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TRI Reagent®

For processing tissues, cells cultured in monolayer or cell pellets

TRI Reagent RNA Isolation Reagent
MDL number:

Quality Level


1 mL sufficient for 107 cells
1 mL sufficient for 100 mg tissue (or)

storage temp.


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General description

TRI reagent® is a quick and convenient ready-to-use reagent useful for efficient total RNA extraction or for the simultaneous isolation of RNA, DNA and protein. TRI reagent® is a mixture of guanidine thiocyanate and phenol in a monophasic solution.
Homogenization or lysis of the tissue sample in TRI reagent® dissolves RNA, DNA and protein. The addition of chloroform or 1-bromo-3-chloropropane followed by centrifugation results in the separation of the mixture into three phases: an aqueous phase containing the RNA, the interphase containing DNA, and an organic phase containing proteins. Each of the components can then be isolated after separating the phases.


TRI Reagent has been used:
  • in the isolation of total RNA from various tissue samples and cells
  • for the lysis of monocytes
  • to isolate cytoplasmic RNA from SARS-CoV infected Vero cells
  • to isolate total RNA from MDMs (monocyte-derived macrophages) infected with influenza A (H5N1) virus
  • to prepare a viral lysate of SARS-CoV culture for the creation of a clone encoding the S glycoprotein in the development of SARS-CoV vaccine

The RNA, DNA and protein that are isolated using TRI reagent® can further be used for downstream applications, such as cloning, PCR, RT-PCR, Northern blots, mRNA isolation, in vitro translation, RNase protection assay, restriction enzyme digestion, Southern blots, SDS-PAGE and western blots.
TRI Reagent is an improved version of the single-step total RNA isolation reagent developed by Chomczynski. The RNA isolation method based on this reagent is widely used and proven for RNA applications. It is ideal for quick, economical, and efficient isolation of total RNA or the simultaneous isolation of RNA, DNA, and proteins from samples of human, animal, plant, yeast, bacterial, and viral origin.


25, 100, 200 mL in glass bottle

Features and Benefits

Easy-to-use: A single reagent that can be used for RNA, DNA and protein isolation that is free of any contamination.
Multi-purpose: TRI Reagent® performs well with large or small amounts of tissue or cells and works with many samples including human, plant, yeast, bacterial and viral samples.
Efficient: TRI reagent® gives better yields than traditional guanidine thiocyanate/cesium chloride methods. The whole process of RNA extraction starting with fresh tissue or cells can be completed in less than one hour.
  • Easily scalable RNA isolation
  • Works with many sources: human, plant, yeast, bacterial, or viral
  • Better yields than traditional guanidine thiocyanate/cesium chloride methods

Legal Information

TRI Reagent is a registered trademark of Molecular Research Center, Inc.

Signal Word


Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Muta. 2 - Skin Corr. 1B - STOT RE 2

Supplementary Hazards

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials



Flash Point(F)

174.2 °F - closed cup

Flash Point(C)

79 °C - closed cup

Certificate of Analysis

Certificate of Origin

  1. My cells are plated on polystyrene culture plates. How do I use Product T9424, TRI Reagent in this application?

    We recommend harvesting the cells in PBS with a rubber policeman/cell scraper, transfer to an eppendorf tube, and proceed with the RNA isolation by removing the PBS from the cell pellet and re-suspending the pellet in the Tri Reagent.

  2. If I add a volume of Product T9424, Tri Reagent, different from 1 ml, how much chloroform and isopropanol should I add?

    What is important is to keep the ratio the same. For example, we recommend adding 200 μL of chloroform and 500 μL of isopropanol when using 1 ml of Tri Reagent. Therefore, 100 μL of chloroform and 250 μL of isopropanol would be added if using 500 μL of Tri Reagent. Similarly, 300 μL of chloroform and 750 μL of isopropanol would be added to if using 1.5 ml of Tri Reagent.

  3. What is the expiration date for Product T9424, Tri Reagent?  

    The expiration date for T9424 has not been established. However, based on our storage guidelines, it should be usable for 1 year from the date of receipt.

  4. Can I use T9424 Tri Reagent for blood samples?

    No, we recommend using T3809 Tri Reagent BD for work in blood samples.

  5. Which chloroform and isopropanol do you recommend to be used with T9424, Tri Reagent?

    For chloroform and isopropanol we recommend C2432 and I9616, respectively.

  6. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  7. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  8. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  9. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  10. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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