We do not offer international shipping to countries within the European Union
We can only ship non-hazardous products to Rest of World

Compare all Pack Sizes
Unfortunately, we are not currently accepting orders for Northern Ireland, Jersey and Guernsey.
We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.
AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE
Standard Qualitative Filter Papers are used for low gravity, or quadrant-folded applications. They have a higher level of α- cellulose than other filter papers. This means that they will weaken when the papers are introduced to water. We do not recommend Standard Qualitative Filter Papers if wet handling or vacuum work is necessary. In routine quadrant-folded applications the underlying strength of standard (untreated) grades does not present an issue.
Grade 301: is a very slow-filtering qualitative paper with high efficiency in retaining fine particles. It's commonly used in qualitative analytical techniques to identify materials in biological products, water and soil.
Application: Barium Sulphate, Metastannic Acid, Cuprous Oxide
Qualitative Analysis
Ideal for determining and identifying materials in analytical procedures.
Biological Products
Used in the processing and analysis of biological substances.
Water and Soil Analysis
Effective in environmental testing to assess water and soil quality.
Fine Precipitate Filtration
Suitable for filtering fine precipitates like cold-precipitated barium sulfate.
Clarification
Used to clarify cloudy suspensions and wine, ensuring product clarity.
Available Grades
| Grade | Whatman Equivalent | Speed | Thickness (mm) | Pore Size (μM) | Weight (g/m²) | Filtration Speed (sec*) | Burst Strength (kg/cm²) |
|---|---|---|---|---|---|---|---|
| 301 | = No.5 | Very Slow Filtering | 0.14 | 2-3 | 84 | 180 | > 0.30 |
| 302 | = No.3 | Medium Filtering | 0.3 | 12-16 | 150 | 65 | 3.90 |
| 303 | = No.2 | Medium Filtering | 0.16 | 5-8 | 87 | 50 | > 0.10 |
| 304 | = No.1 | Medium Filtering | 0.16 | 5-13 | 73 | 88 | 1.95 |
| 305 | = No.4 | Fast Filtering | 0.20 | 12-15 | 84 | 10 | > 0.30 |


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