Whatman® qualitative filter paper, Grade 6, circles

Whatman® Grade 6 Qualitative Filter Paper (1006-090) is a standard grade cellulose filter paper widely used in qualitative analytical techniques to identify and separate fine particles. Manufactured from high-purity cellulose fibers, this filter paper offers fine particle retention (~3 μm) while providing fast filtration speed, making it ideal for applications that require efficient removal of small particles without excessive flow restriction.

With a diameter of 90 mm, these pre-cut circular filters are packaged in packs of 100 and offer twice the speed of Grade 5 while maintaining similar fine particle retention, making them an excellent choice for laboratories, environmental testing, food analysis, and educational use.

Key Features & Benefits

✅ Fast Filtration with Fine Particle Retention

• Retains particles as small as 3 µm
• Herzberg filtration speed: 715 sec/100 mL
• Offers twice the flow rate of Whatman Grade 5

✅ High-Quality Cellulose Material

• Made from refined cotton linters, free from additives or binders
• Ensures chemical purity and consistent analytical performance

✅ Standard Format & Versatile Use

• 90 mm diameter circles—ideal for Büchner funnels, filtration assemblies, and lab setups
• Compatible with qualitative gravimetric analysis, routine sample filtration, and precipitate collection

✅ Low Ash Content

• Ash content ≤ 0.06%, suitable for general laboratory filtration that doesn't require ashless paper
• Maintains structural integrity during wet filtration

✅ Durable & Reliable

• Wet burst strength: 0.25 psi
• Thickness: 180 μm
• Basis weight: 100 g/m² for stable mechanical performance

Technical Specifications

Available Sizes in Grade 6 (Circle Format)

Applications

• General qualitative analysis
• Routine laboratory filtration
• Environmental water or air sample filtration
• Food and beverage industry testing
• Chemical and industrial applications
• Gravimetric analysis and sample separation in education
• Precipitate recovery

Why Choose Whatman® Grade 6 Filter Paper (1006-090)?

✅ Fine particle retention (~3 μm) with fast flow rate

✅ Twice the speed of Grade 5 with similar retention performance

✅ Chemically stable, low ash, and high purity

✅ Trusted Whatman quality for consistent filtration results

✅ Available in multiple sizes for different filter holders and funnels

This filter paper is a reliable and efficient solution for labs that need a balance between retention and speed in non-critical filtration workflows.