Riamilovir sodium hydrate

Catalog No. size PriceQuantity
M7015-2 2mg solid $91
M7015-10 10mg solid $360


Cas:928659-17-0 (sodium hydrate)

Product Information

Riamilovir, also known as Triazavirin, is an antiviral drug candidate. Tiazavirin is a broad-spectrum antiviral drug developed in Russia. It has a novel triazolotriazine core, which represents a new structural class of non-nucleoside antiviral drugs. It was originally developed as a potential treatment for pandemic influenza strains such as H5N1, and most of the testing that has been done has focused on its anti-influenza activity. However triazavirin has also been found to have antiviral activity against a number of other viruses including Tick-borne encephalitis virus, and Forest-Spring Encephalitis virus, and is also being investigated for potential application against Lassa fever and Ebola virus disease. In February 2020, testing of triazavirin was started against SARS-CoV-2.


Chemical Formula: C5H8N6Na2O5S


Molecular Weight: 310.1955


Elemental Analysis: C, 19.36; H, 2.60; N, 27.09; Na, 14.82; O, 25.79; S, 10.34




Riamilovir sodium hydrate





Chemical Name: 7-(Methylthio)-3-nitro-[1,2,4]triazolo[5,1-c][1,2,4]triazin-4(6H)-one sodium sodium dihydrate


InChi Key:



InChi Code: InChI=1S/C5H4N6O3S.2Na.2H2O/c1-15-5-6-4-8-7-2(11(13)14)3(12)10(4)9-5;;;;/h1H3,(H,6,8,9);;;2*1H2


Smiles Code:




Technical Data:


Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >3 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001


In Vitro:

The efficacy of Triazavirin against the tick-borne encephalitis virus is estimated in the sensitive cell culture. In a concentration of 128 mcg/mL Triazavirin is shown active in inhibition of the tick-borne encephalitis virus reproduction (strain Sofiin) by accumulation in the SKEV cell culture.


In Vivo:

The therapeutic efficacy Triazavirin against experimental Forest-Spring encephalitis on albino mice is studied. The results shows that in high doses (200-400 mg/kg) Triazavirin moderately protects the infected animals. A significant increase of the animal lifespan in the test groups (from 4.1 to 4.8 days) and a statistically valid decrease of the virus accumulation in the target organ are observed.





  1. Wu X, Yu K, Wang Y, Xu W, Ma H, Hou Y, Li Y, Cai B, Zhu L, Zhang M, Hu X, Gao J, Wang Y, Qin H, Wang W, Zhao M, Wu X, Zhang Y, Li L, Li K, Du Z, Mol BWJ, Yang B. Efficacy and safety of triazavirin therapy for coronavirus disease 2019: A pilot randomized controlled trial. Engineering (Beijing). 2020 Sep 8. doi: 10.1016/j.eng.2020.08.011. Epub ahead of print. PMID: 32923016; PMCID: PMC7476906.


  1. Wu X, Yu K, Wang Y, Xu W, Ma H, Hou Y, Li Y, Cai B, Zhu L, Zhang M, Hu X, Gao J, Wang Y, Qin H, Zhao M, Zhang Y, Li K, Du Z, Yang B. The Efficacy and Safety of Triazavirin for COVID-19: A Trial Protocol. Engineering (Beijing). 2020 Jul 3. doi: 10.1016/j.eng.2020.06.011. Epub ahead of print. PMID: 32837750; PMCID: PMC7332434.


  1. Shahab S, Sheikhi M. Triazavirin - Potential inhibitor for 2019-nCoV Coronavirus M protease: A DFT study. Curr Mol Med. 2020 May 20. doi: 10.2174/1566524020666200521075848. Epub ahead of print. PMID: 32436829.


  1. Zabrodskaya YA, Shvetsov AV, Tsvetkov VB, Egorov VV. A double-edged sword: supramolecular complexes of triazavirine display multicenter binding effects which influence aggregate formation. J Biomol Struct Dyn. 2019 Aug;37(12):3041-3047. doi: 10.1080/07391102.2018.1507837. Epub 2018 Nov 15. PMID: 30073907.


  1. Shvetsov AV, Zabrodskaya YA, Nekrasov PA, Egorov VV. Triazavirine supramolecular complexes as modifiers of the peptide oligomeric structure. J Biomol Struct Dyn. 2018 Aug;36(10):2694-2698. doi: 10.1080/07391102.2017.1367329. Epub 2017 Sep 12. PMID: 28828928.


Products are for research use only. Not for human use.

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