Date published: 2026-4-23

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Silybin (CAS 22888-70-6)

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Alternate Names:
Silibinin; 2,3-Dihydro-3-(4-hydroxy-3-methoxyphenyl)-2-(hydroxymethyl)-6-(3,5,7-trihydroxy-4-oxobenzopyran-2-yl)benzodioxin; Silymarin
Application:
Silybin is a major active constituent of silymarin which inhibits mitogen-activated protein kinase (MAPK)
CAS Number:
22888-70-6
Purity:
>98%
Molecular Weight:
482.44
Molecular Formula:
C25H22O10
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Silybin is an inhibitor of a wide variety of proteins, many of which are heavily involved in xenobiotic efflux and metabolism. Silybin is an inhibitor of P-glycoprotein-mediated cellular efflux and also inhibits xenobiotic oxidation by the CYP (cytochrome P450) superfamily of enzymes. This helps to contribute the apoptotic activity of this compound, which may act to be effective against a wide variety of cancer cell lines. Silybin is an inhibitor of 5-LO.


Silybin (CAS 22888-70-6) References

  1. Biotransformation of silybin and its congeners.  |  Křen, V., et al. 2013. Curr Drug Metab. 14: 1009-21. PMID: 24261705
  2. Silybin reduces obliterated retinal capillaries in experimental diabetic retinopathy in rats.  |  Zhang, HT., et al. 2014. Eur J Pharmacol. 740: 233-9. PMID: 25066112
  3. Silybin inhibits NLRP3 inflammasome assembly through the NAD+/SIRT2 pathway in mice with nonalcoholic fatty liver disease.  |  Zhang, B., et al. 2018. FASEB J. 32: 757-767. PMID: 28970254
  4. Silybin Alleviates Hepatic Steatosis and Fibrosis in NASH Mice by Inhibiting Oxidative Stress and Involvement with the Nf-κB Pathway.  |  Ou, Q., et al. 2018. Dig Dis Sci. 63: 3398-3408. PMID: 30191499
  5. Silybin ameliorates hepatic lipid accumulation and modulates global metabolism in an NAFLD mouse model.  |  Sun, R., et al. 2020. Biomed Pharmacother. 123: 109721. PMID: 31865143
  6. Silybin enhances the blood concentration of brexpiprazole in rats by downregulating expression of CYP3A4 and CYP2D6.  |  Yu, C., et al. 2020. Pharmazie. 75: 198-200. PMID: 32393428
  7. Silybin alleviates hepatic lipid accumulation in methionine-choline deficient diet-induced nonalcoholic fatty liver disease in mice via peroxisome proliferator-activated receptor α.  |  Cui, S., et al. 2021. Chin J Nat Med. 19: 401-411. PMID: 34092291
  8. Effects of silybin supplementation on nutrient digestibility, hematological parameters, liver function indices, and liver-specific mi-RNA concentration in dogs.  |  Gogulski, M., et al. 2021. BMC Vet Res. 17: 228. PMID: 34174886
  9. Silybin Restored CYP3A Expression through the Sirtuin 2/Nuclear Factor κ-B Pathway in Mouse Nonalcoholic Fatty Liver Disease.  |  Zhang, R., et al. 2021. Drug Metab Dispos. 49: 770-779. PMID: 34183378
  10. Chirality Matters: Biological Activity of Optically Pure Silybin and Its Congeners.  |  Křen, V. 2021. Int J Mol Sci. 22: PMID: 34360650
  11. Silybin B exerts protective effect on cisplatin-induced neurotoxicity by alleviating DNA damage and apoptosis.  |  Wang, XL., et al. 2022. J Ethnopharmacol. 288: 114938. PMID: 34999144
  12. Silybin phytosome attenuates cerebral ischemia-reperfusion injury in rats by suppressing oxidative stress and reducing inflammatory response: In vivo and in silico approaches.  |  Pasala, PK., et al. 2022. J Biochem Mol Toxicol. 36: e23073. PMID: 35437840
  13. Silybin suppresses ovarian cancer cell proliferation by inhibiting isocitrate dehydrogenase 1 activity.  |  Wei, Z., et al. 2022. Cancer Sci. 113: 3032-3043. PMID: 35730256
  14. Silybin induces endothelium-dependent vasodilation via TRPV4 channels in mouse mesenteric arteries.  |  Wen, X., et al. 2022. Hypertens Res. 45: 1954-1963. PMID: 36056206
  15. [On the pharmacology and toxicology of silymarin, an antihepatotoxic active principle from Silybum marianum (L.) Gaertn].  |  Hahn, G., et al. 1968. Arzneimittelforschung. 18: 698-704. PMID: 5755807

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Silybin, 1 g

sc-202812
1 g
$55.00

Silybin, 5 g

sc-202812A
5 g
$114.00

Silybin, 10 g

sc-202812B
10 g
$206.00

Silybin, 50 g

sc-202812C
50 g
$714.00

Hi, is this silybin a mix of silybin A and B? Thank you, Klaus

Asked by: kt_dsm
Thank you for your question. This product is supplied as a mixture of A and B diastereomers. Quantities of either diastereomer are not determined.
Answered by: Tech Support Europe
Date published: 2025-02-20
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Rated 5 out of 5 by from SinghSingh, et. al. (PubMed ID 17916909) found that treating nude mice before and/or after of human prostate carcinoma PC-3 tumor xenograft implantation inhibited the tumor growth rate; showing a decrease in tumor volume and tumor weight (per mouse). -SCBT Publication Review
Date published: 2015-03-01
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Silybin is rated 5.0 out of 5 by 1.
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