Whatman Grade No. 42 Quantitative Filter Paper Ashless Whatman. 42 Quantitative Filter Paper Ashless 1442-150 is ideal for the preparatory steps in the Toxicity Testing and Analysis of Residues. Pre-weighed to insure consistency and eliminate batch-to-tank variability. Whatman Ashless No. 42 Quantitative Filter Paper is pure cellulose containing no additives or chemical aids and is highly breathable. Whatman Grade No. 42 Quantitative Filter Paper No. 42 only burns during the oxidation process and leaves no residue in the form of gases or liquids in the presence of undesirable bacteria molds or viruses. Whatman No. 42 Quantitative Filter Paper is highly recommended for the oxidation-reduction reactions of urines and feces. Whatman No. 42 Ashless Quantitative Filter Paper No. 42 is impervious to protein nucleic acids and other molecules in the presence of moisture. This feature allows the paper to be used for the filtration of large volumes through a standard-size microtube. Specifications for Whatman Grade No. 42 Quantitative Filter Paper Ashless Whatman 1442-150 : Diameter cm: 15.0 Whatman No.: 1442-150 Unit: Pack of 100 Porosity: Fine Flow Rate: Slow Particle Retention: 2.5 m (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Whatman products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Filters with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Whatman Filters. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Whatman Grade No. 42 Quantitative Filter Paper Ashless Whatman 1442-150/ 28480-140 we carry a full complement of Filters as well as other product offerings from Whatman. We also carry a full line of Whatman accessories to help meet your laboratory and scientific needs. For a complete selection of Whatman Filters please visit our Whatman page. For more brand name Filters please visit our Filters store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Whatman Grade No. 42 Quantitative Filter Paper Ashless Whatman 1442-150