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S1119-2 Contact for quotation ¥100
S1119-10 Contact for quotation ¥100


Indirubin-5-sulfonate is a cyclin-dependent kinase (CDK) inhibitor, with IC50 values of 55 nM, 35 nM, 150 nM, 300 nM and 65 nM for CDK1/cyclin B, CDK2/cyclin A, CDK2/cyclin E, CDK4/cyclin D1, and CDK5/p35, respectively. Indirubin-5-sulfonate also shows inhibitory activity against GSK-3β.

Product information

CAS Number: 244021-67-8

Molecular Weight: 342.33

Formula: C16H10N2O5S

Chemical Name: (E)-2', 3-dioxo-1', 2'-dihydro-1H, 3H-[2, 3'-biindolylidene]-5'-sulfonic acid

Smiles: OS(=O)(=O)C1=CC2/C(=C3\NC4=CC=CC=C4C\3=O)/C(=O)NC=2C=C1


InChi: InChI=1S/C16H10N2O5S/c19-15-9-3-1-2-4-11(9)17-14(15)13-10-7-8(24(21,22)23)5-6-12(10)18-16(13)20/h1-7,17H,(H,18,20)(H,21,22,23)/b14-13+

Technical Data

Appearance: Solid Power

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

Solubility: Soluble in DMSO

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200


  1. Hoessel R, et al. Indirubin, the active constituent of a Chinese antileukaemia medicine, inhibits cyclin-dependent kinases. Nat Cell Biol. 1999 May;1(1):60-7.
  2. Leclerc S, et al. Indirubins inhibit glycogen synthase kinase-3 beta and CDK5/p25, two protein kinases involved in abnormal tau phosphorylation in Alzheimer's disease. A property common to most cyclin-dependent kinase inhibitors? J Biol Chem. 2001 Jan 5;276(1):251-60.

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


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