GR 42 4.25CM 100/PK is supplied by the company Whattman PLC.

Grade 42 Ashless Filter Paper is designed ideally for instrumental analysis. This Grade 42 Ashless Filter Paper has the finest retention capacity of all Whatmann filters.

Product specifications:

• Catalog number: 1442-042
• Brand: Whatman
• Quantity/unit: Pack of 100

Product features:

• Diameter: 42.5mm
• Format: Circle
• Type: Ashless
• Grade: Grade 42
• Basis weight: 100 g/m;2
• Air flow rate: 96 s/100 mL/in2;
• Nominal ash content: 0.007%
• Material: High-quality cotton linters
• Nominal thickness: 200 m
• Typical particle retention in liquid: 2.5 m
• Typical water flow rate: 5 ml/min