FAQ-2796
What is the composition of Buffer RW1?
The exact composition of Buffer RW1 is confidential. Buffer RW1 is a proprietary component of RNeasy Kits. Buffer RW1 contains a guanidine salt, as well as ethanol, and is used as a stringent washing buffer that efficiently removes biomolecules such as carbohydrates, proteins, fatty acids etc., that are non-specifically bound to the silica membrane. At the same time, RNA molecules larger than 200 bases remain bound to the column.
Note: Buffer RW1 should not be used for isolation of small RNAs, for example, microRNAs or fragmented RNA from formalin-fixed tissues, as these smaller fragments will be washed away. Buffer RWT should be used instead.
Related products
RNeasy Universal Kits
The RNeasy Plus Universal Mini Kit integrates fast, convenient RNA purification with effective elimination of genomic DNA. Optimized protocols enable purification of high-quality RNA from any type of tissue, even difficult-to-lyse tissues. The kit includes QIAzol Lysis Reagent for lysing fatty tissue and other types of tissue and RNeasy spin columns for purifying high-quality RNA. The RNeasy Plus Universal Mini Kit can be automated on the QIAcube Connect. The RNeasy 96 Universal Tissue Kit enables total RNA purification in 96-well format from any tissue. Tissues are efficiently lysed and homogenized in QIAzol Lysis Reagent, and high-quality RNA is purified using silica-membrane RNeasy 96 plates. Manual purification is carried out using the QIAGEN Centrifuge 4-16KS and, optionally, the QIAvac 96 vacuum manifold. Automated purification using the related RNeasy 96 Universal Tissue 8000 Kit is performed on the BioRobot Universal System. Tissue samples can be conveniently stabilized using Allprotect Tissue Reagent, and efficiently disrupted using the TissueLyser II. Nonfatty tissues can be stabilized using the RNAprotect Tissue Reagent.
RNeasy Kits
RNeasy Kits are the gold standard for total RNA isolation. They provide fast purification of high-quality RNA from small to large amounts of cells, tissues, and yeast using silica membrane RNeasy spin columns or 96-well plates. Tissue samples can be conveniently stabilized using RNAprotect Tissue Reagent or Allprotect Tissue Reagent, and efficiently disrupted using a TissueRuptor II or TissueLyser II or LT system. The RNeasy 96 Kit enables high-throughput purification of total RNA from up to 96 cultured cell samples using silica membrane RNeasy 96 plates. A dedicated RNeasy QIAcube Kit enables automated purification of 1–12 samples on the QIAcube Connect...
Buffer RW1
Buffer RW1 is for washing membrane-bound RNA when following RNeasy and AllPrep procedures.
RNeasy Protect Animal Blood System
The RNeasy Protect Animal Blood System provides a complete solution for preparing high-quality RNA from animal blood. Blood from mouse, rat, and other small animals is conveniently collected in RNAprotect Animal Blood Tubes, which contain a reagent that immediately stabilizes cellular RNA. Total RNA is then purified using the RNeasy Protect Animal Blood Kit. Please note that the RNeasy Protect Animal Blood Kit and the RNAprotect Animal Blood Tubes are ordered separately.Alternatively, the RNeasy Protect Animal Blood Kit can be used to obtain microRNA (miRNA), either in a total RNA fraction or in a separate small RNA fraction. For purification of total RNA containing miRNA, Buffer RWT (cat. no. 1067933) is also required. For purification of small RNA (containing miRNA) and large RNA in 2 separate fractions, the RNeasy MinElute Cleanup Kit (cat. no. 74204) is also required. The procedures can be fully automated on the QIAcube Connect.
RNeasy Plus Kits
RNeasy Plus Kits are next generation QIAGEN RNA extraction kits, combining high-quality RNA purification with effective gDNA removal with unique gDNA Eliminator columns or plates. Total RNA of high purity and yield is obtained from a wide range of cultured cells and easy-to-lyse tissues. The RNeasy Plus Micro Kit is specially designed for limited amounts of samples and isolates up to 45 µg pure total RNA The RNeasy Plus Mini Kit purifies up to 100 µg total RNA (>200 nt) from a single extraction with efficient gDNA removal. Both kits can be automated on the QIAcube Connect and samples can be conveniently stabilized using RNAprotect Tissue Reagent or Allprotect Tissue Reagent and efficiently disrupted using a TissueRuptor II or TissueLyser II or LT system (available separately). The RNeasy Plus 96 Kit is for high-throughput purification of total RNA from cultured cells grown in 96-well plates.
RNeasy Protect Kits
RNeasy Protect Mini Kits enable stabilization of RNA in tissue samples, RNA and DNA in sorted or cultured cells, RNA in human saliva samples and RNA in bacterial samples. The RNeasy Protect Mini Kit and Bacteria Mini Kit include RNeasy spin columns for purifying up to 100 µg of high-quality RNA using silica-membrane technology. The RNeasy Protect Cell Mini Kit provides the RNeasy Plus Mini Kit for purification of total RNA. The RNeasy Protect Saliva Mini Kit includes the RNeasy Micro Kit, which purifies and concentrates total RNA using specialized RNeasy MinElute spin columns. The RNeasy Protect Mini, RNeasy Protect Cell Mini and RNeasy Protect Bacteria Mini Kits can be automated on the QIAcube Connect.
