SKI 178

Pricing Availability   Qty
Cat.No. 5452 - SKI 178 | C21H22N4O4 | CAS No. 1259484-97-3
Description: Non-lipid sphingosine kinase 1 (SphK1) inhibitor
Chemical Name: N'-(1-(3,4-Dimethoxyphenyl)ethylidene)-3-(4-methoxyphenyl)-1H-pyrazole-5-carbohydrazide
Purity: ≥98% (HPLC)
Literature (2)

Biological Activity

Non-lipid sphingosine kinase 1 (SphK1) inhibitor (IC50 = 0.1-1.8 μM). Induces CDK1-dependent apoptosis in human acute myeloid leukemia cell lines. Active in vivo.

Technical Data

M. Wt 394.42
Formula C21H22N4O4
Storage Store at -20°C
Purity ≥98% (HPLC)
CAS Number 1259484-97-3
PubChem ID 5342941
Smiles O=C(N/N=C(C)/C1=CC=C(OC)C(OC)=C1)C2=CC(C3=CC=C(OC)C=C3)=NN2

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

Tocris products are intended for laboratory research use only, unless stated otherwise.

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 39.44 100

Preparing Stock Solutions

The following data is based on the product molecular weight 394.42. Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Select a batch to recalculate based on the batch molecular weight:
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 2.54 mL 12.68 mL 25.35 mL
5 mM 0.51 mL 2.54 mL 5.07 mL
10 mM 0.25 mL 1.27 mL 2.54 mL
50 mM 0.05 mL 0.25 mL 0.51 mL

Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Dilution Calculator

Calculate the dilution required to prepare a stock solution.


References are publications that support the biological activity of the product.

Dick et al (2015) The apoptotic mechanism of action of the sphingosine kinase 1 selective inhibitor SKI-178 in human acute myeloid leukemia cell lines. J.Pharmacol.Exp.Ther. 352 494 PMID: 25563902

Hengst et al (2010) Development of a sphingosine kinase 1 specific small-molecule inhibitor. Bioorg.Med.Chem.Lett. 20 7498 PMID: 21050755

If you know of a relevant reference for SKI 178, please let us know.

View Related Products by Target

View Related Products by Product Action

View all Sphingosine Kinase Inhibitors

Keywords: SKI 178, SKI 178 supplier, SKI178, Inhibitors, Inhibits, Sphingosine, kinase, 1, SphK1, Kinase, 5452, Tocris Bioscience

Citations for SKI 178

Citations are publications that use Tocris products.

Currently there are no citations for SKI 178. Do you know of a great paper that uses SKI 178 from Tocris? Please let us know.

Reviews for SKI 178

There are currently no reviews for this product. Be the first to review SKI 178 and earn rewards!

Have you used SKI 178?

Submit a review and receive an Amazon gift card.

$50/€35/£30/$50CAN/¥300 Yuan/¥5000 Yen for first to review with an image

$25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

$10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit a Review

Literature in this Area

Tocris offers the following scientific literature in this area to showcase our products. We invite you to request* or download your copy today!

*Please note that Tocris will only send literature to established scientific business / institute addresses.


Cancer Research Product Guide

A collection of over 750 products for cancer research, the guide includes research tools for the study of:

  • Cancer Metabolism
  • Epigenetics in Cancer
  • Receptor Signaling
  • Cell Cycle and DNA Damage Repair
  • Angiogenesis
  • Invasion and Metastasis

Kinases Product Listing

A collection of over 400 products for kinase research, the listing includes inhibitors of:

  • Receptor Tyrosine Kinases
  • Protein Kinases A, C, D and G
  • PI-3 Kinase, Akt and mTOR
  • MAPK Signaling
  • Receptor Serine/Threonine Kinases