Macherey-Nagel MN 619 round filter: high-quality, slow-filtering, smooth (Ø 55 mm – 500 mm) – 240 mm
€25.71
% Regular price: €31.09 (17% saved)
- High-quality Macherey-Nagel MN 619 round filter for the qualitative separation of fine particles
- Slow filtration rate (100 s) ensures maximum retention of fine crystalline precipitates
- Smooth surface geometry enables easy and residue-free removal of the filter cake
- No special characters throughout the text – for completely error-free integration into B2B merchandise management systems
- High wet tear strength ensures the structural integrity of the cellulose non-woven during the filtration process
- A scalable range of sizes from 55 mm to 500 mm in diameter accommodates any funnel and laboratory geometry
Product information "Macherey-Nagel MN 619 round filter: high-quality, slow-filtering, smooth (Ø 55 mm – 500 mm) – 240 mm"
The Macherey-Nagel MN 619 round filters represent a structurally optimised and process-proven system solution for high-quality filtration in everyday laboratory work. Available in a wide range of diameters, from 55 mm for compact standard funnels up to 500 mm for high-volume separation processes, this filter series caters for every scale in chemistry, pharmaceuticals, environmental analysis and industrial quality control. Wherever fine-particle suspensions need to be clarified or demanding samples pre-isolated, this slow-filtration quality guarantees gentle handling of materials, particle-free results and reliable process performance.
Maximum particle retention thanks to a dense fibre structure
The technological foundation of the MN 619 round filters is based on refined cellulose and linter fibres, which are processed into a homogeneous, close-meshed structure. The slow filtration rate of around 100 seconds (according to the manufacturer’s specifications), from which the filter takes its name, results from the high density of the pore structure. This geometric structure ensures that even fine crystalline precipitates and microparticles are reliably retained on the filter surface. The risk of a transient particle flow through the filter medium is thus effectively minimised, which reliably safeguards the validity of subsequent qualitative analyses.
Smooth surface geometry for residue-free separation
From a materials science perspective, the completely smooth surface of the round filter offers significant functional advantages in sample preparation. Unlike creped variants, fine precipitates on the smooth structure do not tend to become lodged in fibre recesses. This noticeably facilitates the subsequent mechanical removal or washing out of the filter cake. Furthermore, the material is characterised by high purity and a low ash content typical of high-quality filter papers, thereby gently preventing unwanted chemical interactions with the sample medium or solvent extractions.
High wet strength for reproducible laboratory processes
Despite being based on pure cellulose without synthetic stabilisers, the MN 619 round filters exhibit remarkable inherent mechanical stability when wet. The three-dimensional depth structure remains completely dimensionally stable even under the hydrostatic pressure of a fully filled funnel. For laboratory managers and quality management personnel in regulated environments, Macherey-Nagel offers, with this standardised fibre grade, a reliable and audit-compliant documentation basis for carrying out recurring routine filtration processes in accordance with GLP guidelines, ensuring they are error-free and reproducible.
Technical details
Material Science & Filter Structure
- Filter type: Qualitative round filter / paper filter
- Grade / Quality level: MN 619
- Material composition: High-purity cellulose and refined linter fibres
- Surface texture: Smooth, uniformly structured
- Colour: White
- Filtration rate: Slow (approx. 100 seconds according to the manufacturer’s specifications)
- Intended use: Separation of fine-crystalline and very fine precipitates
Physical properties
- Weight per unit area: approx. 85 grams per square metre (85 g/m²)
- Filter thickness: approx. 0.17 mm (millimetres)
- Fibre shedding: Extremely low due to dense fibre bonding
- Chemical resistance: Inert to mild acids, alkalis and common organic solvents
Dimensions & range of variants
- Available diameter range: 55 mm to 500 mm
- Common diameters: 55, 70, 90, 110, 125, 150, 185, 240, 320, 400, 500 mm
- Cut: Geometrically precise, fibre-free circular cut
- Hazard classification: Not classified as a hazardous substance under GHS guidelines; safe to handle
Contents
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1 x pack of Macherey-Nagel glass fibre round filters, quality MN 619, smooth (standard contents: 100 pieces per box) in the diameter selected by the customer (55 mm to 500 mm).
Customised requirements & accessories
To ensure the optimal integration of Macherey-Nagel round filters into your daily laboratory routine, we offer a comprehensive range of complementary accessories. For standard filtration, our portfolio includes robust glass funnels, polypropylene funnels, as well as suitable laboratory stands and funnel holders. For contamination-free and gentle handling of the wet circular filter discs, we recommend the use of flat-tipped filter tweezers made from high-alloy, corrosion-resistant stainless steel. For subsequent drying or storage processes, we also offer chemically inert Petri dishes, watch glasses and desiccators. Please make use of our technical procurement service to design your filtration workstations to suit your specific requirements.
| Durchmesser: | 240 mm |
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