--- product_id: 650436845 title: "9 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 90 mm (100 Discs)" brand: "zenpore" price: "€ 78.16" currency: EUR in_stock: true category: "Ze Npore" url: https://www.desertcart.be/products/650436845-9-cm-lab-filter-paper-standard-qualitative-grade-4-zenpore store_origin: BE region: Belgium --- # Fast flow rate 15-20s/10ml Standard 90 mm diameter Coarse retention 20-25 μm 9 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 90 mm (100 Discs) **Brand:** zenpore **Price:** € 78.16 **Availability:** ✅ In Stock ## Summary > 🧪 Filter Fast, Filter Smart – Don’t Let Your Lab Wait! ## Quick Answers - **What is this?** 9 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 90 mm (100 Discs) by zenpore - **How much does it cost?** € 78.16 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/650436845-9-cm-lab-filter-paper-standard-qualitative-grade-4-zenpore) ## Best For - zenpore enthusiasts ## Why This Product - Trusted zenpore brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Pack Convenience:** 100 discs per pack means you’re always ready for high-volume testing without interruption. - • **Rapid Filtration Power:** Experience ultra-fast sample clarification with 15-20 seconds flow time, saving precious lab hours. - • **Versatile Lab Essential:** Perfect for biological fluids, organic extracts, wine must filtration, and environmental air sampling. - • **Premium Quality Material:** Made from high alpha-cellulose cotton ensuring durability and minimal ash content (0.1%) for clean filtrates. - • **Precision Particle Capture:** Retains coarse and gelatinous precipitates down to 20-25 microns for reliable, consistent results. ## Overview The ZENPORE 9 cm Lab Filter Paper (Grade 4) is a high-performance qualitative filter equivalent to Whatman Grade 4, designed for fast flow and coarse particle retention (20-25 μm). Made from premium alpha-cellulose cotton, these 90 mm discs deliver rapid filtration (15-20 seconds per 10 ml) ideal for biological, environmental, and industrial applications. Supplied in a convenient pack of 100, they ensure consistent, reliable sample clarification with minimal ash residue. ## Description GRADE 4 STANDARD Qualitative Filter Paper Equivalent to Whatman grade 4, this very fast laboratory filter paper is used for coarse filtration when you need to separate a solid or precipitate from the filtrate.Made from high alpha-cellulose cotton, this standard lab filter is not intended for ashing.APPLICATIONSscience : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labsfood : Determination Sodium Chloride in foodstuffsbeverage : Filtration of musts in winemetalurgy : Determination of silicon impurities in pig iron and steelenvironment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical.COARSE RETENTIONRetains coarse particles and gelatinous precipitates like:Metal hydroxides (Al, Cr, Fe, Mg) , Be OxideInsoluble iron and ore, precipitated SilicatesCulture media, and colloidal sedimentspaper : pure cotton celluloseflow : fastretention : 20~25 μm (coarse)speed : 15~20 s (10ml DIN 53137)size : ⌀ 90 mmthickness : 140 μmweight : 86 g/m²ash : 0.1%qty : 100 discsPLAIN-DISCSThese Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.The same affordable filters are also available funnel-ready as ST004-90q (folding) or ST004-90v (pleating).EQUIVALENCE & SIZESee the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles. ## Features - GRADE 4 : 9cm - Equivalent to Whatman qualitative grade 4, standard lab filter paper (90mm) - FAST PRE-FILTER - Quickly clean-up biological samples and organic extracts, routine clarification - WINE MAKING - Filtration of musts - HIGH AIR FLOW COLLECTION - Collect large particulate in fast moving air or fumes - COARSE RETENTION / FAST FLOW - Retains coarse and gelatinous precipitates (20~25 micron)" ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MS1KZ3S | | ASIN | B07MS1KZ3S | | Batteries Included? | No | | Batteries Required? | No | | Customer Reviews | 4.6 4.6 out of 5 stars (220) | | Customer reviews | 4.6 4.6 out of 5 stars (220) | | Cutting Diameter | 90 Millimeters | | Date First Available | 11 January 2021 | | Date First Available | 11 January 2021 | | Item Weight | 60 g | | Item diameter | 90 Millimeters | | Item model number | ST004-90 | | Item model number | ST004-90 | | Manufacturer | Fluted Filter | | Manufacturer | Fluted Filter | | Material | Paper | | Part number | ST004-90 | | Product Dimensions | 9.3 x 9.3 x 2 cm; 60 g | | Size | 9 cm diameter | | Specification met | Din | ## Images ![9 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 90 mm (100 Discs) - Image 1](https://m.media-amazon.com/images/I/71cRwI9P9NL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Qualitative Filter Paper 9 cm Lab Filter Paper for Chemistry, Standard Qualitative Grade 4-Fast Flow 90mm(100 Discs) - Filter Paper 7 cm Lab Qualitative Filter Paper for Chemistry, Standard Qualitative Grade 2-Slow Flow 70mm(100 Discs) - Qualitative Filter Paper 24cm Lab Filter Paper for Chemistry, Standard Qualitative Grade 1-Medium Flow 240mm(100 Discs) --- ## 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.be/products/650436845-9-cm-lab-filter-paper-standard-qualitative-grade-4-zenpore](https://www.desertcart.be/products/650436845-9-cm-lab-filter-paper-standard-qualitative-grade-4-zenpore) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-09-17*