Whatman 1450-090 Filter Circles, 90mm Dia, Hardened Low Ash Grade 50, 100/pk (PN:1450-090)

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Authorized Whatman DistributorSKU: 1450-090

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Sale price$48.84 Regular price$53.88

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Description

GR 50 9CM 100/PK
Quantitative Filter Papers - Hardened Low Ash Grade 50 circles, 90 mm 100/pk Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers. Slow flow rate. Hardened and highly glazed surface.

Also, check out the Ahlstrom 0540-1850 Quantitative Filter Paper, Grade 54, 185 mm

Specifications

air-flow-rate 96 s/100 mL/in2
brand Whatman
diameter-cm 9.0
diameter-mm 90
grade Grade 50
lead-time 5
list-price 53.88
manufacturer-part-number 1450-090
model Grade 50
part-number 1450-090
quantity-per-pack 100

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Frequently Asked Questions

Whatman Grade 50 filter paper is designed for quantitative laboratory filtration where very fine precipitates must be retained and recovered accurately. It is commonly used in analytical chemistry, environmental testing, and materials research where precise particle separation is required.

This filter paper provides approximately 2.7 µm particle retention, allowing it to capture very fine crystalline precipitates during filtration. Its slow filtration rate improves retention of small particles and helps ensure accurate analytical results.

Hardened low ash filter paper is chemically treated to increase wet strength and reduce fiber shedding, which allows the paper to withstand vacuum filtration and scraping of collected precipitates. Its very low ash content (≤0.015%) ensures minimal residue after combustion, which is essential for accurate gravimetric analysis.

These filter circles are designed for use in gravity filtration or vacuum filtration systems, including setups with Büchner funnels or Hirsch funnels. Their hardened surface helps maintain structural integrity even under vacuum suction conditions.

The Whatman 1450-090 filter paper features a 90 mm diameter circular format, Grade 50 cellulose filter media, approximately 115 µm thickness, and packaging of 100 circles per pack. It is known as the thinnest hardened Whatman filter paper, providing slow filtration and strong retention of very fine particles.

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