| CHROMAFIL® CA |
| Syringe filters with membrane of cellulose acetate |
| Sterile and nonsterile packages available |
| Features |
| – Hydrophilic membrane For filtration of water-soluble oligomers and polymers, especially suited for biological macromolecules Very high shape stability in aqueous solutions Extremely low binding capacity for proteins (21 µg per 25 mm filter) |
| – Also available in a sterile package (S) for filtration under sterile conditions (each filter individually sealed) |
| Ordering information · CHROMAFIL® Xtra Cellulose acetate 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 | ||
| CA-20/25 | 0.2 | 25 | labeled | 100 | 729226 | 400 | 729226 |
| CA-45/25 | 0.45 | 25 | labeled | 100 | 729227 | 400 | 729227 |
| Ordering information · CHROMAFIL® Color-coded cellulose acetate syringe filters |
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| Type | Pore size | Membrane | Color code | Standard pack | BIG-BOX | |||
| [µm] | dia. [mm] | top | bottom | Filters/pack | REF | Filters/pack | REF | |
| CA-20/15 MS | 0.2 | 15 | yellow | red | 100 | 729054 | 800 | 729055 |
| CA-45/15 MS | 0.45 | 15 | colorless | red | 100 | 729055 | 800 | 729056 |
| CA-20/25 | 0.2 | 25 | yellow | red | 100 | 729026 | 400 | 729026 |
| CA-45/25 | 0.45 | 25 | colorless | red | 100 | 729027 | 400 | 729027 |
| Sterile filters | ||||||||
| CA-20/15 MS (S) | 0.2 | 15 | yellow | red | 50 | 729052 | ||
| CA-45/15 MS (S) | 0.45 | 15 | colorless | red | 50 | 729053 | ||
| CA-20/25 (S) | 0.2 | 25 | yellow | red | 50 | 729024 | ||
| CA-45/25 (S) | 0.45 | 25 | colorless | red | 50 | 729025 | ||
| MS = minispike on filter exit, S = sterile filter | ||||||||
| 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 | – | ||||||||||
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