Grade 1
Equivalent to Whatman Grade 1
Particle Retention: 11μm
Product Appearance: Smooth
Filtration Speed: Medium
Ash Content(%): <0.1
Thickness(mm): 180
Basis Weight(g/m2): 88
Wet Burst(psi): 0.3
Availability: In Stock
Filter Paper Grade 1 (11 µm)
Description
What is Filter Paper Grade 1?
Filter Paper Grade 1 is an 11 µm medium-speed qualitative cellulose filter paper widely used for routine laboratory filtration, liquid clarification, and qualitative analysis.
Grade 1 is manufactured from high-purity cotton linters. It features a uniform cellulose fiber structure that ensures stable filtration performance and low contamination risk.
It provides a balanced combination of filtration speed and particle retention, making it suitable for handling common precipitates and suspended solids in daily laboratory workflows.
This grade is one of the most widely used general-purpose filter papers for research, quality control, and educational laboratories.
Product Specifications
| Parameter | Specification |
| Product Name | Filter Paper Grade 1 |
| Particle Retention | 11 µm |
| Filtration Speed | Medium |
| Basis Weight | 80 ± 4 g/m² |
| Thickness | 200 µm |
| Ash Content | < 0.1% |
| Wet Burst Strength | > 140 mm H₂O |
| Material | High-purity cotton linters cellulose |
| Surface | Smooth & uniform |
Key Features & Advantages
- 11 µm particle retention– suitable for medium-sized precipitates and suspended solids
- Balanced filtration speed– ideal for routine laboratory workflows
- Low ash content (<0.1%)– reduces residue interference in analysis
- High wet strength– suitable for gravity and vacuum filtration
- Uniform fiber structure– ensures consistent and repeatable results
- Low background interference– suitable for analytical applications
Technical Performance
Grade 1 offers a practical balance between filtration speed and particle retention, making it one of the most commonly used qualitative filter papers in laboratories worldwide.
It performs reliably under both gravity and vacuum filtration conditions, maintaining structural stability during routine laboratory operations.
Typical Applications
- Routine laboratory filtration and sample clarification
- Qualitative chemical analysis and precipitate separation
- Sample preparation for instrumental analysis
- Soil, agricultural and environmental testing
- Educational laboratory experiments
- Removal of suspended solids from buffer and extraction solutions
When to Use Filter Paper Grade 1
- For general-purpose laboratory filtration tasks
- When particle size is approximately 11 µm
- When both filtration speed and clarity are required
- When low ash content is important for analytical accuracy
- For routine qualitative filtration workflows
Related Filter Paper Grades
- Grade 2 – 8 µm finer retention
- Grade 4 – 20 µm fast filtration
- Grade 5 – 2.5 µm fine retention
- Grade 6 – 3 µm precision filtration
Grade Comparison
| Hawach | Whatman | Advantec | Munktell | Ahlstrom | Macherey Nagel | Sartorius |
| Grade 1 | Grade 1 | 2 | No.1/1F | 601 | 616md | 292 |
Ordering Information
| Cat# | Description | Equivalent to Whatman | Package(pcs/pk) |
| 22012002 | Grade 1, Medium, 11um, 45mm | – | 100pcs/pk |
| 22012003 | Grade 1, Medium, 11um, 47mm | – | 100pcs/pk |
| 22012004 | Grade 1, Medium, 11um, 50mm | 1001-050 | 100pcs/pk |
| 22012005 | Grade 1, Medium, 11um, 55mm | 1001-055 | 100pcs/pk |
| 22011101 | Grade 1, Medium, 11um, 70mm | 1001-070 | 100pcs/pk |
| 22011102 | Grade 1, Medium, 11um, 90mm | 1001-090 | 100pcs/pk |
| 22011103 | Grade 1, Medium, 11um, 110mm | 1001-110 | 100pcs/pk |
| 22011104 | Grade 1, Medium , 11um, 125mm | 1001-125 | 100pcs/pk |
| 22011105 | Grade 1, Medium, 11um, 150mm | 1001-150 | 100pcs/pk |
| 22011106 | Grade 1, Medium, 11um, 180mm | – | 100pcs/pk |
| 22012007 | Grade 1, Medium, 11um, 185mm | 1001-185 | 100pcs/pk |
| 22012008 | Grade 1, Medium, 11um, 200mm | 1001-200 | 100pcs/pk |
| 22012009 | Grade 1, Medium, 11um, 220mm | 1001-220 | 100pcs/pk |
| 22012010 | Grade 1, Medium, 11um, 240mm | 1001-240 | 100pcs/pk |
| 22012011 | Grade 1, Medium, 11um, 250mm | 1001-250 | 100pcs/pk |
| 22012012 | Grade 1, Medium, 11um, 270mm | 1001-270 | 100pcs/pk |
| 22012014 | Grade 1, Medium, 11um, 300mm | 1001-300 | 100pcs/pk |
| 22012015 | Grade 1, Medium, 11um, 320mm | 1001-320 | 100pcs/pk |
| 22012016 | Grade 1, Medium, 11um, 350mm | 1001-350 | 100pcs/pk |
| 22012017 | Grade 1, Medium, 11um, 380mm | – | 100pcs/pk |
| 22012018 | Grade 1, Medium, 11um, 400mm | 1001-400 | 100pcs/pk |
| 22012019 | Grade 1, Medium, 11um, 450mm | 1001-450 | 100pcs/pk |
| 22012020 | Grade 1, Medium, 11um, 600mm | 1001-600 | 100pcs/pk |
Custom sizes, sheets, and OEM/private label options are available upon request.
Download PDF Datasheet
FAQ
What is Filter Paper Grade 1 used for?
It is used for routine laboratory filtration, liquid clarification, and qualitative analysis.
What is the particle retention of Grade 1?
Approximately 11 µm, suitable for medium-sized suspended solids.
Can it be used for vacuum filtration?
Yes, it is suitable for both gravity and vacuum filtration.
What is the ash content?
Less than 0.1%, suitable for analytical applications requiring low residue.
How does Grade 1 compare to other grades?
Grade 1 provides a balance between speed and retention, while finer grades offer higher precision and coarser grades provide faster filtration.
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