--- product_id: 28253875 title: "1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100)" brand: "whatman" price: "B/.67" currency: PAB in_stock: true reviews_count: 10 category: "Whatman" url: https://www.desertcart.com.pa/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5 store_origin: PA region: Panama --- # 42.5mm diameter circles 11µm medium retention 10.5 s/100mL/sq inch flow rate 1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) **Brand:** whatman **Price:** B/.67 **Availability:** ✅ In Stock ## Summary > 🔬 Elevate your lab game with precision you can trust! ## Quick Answers - **What is this?** 1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) by whatman - **How much does it cost?** B/.67 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5) ## Best For - whatman enthusiasts ## Why This Product - Trusted whatman brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Diameter:** 42.5mm circles fit standard lab funnels and equipment seamlessly. - • **Multi-Industry Essential:** Trusted across food, agriculture, air quality, and education sectors for diverse analytical needs. - • **Precision Filtration, Every Time:** Grade 1 cellulose paper ensures consistent 11µm particle retention for reliable lab results. - • **Optimized Flow Rate for Efficiency:** 10.5 seconds per 100mL per square inch balances speed and accuracy in filtration. - • **Educational & Professional Standard:** Widely adopted in teaching labs and industrial applications, ensuring you stay ahead in your field. ## Overview Whatman Grade 1 Quantitative Filter Paper Circles (42.5mm, 11µm retention) deliver medium retention and optimized flow rate (10.5 s/100mL/sq inch) for reliable filtration across food, agriculture, air pollution, and educational applications. Pack of 100 ensures consistent performance for routine qualitative and quantitative lab separations. ## Description This Whatman 1.5cm, grade 1, cellulose filter paper is the most widely used filter paper for routine applications with medium retention (11µm) and flow rate. Traditionally, this grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate. In agriculture, it is used for soil analysis and seed testing procedures. It is also used for numerous routine techniques in the food industry to separate solid foodstuffs from associated liquid or extracting liquid; and is widely used in education for teaching simple qualitative analytical separations. In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain-intensity is measured photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and color formation is quantified by optical reflectance. Retention: 11µm. Diameter: 1.5cm. 500/Pack. Whatman #: 1001-0155. Review: Evens Out Water On Coffee - I use it for my Mr. Coffee single cup/steam coffee maker. Lasts most of week and distribute water evenly. Review: Whatman filter papers - Needed decent filter papers for waste water filtration for filtered BOD the papers were all I needed and happy with purchase I would buy these again ## Features - 1.5cm - Grade 1 - Covers a wide range of laboratory applications; frequently used for clarifying liquids - Areas of use include the food industry, agriculture, air pollution monitoring, and gas detection - Widely used in education for teaching simple qualitative analytical separations ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.1 out of 5 stars 23 Reviews | ## Images ![1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) - Image 1](https://m.media-amazon.com/images/I/612Nq1-V77L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What's a good product to use the smaller ones with? Amazon sell anything good?** A: You question makes no sense at all. **Q: If needed, can these be cut to fit a specific size of funnel? Or would I be better off just buying some of the square filters and cutting those?** A: Buy the correct size for your Buckner funnel; if you are using a gravity funnel, look up how to fold round filter paper for this type filter. **Q: Will these tolerate chlorinated solvents or will they dissolve?** A: This filters will tolerate ## Customer Reviews ### ⭐⭐⭐⭐⭐ Evens Out Water On Coffee *by D***P on January 20, 2021* I use it for my Mr. Coffee single cup/steam coffee maker. Lasts most of week and distribute water evenly. ### ⭐⭐⭐⭐ Whatman filter papers *by D***R on January 2, 2014* Needed decent filter papers for waste water filtration for filtered BOD the papers were all I needed and happy with purchase I would buy these again ### ⭐⭐⭐⭐⭐ Good quality originals *by C***G on November 4, 2021* Good quality original filters from whatman ## Frequently Bought Together - Whatman 1001-042 Quantitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 42.5mm Diameter (Pack of 100) - Weigh Boats Medium (100ml, 125 Pack) Disposable Plastic Trays for Scale, Anti-Static Square Tray Weighing Dishes, Polystyrene Lab Dish for Powder Weight, Mixing Epoxy, Food Sample Container, Pour Boat - ALDON Innovating Science 0.1M Hydrochloric Acid, 1L Excellent for Chemistry or Refinement Experiments - The Curated Chemical Collection --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.pa/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5](https://www.desertcart.com.pa/products/28253875-1001-042-quantitative-filter-paper-circles-11-micron-10-5) --- *Product available on Desertcart Panama* *Store origin: PA* *Last updated: 2026-06-20*