GR 540 2.1CM 100/PK is supplied by the company Whattman PLC.

Grade 540 Ashless General Lab Filter Paper is designed ideally for quantitative or gravimetric analysis of strongly acidic or alkaline samples. This Grade 540 Ashless General Lab Filter Paper is a high purity, acid-treated cellulose lab filter paper.

Product specifications:

• Catalog number: 1540-321
• Brand: Whatman
• Quantity/unit: Pack of 100

Product features:

• Diameter: 321mm
• Format: Circle
• Grade: Grade 540
• Type: Hardened Ashless
• Basis weight: 85 g/m;;2
• Air flow rate: 13 s/100 mL/in2;
• Nominal ash content: 0.005%
• Material: High-quality cotton linters
• Nominal thickness: 160 m
• Typical particle retention in liquid: 8 m
• Typical water flow rate: 97 ml/m
• Alpha cellulose content min: 98%