Ahlstrom 6170-2500 Qualitative Filter Paper, Grade 617, 250 mm, 50/pk

Ahlstrom Grade 617 is a qualitative filter paper designed for routine laboratory filtration, including liquid clarification and separation of precipitates. It is commonly used in environmental testing, food analysis, and general lab applications where consistent results are required.

Qualitative filter papers like Grade 617 are engineered to provide a balance between particle retention and flow rate, allowing efficient filtration of medium to coarse particulates while maintaining steady throughput for everyday lab work.

This filter paper is produced from high-purity alpha-cellulose fibers, which ensures low ash content, minimal contamination, and consistent analytical performance.

The 250 mm size is ideal for large-volume filtration tasks, such as:

Bulk sample preparation
Industrial or environmental testing
Large Büchner funnel or gravity filtration setups

This size helps improve efficiency when handling higher sample volumes.

Grade 617 is intended for qualitative filtration, meaning it is best for separation and clarification tasks rather than precise residue measurement. For gravimetric or ash analysis, a quantitative (ashless) filter paper would be recommended instead.