Syringe Filters, 4mm, PVDF, 0.45um Pore Size. Red Polypropylene, AQ Brand. 1000/CS.
Additional Info:
The 58045-V04-K AQ™ Syringe Filters are pharmaceutical-grade, high-throughput micro-volume PVDF membrane filters designed for HPLC sample preparation and dissolution testing in regulated laboratory environments. Featuring a 0.45 µm polyvinylidene fluoride (PVDF) membrane, these filters provide low extractables, broad chemical compatibility, and consistent chromatographic performance, even with very small sample volumes.
PVDF membranes offer low protein binding and compatibility with both aqueous and organic solvents, making them ideal for biological samples and high-purity analytical workflows.
✅ Critical Compliance Advantage (No Flush Required)
Validated to meet key regulatory standards:
US FDA CFR Title 21, Part 210.3(b)(6) – minimum fiber release
USP <788> – particulate matter in injectables
USP “Sterile Water for Injection”
Benefits:
✅ No initial flushing required
✅ No 20 µL discard required
✅ Maximizes recovery of micro-volume samples
✅ Reduces risk of failed methods
Performance & Design
The 0.45 µm pore size is optimized for sample clarification and prefiltration, ensuring consistent flow and particulate removal.
The PVDF membrane combines low protein binding with strong chemical resistance, supporting use with buffers, biological samples, and mixed solvent systems.
The 4 mm format minimizes hold-up volume, making it ideal for micro-volume and high-value samples, while the 1000/case packaging supports high-throughput workflows.
The red housing allows quick identification, and each case includes a Certificate of Analysis.
Key Features
0.45 µm PVDF Membrane (Pharma Grade)
Low protein binding
Suitable for aqueous and organic samples
✅ No Initial Flush Required (Validated)
No 20 µL discard required
Broad Chemical Compatibility
Compatible with buffers and solvents
Low Extractables
Clean chromatographic baselines
Biological Compatibility
Ideal for protein and biomolecule samples
Ultra-Low Volume Format (4 mm)
Minimizes hold-up volume
Maximizes recovery
Bulk Packaging (1000/Case)
Reduces cost per analysis
Ideal for high-volume workflows
Regulatory Compliance
FDA CFR 21, USP <788>
Color-Coded (Red)
Identifies PVDF filters
Typical Applications
HPLC & UHPLC Sample Preparation – micro-volume filtration
LC‑MS Workflows – high-value sample recovery
Biological Samples – protein and biomolecule work
Dissolution Testing – pharmaceutical QC
High-Throughput Laboratories – consistent performance
Specifications
Membrane Material: Polyvinylidene Fluoride (PVDF)
Pore Size: 0.45 µm
Diameter: 4 mm
Housing: Polypropylene (PP)
Color Code: Red
Protein Binding: Low
Chemical Compatibility: Aqueous & organic solvents
Extractables: None detectable (no flush required)
Initial Discard Volume: None (20 µL not required)
Membrane Thickness: 135 µm (±15 µm)
Sterilization: Autoclave or EO
Compliance: FDA CFR 21, USP <788>
Pack Size: 1000/Case
Brand: AQ™
Resources & Ordering Options
Purchase PVDF syringe filters, 0.45 µm, 4 mm – 50/pack quantity
Order PVDF syringe filters, 0.45 µm, 4 mm – 100/pack quantity