CN Membrane Filter, White with Black Grid, 47mm, 0.45um, Sterile, Individually Wrapped
R 425.21
- Membrane material: CN (cellulose nitrate)
- Pore size: 0.45 µm
- Diameter: 47 mm
- Colour / surface: White, gridded
- Wettability: Hydrophilic
- Bubble point: 0.215–0.24 MPa (water, 25°C)
- Membrane flux: 61–70 ml/cm2/min at −0.085 MPa
- Maximum operating temperature: 75°C
- Sterilisation: Gamma irradiation, ISO 11137, SAL 10−6
- Sterility test: Seven-Day Sterility Test (USP), no growth observed
- Microbial retention: 107 organisms/cm2 Serratia marcescens (ATCC 19146), fecal coliform retention >90%
- Manufacturing standard: ISO 9001
- Pack size: 100 filters per pack
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Availability:In stock
SKU
FLASM47CN045GWS
Product Overview
This is a hydrophilic cellulose nitrate (CN) membrane filter with a printed grid, supplied sterile and ready for aseptic use straight from the pack. The open, symmetric pore structure gives it a comparatively high flow rate, and the grid overlay makes it a practical choice where colonies or particles need to be counted directly on the membrane surface.
The membrane is compatible with aqueous solutions across a pH 4 to 8 range, along with a number of organic solvents, which suits it to general microbiology, sample clarification, and particle-retention work across research and QC laboratories.
Each production lot is gamma-irradiated to ISO 11137 (Sterility Assurance Level 10-6) and manufactured at an ISO 9001-certified facility. This specific SKU is supplied at a nominal 0.45 µm pore size, which is suited to particle removal, clarification, and general microbiological analysis rather than absolute sterilising-grade filtration.
Key Features
- Hydrophilic CN membrane with a symmetric pore structure for consistent flow
- Printed grid lines to assist direct colony or particle counting on the membrane surface
- White surface for standard-contrast visual examination
- Compatible with aqueous solutions (pH 4–8) and a range of organic solvents
- Supplied pre-sterilised by gamma irradiation for direct aseptic use
Typical Applications
- Clarification of aqueous solutions and particle removal
- General microbiology analysis
- QC of fluid holding tanks and fluid or air monitoring
- Particle collection and analysis
Quality, Certifications & Validation
- Manufactured under an ISO 9001-certified Quality Management System
- Sterilised by gamma irradiation to ISO 11137, Sterility Assurance Level 10⁻⁶
- Seven-Day Sterility Test (per USP): no growth observed on sterilised samples
- Microbial retention challenge: retention of 10⁷ organisms/cm² Serratia marcescens(ATCC 19146), with fecal coliform retention greater than 90%
Validation data sourced from the manufacturer's lot-specific Quality Certificate; results apply to the tested production lot.
| Parameter | Value |
|---|---|
| Membrane material | CN (cellulose nitrate) |
| Pore size | 0.45 µm |
| Diameter | 47 mm |
| Wettability | Hydrophilic |
| Colour / surface | White, gridded |
| Initial thickness | 110 ± 20 µm |
| Bubble point | 0.215–0.24 MPa (water, 25 °C) |
| Membrane flux | 61–70 ml/cm²/min at −0.085 MPa |
| Maximum operating temperature | 75 °C |
| Sterilisation | Gamma irradiation, ISO 11137, SAL 10−6 |
| Pack size | 100 filters per pack |
Bubble point and membrane flux were determined by the manufacturer using water at 25 °C.
Frequently Asked Questions about the CN Membrane Filter, White Gridded, 47mm, 0.45µm, Sterile
Q: What is the CN Membrane Filter, White Gridded, 47 mm, 0.45 µm?
A: It is a sterile, hydrophilic cellulose nitrate (CN) membrane filter with a 47 mm diameter, nominal 0.45 µm pore size and white gridded surface. It is designed for applications including general microbiological analysis, clarification and particle collection.
Q: What material is the membrane filter made from?
A: The membrane is made from cellulose nitrate (CN) and has a symmetric pore structure designed to provide consistent flow.
