Filter paper circles, MN 1640 d, Quantitative, Slow (140 s), Smooth
MN1640d is a wet-strengthened, slow, ashless filter paper with very fine particle retention. Standard paper for critical gravimetric analysis of fine precipitates like barium sulfate or metastannic acid. The smooth surface allows fiber-free filtration, even for highly acidic and basic media.
| Format | Filter paper circles |
| Grade | MN 1640 d |
| Surface | Smooth |
| Basis weight | 85 g/m² |
| Thickness | 0.17 mm |
| Filtration speed description | Slow |
| Filtration speed | 140 s |
| Quality | Quantitative |
| Material | Cellulose |
| Ash content | < 0.01 % |
| Color | White |
| Retention capacity | 2–4 µm |
| Wetstrength | Strong |
| Diameter | 55 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 185 mm, 240 mm, 270 mm, 320 mm |
| Scope of delivery | 100 filters per pack |
| Hazardous material | No |
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