Grade-5
Equivalent to Whatman Grade 5
Particle Retention: 2.5μm
Product Appearance: Smooth
Filtration Speed: Slow
Ash Content(%): <0.1
Thickness(μm): 200
Basis Weight(g/m2): 98
Wet Burst(psi): 0.4
Availability: In Stock
Filter Paper Grade 5 (2.5 µm)
Description
What is Filter Paper Grade 5?
Filter Paper Grade 5 is a high-retention qualitative cellulose filter paper with approximately 2.5 µm particle retention, designed for precise laboratory filtration requiring fine particle capture and high clarity of liquid samples.
It is widely used in chemical analysis, environmental monitoring, soil testing, and gravimetric preparation, especially where very fine suspended solids must be efficiently retained with high accuracy.
Grade 5 is a slow-flow qualitative filter paper manufactured from high-purity cotton linters cellulose. It features a dense and uniform fiber network, enabling efficient retention of very fine particles while maintaining stable filtration performance.
It is typically selected for high-precision laboratory filtration tasks where maximum particle retention is required.
Key Features & Advantages
- 5 µm particle retention– highly effective for very fine precipitates and suspended solids
- Slow filtration speed– optimized for high-precision analytical workflows
- Ultra-low ash content (<0.1%)– minimizes residue interference in gravimetric analysis
- High wet strength– stable during prolonged gravity filtration processes
- Uniform micro-porous structure– ensures consistent retention performance
- High-purity cellulose material– suitable for sensitive analytical applications
Technical Specifications
| Parameter | Specification |
| Product Name | Filter Paper Grade 5 |
| Particle Retention | 2.5 µm |
| Filtration Speed | Slow |
| Basis Weight | 98 g/m² |
| Thickness | ~200 µm |
| Ash Content | < 0.1% |
| Wet Burst Strength | > 180 mm H₂O |
| Material | High-purity cotton linters cellulose |
| Surface | Smooth |
Performance Overview
Grade 5 delivers high retention efficiency for fine and ultra-fine particles, making it suitable for analytical applications requiring high accuracy and low contamination risk.
Its slow flow rate allows improved separation efficiency, particularly in gravimetric analysis and fine precipitate filtration processes.
When to Choose Grade 5
| Application Requirement | Recommended Grade |
| Fast filtration, coarse particles | Grade 4 (20 µm) |
| Balanced filtration speed & clarity | Grade 2 (8 µm) |
| High precision, fine particle retention | Grade 5 |
Grade 5 is ideal when maximum particle retention and analytical precision are required.
Typical Applications
- Gravimetric analysis and quantitative laboratory testing
- Fine precipitate separation in chemical analysis
- Environmental and water quality testing
- Soil and trace particle analysis
- Sample preparation for instrumental analysis
- High-precision laboratory filtration workflows
Grade Comparison
| Hawach Scientific | Whatman | Advantec | Munktell | Ahlstrom | Macherey Nagel |
| Grade 5 | Grade 5 | 235 | 293/120H | 610 | 619eh |
Ordering Information
| Cat# | Description | Equivalent to Whatman | Package(pcs/pk) |
| 22012077 | Grade 5, Slow, 2.5um, 50mm | 1005-050 | 100pcs/pk |
| 22011119 | Grade 5, Slow, 2.5um, 70mm | 1005-070 | 100pcs/pk |
| 22011120 | Grade 5, Slow, 2.5um, 90mm | 1005-090 | 100pcs/pk |
| 22011121 | Grade 5, Slow, 2.5um, 110mm | 1005-110 | 100pcs/pk |
| 22011122 | Grade 5, Slow, 2.5um, 125mm | 1005-125 | 100pcs/pk |
| 22011123 | Grade 5, Slow, 2.5um, 150mm | 1005-150 | 100pcs/pk |
| 22011124 | Grade 5, Slow, 2.5um, 180mm | – | 100pcs/pk |
| 22012047 | Grade 5, Slow, 2.5um, 200mm | 1005-200 | 100pcs/pk |
| 22012048 | Grade 5, Slow, 2.5um, 220mm | 1005-220 | 100pcs/pk |
| 22012078 | Grade 5, Slow, 2.5um, 240mm | 1005-240 | 100pcs/pk |
| 22012049 | Grade 5, Slow, 2.5um, 250mm | 1005-250 | 100pcs/pk |
| 22012079 | Grade 5, Slow, 2.5um, 270mm | 1005-270 | 100pcs/pk |
| 22012051 | Grade 5, Slow, 2.5um, 300mm | 1005-300 | 100pcs/pk |
| 22012052 | Grade 5, Slow, 2.5um, 320mm | 1005-320 | 100pcs/pk |
| 22012053 | Grade 5, Slow, 2.5um, 350mm | 1005-350 | 100pcs/pk |
| 22012054 | Grade 5, Slow, 2.5um, 380mm | – | 100pcs/pk |
| 22012055 | Grade 5, Slow, 2.5um, 400mm | 1005-400 | 100pcs/pk |
| 22012056 | Grade 5, Slow, 2.5um, 450mm | 1005-450 | 100pcs/pk |
| 22012057 | Grade 5, Slow, 2.5um, 600mm | 1005-600 | 100pcs/pk |
OEM customization, private label and bulk supply options are available for laboratories and distributors.
Download PDF Datasheet
FAQ
What is Grade 5 used for?
It is used for high-precision laboratory filtration requiring fine particle retention and accurate analytical results.
What is the particle retention?
The nominal particle retention is 2.5 µm, suitable for very fine particles and analytical filtration.
Can it be used for vacuum filtration?
Yes, it can be used in gravity and vacuum filtration, but is mainly optimized for gravity-based analytical workflows.
How does Grade 5 compare to Grade 2?
Grade 5 provides significantly finer retention but slower filtration speed than Grade 2.
What is the ash content?
Less than 0.1%, ensuring minimal interference in gravimetric and analytical applications.
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