RNeasy FFPE Kit
The RNeasy FFPE Kit is specially designed for purifying total RNA from formalin-fixed, paraffin-embedded tissue sections. Special lysis and incubation conditions reverse formaldehye modification of RNA. In addition, the lysis buffer efficiently releases RNA from tissue sections while avoiding further RNA degradation. The kit also uses DNase and DNase Booster Buffer for optimized removal of genomic DNA contamination. RNeasy MinElute spin columns enable purification of total RNA with elution volumes of as low as 10 μl. Purification can be fully automated on the QIAcube Connect.
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RNeasy 96 BioRobot Kits
RNeasy 96 BioRobot Kits enable total RNA purification in 96-well format for BioRobot instruments from cultured cell samples and any tissue. Tissues are efficiently lysed and homogenized in QIAzol Lysis Reagent while cells are lyses in Buffer RLT. High-quality RNA is purified from tissues and cells using silica-membrane RNeasy 96 plates. Automated purification is performed using the BioRobot Universal System, which processes up to 96 or 192 samples per run followed by real-time RT-PCR setup. Tissue samples can be conveniently stabilized using Allprotect Tissue Reagent, and efficiently disrupted using the TissueLyser II. Nonfatty tissues can be stabilized using the RNAprotect Tissue Reagent.
RNeasy Plant Mini Kit
The RNeasy Plant Mini Kit includes QIAshredder spin columns for homogenizing and filtering viscous plant or fungal lysates, and RNeasy spin columns for purifying up to 100 μg of high-quality RNA using silica-membrane technology. Purification can be fully automated on the QIAcube Connect. The kit can also be used in combination with a TissueRuptor or TissueLyser system, which provide efficient disruption and homogenization of plant samples.
RNeasy MinElute Cleanup Kit
The RNeasy MinElute Cleanup Kit enables cleanup and concentration of RNA from enzymatic reactions or other samples using specialized RNeasy MinElute spin columns based on silica-membrane technology. The kit can also be used to desalt RNA samples. Up to 45 µg RNA can be purified in a volume as low as 10 µl. Purification can be fully automated on the QIAcube Connect.
RNeasy Fibrous Tissue Mini Kit
The RNeasy Fibrous Tissue Mini Kit includes proteinase K for removing abundant protein in fiber-rich tissue samples, and RNeasy spin columns for purifying up to 100 µg of high-quality RNA. The kit can be automated on the QIAcube Connect. Fibrous tissue samples can be conveniently stabilized using RNAprotect Tissue Reagent or Allprotect Tissue Reagent, and efficiently disrupted using a TissueRuptor or TissueLyser system. For larger samples, the RNeasy Fibrous Tissue Midi Kit (spin-column binding capacity of 1 mg RNA) is also available.
QIAwave RNA Mini Kit
The QIAwave RNA Mini Kit is an eco-friendlier version of our standard RNeasy Mini Kit. The kit uses up to 60% less plastic and up to 57% less cardboard than our standard kit and offers waste tubes made from 100% post-consumer recycled plastic that you can reuse throughout the procedure. QIAwave buffers also come as concentrates, reducing the amount of plastic by up to 90% per bottle. To save paper, there are no printed protocols in the kit. Instead, you can download the protocols you need from the resources list or by simply scanning the QR code inside the box lid. So, while the kit packaging and components of our QIAwave Kit may look different, it’s as easy to use as the RNeasy Mini Kit, and the chemistry and performance are identical.
Please be aware that you will need sterile glass bottles to store the reconstituted buffers.
In partnership with My Green Lab, we've also assessed the environmental impact of this kit. My Green Lab ACT (accountability, consistency, and transparency) environmental impact factor labels are designed to evaluate and score products on several sustainability criteria. These include:
Manufacturing
Responsible chemical management
Sustainable content within products and packaging materials
Disposal of the packaging at the end of life
Products are scored from 1 to 10 except for energy and water consumption, which are scored as 1 point per kWh or gallon, respectively. A low score means a lower environmental impact (see figures "QIAwave RNA Mini Kit ACT environmental impact factor label US 50/250, EU 50/250 and UK 50/250").
The QIAwave RNA Mini Kit offers you fast purification of high-quality RNA from cells, tissues, and yeast using silica-membrane RNeasy Mini Spin Columns. Before extraction, you can stabilize tissue samples using RNAprotect Tissue Reagent or Allprotect Tissue Reagent, and to efficiently homogenize your tissue samples, you can use the TissueRuptor II, TissueLyser III or LT system.
The QIAwave RNA Mini Kit can be automated on the QIAcube Connect using the RNeasy Mini Kit protocols.

