Whatman 1440-047 Filter Circles, 47mm Dia, Ashless Grade 40, 100/pk (PN:1440-047)

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Authorized Whatman DistributorSKU: 1440-047

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Sale price$34.10 Regular price$37.61

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Description

GR 40 4.7CM 100/PK
Quantitative Filter Papers - Ashless Grade 40 circles, 47 mm, 100/pk The classic general purpose ashless filter paper with medium speed and retention.

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Specifications

air-flow-rate 19.3 s/100 mL/in2
brand Whatman
diameter-cm 4.7
diameter-mm 47
grade Grade 40
lead-time 5
list-price 37.61
manufacturer-part-number 1440-047
model Ashless Grade 40
part-number 1440-047
quantity-per-pack 100

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We offer Net 30 terms for qualified business customers, allowing you to receive your order now and pay within 30 days of the invoice date.

Frequently Asked Questions

“Ashless” means the filter paper leaves extremely low inorganic residue (≤0.007% ash) after burning, making it ideal for gravimetric analysis where accurate weight measurements are critical.

Grade 40 is a general-purpose quantitative filter paper commonly used for gravimetric analysis, environmental testing, and routine lab filtration where consistent particle retention and low contamination are required.

This filter paper has a nominal particle retention of approximately 8 µm, making it suitable for capturing medium-sized precipitates in analytical and laboratory workflows.

Grade 40 offers a medium filtration speed, balancing efficient flow with reliable particle retention, which makes it ideal for routine laboratory applications without sacrificing accuracy.

The 47 mm size is widely used because it fits standard filtration setups such as Buchner funnels and vacuum filtration systems, making it a versatile choice for many laboratory workflows.

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