Q: What is the pore size of this CN membrane filter?
A: The nominal pore size is 0.45 µm.
Q: What is the diameter of the membrane?
A: Each membrane has a diameter of 47 mm.
Q: Is the CN membrane hydrophilic?
A: Yes. The membrane is hydrophilic, making it suitable for filtration of compatible aqueous solutions.
Q: Why does the membrane have a printed grid?
A: The printed grid lines assist with direct colony or particle counting on the membrane surface, particularly during microbiological and particle-analysis applications.
Q: What colour is the membrane?
A: The membrane has a white, gridded surface for standard-contrast visual examination.
Q: Is this membrane filter supplied sterile?
A: Yes. The membrane filters are supplied pre-sterilised by gamma irradiation for direct aseptic use.
Q: What sterilisation method is used?
A: The filters are sterilised using gamma irradiation in accordance with ISO 11137, with a stated Sterility Assurance Level (SAL) of 10−6.
Q: Has the sterility of the membrane been tested?
A: Yes. The supplied validation information states that a Seven-Day Sterility Test performed according to USP showed no growth on sterilised samples.
Q: What is the microbial retention performance of the membrane?
A: The supplied lot-specific validation information reports a microbial challenge involving 107 organisms/cm2 of Serratia marcescens (ATCC 19146) and fecal coliform retention greater than 90%.
Q: Is the 0.45 µm membrane intended as a sterilising-grade filter?
A: The supplied product information describes this 0.45 µm membrane as suitable for particle removal, clarification and general microbiological analysis rather than absolute sterilising-grade filtration.
Q: What is the membrane flux?
A: The specified membrane flux is 61–70 mL/cm2/min at −0.085 MPa. The manufacturer’s measurement was performed using water at 25°C.
Q: What is the bubble point of the membrane?
A: The specified bubble point is 0.215–0.24 MPa, measured by the manufacturer using water at 25°C.
Q: What is the thickness of the CN membrane?
A: The specified initial membrane thickness is 110 ± 20 µm.
Q: What is the maximum operating temperature?
A: The specified maximum operating temperature is 75°C.
Q: What pH range is compatible with this membrane?
A: The supplied product information states that the membrane is compatible with aqueous solutions across a pH range of 4 to 8.
Q: Can the CN membrane be used with organic solvents?
A: The supplied information states that the membrane is compatible with a range of organic solvents. Compatibility should therefore be confirmed for the specific solvent and operating conditions before use.
Q: What are typical applications for this 0.45 µm CN membrane filter?
A: Typical applications include clarification of aqueous solutions, particle removal, general microbiological analysis, QC of fluid holding tanks, fluid or air monitoring, and particle collection and analysis.
Q: Can this membrane be used for microbiological analysis?
A: Yes. General microbiological analysis is one of the specified applications, and the white gridded surface facilitates visual counting of colonies retained on the membrane.
Q: Can the membrane be used for particle collection and analysis?
A: Yes. Its 0.45 µm nominal pore size and gridded surface make particle collection and subsequent examination one of the listed applications.
Q: Can this membrane be used for fluid and air monitoring?
A: Yes. The supplied product information lists QC of fluid holding tanks and fluid or air monitoring among its typical applications.
Q: What manufacturing quality standard applies to these filters?
A: The filters are stated to be manufactured at a facility operating an ISO 9001-certified Quality Management System.
Q: What standards are associated with this membrane filter?
A: The supplied information identifies ISO 9001 for the manufacturing facility’s Quality Management System and ISO 11137 for gamma sterilisation, with an SAL of 10−6.
Q: Are the validation results applicable to every production lot?
A: The stated validation data were sourced from the manufacturer’s lot-specific Quality Certificate, so the reported results apply to the tested production lot.
Q: How many membrane filters are supplied per pack?
A: Each pack contains 100 membrane filters.
Q: What is the SKU for the sterile 47 mm, 0.45 µm white gridded CN membrane filter?
A: The listed SKU is FLASM47CN045GWS.
| Pore Size | 0.45 μm |
|---|---|
| Diameter | 47 mm |
| Sterilisation | Sterile |
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