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Permanent Hydrophilic PTFE Membranes – Direct Replacement for Millipore, Whatman & Advantec
| Sample Type | Recommended Pore Size | Why |
| Submicron particles, virus removal, ultracleaning | 0.1 μm | Highest retention, critical for sensitive LC-MS |
| Aqueous buffers, HPLC mobile phase, protein solutions | 0.22 μm | Removes bacteria & particulates, protects columns |
| Strong acids, organic solvents, general filtration | 0.45 μm | High flow rate, broad chemical tolerance |
| Coarse particles, prefiltration, dissolution testing | 1.0–5.0 μm | High throughput, extended filter life |
| Parameter | Specification |
| Membrane Material | Permanently hydrophilic PTFE (non-coating) |
| Pore Sizes | 0.1, 0.22, 0.45, 1.0, 5.0 μm |
| Disc Diameters | 13, 25, 47, 50, 60, 90, 142 mm |
| Wetting | Permanent, no alcohol pre-wetting required |
| Extractable Level | HPLC-grade, low extractable |
| Protein Binding | Low non-specific adsorption |
| pH Range | 1–14 |
| Max Temperature | 130°C continuous |
| Sterilization | Autoclavable, gamma irradiation |
| Compatible Brands | Millipore, Whatman, Advantec, Sartorius, Tisch, Sterlitech |
0.1 μm pore size
| SKU | Diameter | Pack Quantity |
| 11148209 | 13 mm | 400 pcs/pk |
| 11148210 | 25 mm | 200 pcs/pk |
| 11148211 | 47 mm | 100 pcs/pk |
| 11148212 | 90 mm | 50 pcs/pk |
0.22 μm pore size
| SKU | Diameter | Pack Quantity |
| 11147212 | 13 mm | 400 pcs/pk |
| 11147213 | 25 mm | 200 pcs/pk |
| 11147214 | 47 mm | 100 pcs/pk |
| 11147215 | 50 mm | 100 pcs/pk |
| 11147216 | 60 mm | 50 pcs/pk |
| 11147217 | 90 mm | 50 pcs/pk |
| 11147219 | 142 mm | 50 pcs/pk |
(0.45 μm, 1.0 μm, 5.0 μm follow the same format; membrane rolls also available.
Download PDF Datasheet
| Problem | Hawach Solution | Outcome |
| Hydrophobic PTFE needs pre-wetting | Permanent intrinsic hydrophilicity | Direct aqueous filtration, simplified workflow |
| Extractables interfere with HPLC/LC-MS | High-purity PTFE, low extractable | Stable baseline, reliable analytical results |
| Protein loss during filtration | Low protein-binding surface | Higher sample recovery, reduces waste |
| Poor chemical resistance | Full PTFE chemical resistance | One membrane handles strong acids, bases, and organics |
| Temporary coated hydrophilicity fails | Non-coating permanent modification | Long-term wetting stability, consistent batch performance |
Case Example:
A European biotech lab standardized on Hawach 0.22 μm PTFE membranes for LC-MS sample prep: 35% faster filtration, zero baseline drift, higher protein analyte recovery.
Compatible With:
Aqueous buffers, HPLC mobile phases, alcohols, acetonitrile, methanol, weak/strong acids and bases, most organic solvents
Avoid:
Fuming strong oxidizing agents under extreme heat, molten alkali metals, highly corrosive fluorinated reagents
A: No. Hawach hydrophilic PTFE is permanently wettable – filter aqueous solutions directly.
A: 0.1 μm, 0.22 μm, 0.45 μm, 1.0 μm, 5.0 μm. Other sizes available on request.
A: 13, 25, 47, 50, 60, 90, 142 mm. Membrane rolls also available.
A: Yes. Low extractables and controlled pore structure ensure stable baseline and minimal interference.
A: Yes. Compatible with autoclaving (121°C, 20 min) and gamma sterilization.
A: Stable from pH 1 to 14.
A: Yes. Free 13/25/47 mm discs for qualified labs – request via email with pore size and lab info.
A: Provided with every order for traceability and compliance.
A: Yes. Contact us with your required width, length, and pore size.
A: Yes. Drop-in replacements for Millipore, Whatman, Advantec, Sartorius, Tisch, and Sterlitech holders.
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