Whatman Qualitative Filter Paper – Grade 2, 185 mm Diameter

A widely used laboratory filter paper, Whatman Grade 2 is known for its medium retention and flow rate, making it ideal for a broad range of routine filtration applications. With a 185 mm diameter, this size is well-suited for larger funnels and filtering volumes of liquid in educational and research settings.

Key Features:

• Grade: Whatman Grade 2
• Diameter: 185 mm (18.5 cm)
• Type: Qualitative filter paper
• Retention: Medium (~8 µm nominal particle retention)
• Flow Rate: Medium
• Material: High-purity cellulose
• Use Case: Standard grade for general lab work and teaching

Common Applications:

• Clarifying liquids in science labs
• Separation of precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate
• Food science applications – separating solids from liquids
• Routine filtration tasks in schools, universities, and industry
• Widely used as a teaching-grade filter for NCEA and IB chemistry

Recommended for:

• Chemistry experiments
• Sample preparation
• Solid-liquid separation in food testing