonpolar solutions |
| – Resistant towards all kinds of solvents as well as acids and bases |
| Ordering information · CHROMAFIL® Xtra Hydrophilized polytetrafluoroethylene syringe filters labeled for method validation and certification |
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| Type | Pore size | Membrane | Standard pack | BIG-BOX | |||
| [µm] | dia. [mm] | Filters/pack | REF | Filters/pack | REF | ||
| H-PTFE-20/25 | 0.2 | 25 | labeled | 100 | 729245 | 400 | 729245 |
| H-PTFE-45/25 | 0.45 | 25 | labeled | 100 | 729246 | 400 | 729246 |
| CHROMAFIL® filter membranes | |
| Chemical compatibility of filter materials | |
| The following table lists the chemical compatibility of our CHROMAFIL® materials. The chemical compatibility depends on several parameters such as time, pressure, temperature and concentration. In most cases, CHROMAFIL® filters will have only short contact with a solvent. | In these cases they may be used despite of limited compatibility. For example, a PTFE filter with PP housing does not liberate any UV-detectable substances during filtration of 5 mL THF, although PP shows only limited resistance towards THF. |
| Solvent | Material | ||||||||||
| MV | CA | RC | PA | PTFE | H-PTFE | PVDF | PES | PET | GF | PP | |
| Acetaldehyde | – | – | o | o | |||||||
| Acetic acid, 100 % | – | – | – | – | |||||||
| Acetone | – | – | – | – | |||||||
| Acetonitrile | – | – | |||||||||
| Ammonia, 25 % | – | – | o | – | o | ||||||
| Benzene | o | o | |||||||||
| n-Butanol | o | ||||||||||
| Cyclohexane | o | ||||||||||
| Dichloromethane | – | – | – | – | |||||||
| Diethyl ether | o | o | o | ||||||||
| Dimethylformamide | – | – | o | – | – | ||||||
| 1,4-Dioxane | – | – | o | – | o | ||||||
| Ethanol | – | ||||||||||
| Ethyl acetate | – | – | o | ||||||||
| Ethylene glycol | o | o | |||||||||
| Formic acid, 100 % | – | o | – | o | |||||||
| Hydrochloric acid, 30 % | – | – | – | – | – | ||||||
| Methanol | – | – | |||||||||
| Nitric acid, 65 % | – | – | – | – | o | o | o | o | – | ||
| Oxalic acid, 10 % aqueous | – | – | |||||||||
| Petroleum ether | |||||||||||
| Phosphoric acid, 80 % | – | – | o | – | o | ||||||
| Potassium hydroxyde, 1 mol/L | – | – | o | o | o | ||||||
| 2-Propanol | |||||||||||
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