Home Tools

BS-181 hydrochloride

Catalog No. T6162 CAS 1397219-81-6

Synonyms: BS-181 HCl

BS-181 hydrochloride (BS-181 HCl) is a highly selective CDK7 inhibitor with IC50 of 21 nM. It is more than 40-fold selective for CDK7 than CDK1, 2, 4, 5, 6, or 9.

All products from TargetMol are for Research Use Only. Not for Human or Veterinary or Therapeutic Use.

BS-181 hydrochloride, CAS 1397219-81-6

Pack Size	Availability	Price/USD
1 mg	In stock	$ 31.00
2 mg	In stock	$ 44.00
5 mg	In stock	$ 72.00
10 mg	In stock	$ 128.00
25 mg	In stock	$ 288.00
50 mg	In stock	$ 478.00
100 mg	In stock	$ 689.00
1 mL * 10 mM (in DMSO)	In stock	$ 79.00

Bulk Inquiry

Select Batch

Purity: 99.97%

Biological Description

Chemical Properties

Storage & Solubility Information

Description	BS-181 hydrochloride (BS-181 HCl) is a highly selective CDK7 inhibitor with IC50 of 21 nM. It is more than 40-fold selective for CDK7 than CDK1, 2, 4, 5, 6, or 9.
Targets&IC50	CDK7:21 nM
In vitro	BS-181 is a small molecule inhibitor of CDK7 in a cell-free environment, which displays more potential activity than roscovitine with IC 50 of 510 nM. Among the CDKs and other 69 kinases from many different classes, BS-181 shows high inhibitory selectivity for CDK7, inhibits CDK2 at concentrations lower than 1 μM which being inhibited 35-fold less potently (IC50 with 880 nM) than CDK7, shows slight inhibition for CDK1, CDK4, CDK5, CDK6 and CDK9 with IC50 values higher than 3.0 μM, and only shows inhibition for several kinases from other classes at high concentrations (>10 μM). BS-181 promotes cell cycle arrest and inhibits the cancer cell growth of a range of tumor types, including breast, lung, prostate and colorectal cancer with IC50 in the range of 11.5-37 μM. In MCF-7 cells, BS-181 inhibits the phosphorylation of the CDK7 substrate RNA polymerase II COOH-terminal domain (CTD), and promotes cell cycle arrest and apoptosis to inhibit the growth of cancer cell lines. [1]
In vivo	BS-181 is stable in vivo with a plasma elimination half-life in mice of 405 minutes after i.p. administration of 10 mg/kg. BS-181 inhibits the growth of MCF-7 xenografts in the nude mice model in a dose-dependent manner, with 25% and 50% reduction in tumor growth after 2 weeks of treatment at 10 mg/kg/day and 20 mg/kg/day, respectively without apparent toxicity. [1]
Kinase Assay	In vitro kinase inhibition.: Inhibition of CDK7 activity is measured by incubation of increasing amounts of BS-181 with purified recombinant CDK7/CycH/MAT1 complex, followed by measurement of free ATP remaining in the reaction using a luciferase assay, luciferase activity therefore providing a measure of inhibition of CDK7 activity for the determination of IC50.
Cell Research	MCF-7 cells are exposed to BS-181 for 24 hours. For the determination of cell cycle and apoptosis, cells are stained with propidium iodide or labeled with Annexin V-FITC, then labeled cells are acquired within 1 hour, by using the RXP cytomics software on a Beckman Coulter Elite ESP, and the data are analyzed using Flow Jo v7.2.5. For the assessment of CDKs, cells are lysed and analyzed by western blotting.(Only for Reference)

Synonyms	BS-181 HCl
Molecular Weight	416.99
Formula	C22H32N6·HCl
CAS No.	1397219-81-6

Storage

Powder: -20°C for 3 years | In solvent: -80°C for 1 year

Solubility Information

Ethanol: 22 mg/mL (52.75 mM), Heating is recommended.

H2O: 3 mg/mL (7.19 mM)

DMSO: 83 mg/mL (199.04 mM)

References and Literature

1. Ali S, et al. Cancer Res, 2009, 69(15), 6208-6215.

Related compound libraries

This product is contained In the following compound libraries：

Kinase Inhibitor Library Inhibitor Library Highly Selective Inhibitor Library Cell Cycle Compound Library Anti-Aging Compound Library NO PAINS Compound Library Anti-Pancreatic Cancer Compound Library Target-Focused Phenotypic Screening Library Anti-COVID-19 Compound Library Bioactive Compounds Library Max

Related Products

Related compounds with same targets

CAN508 Rafoxanide CDK9-IN-8 PF07104091 Tricin CKI-7 Indirubin-3′-oxime Ganoderic acid H

Dose Conversion

You can also refer to dose conversion for different animals. More

In vivo Formulation Calculator (Clear solution)

Step One: Enter information below

Dosage

mg/kg

Average weight of animals

Dosing volume per animal

Number of animals

Step Two: Enter the in vivo formulation

% DMSO+

% +

% Tween 80+

% ddH₂O

%DMSO+

Calculate Reset

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO (Master liquid concentration mg/mL)，Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation：Take μL DMSO master liquid, next add μL PEG300， mix and clarify, next add μL Tween 80，mix and clarify, next add μL ddH₂O, mix and clarify.

Note:

Be sure to add the solvent(s) in order. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.

Calculator

Molarity Calculator

Dilution Calculator

Reconstitution Calculation

Molecular Weight Calculator

Mass

Concentration

Volume

Molecular Weight

Molarity Calculator allows you to calculate the

Mass of a compound required to prepare a solution of known volume and concentration
Volume of solution required to dissolve a compound of known mass to a desired concentration
Concentration of a solution resulting from a known mass of compound in a specific volume

See Example

An example of a molarity calculation using the molarity calculator
What is the mass of compound required to make a 10 mM stock solution in 10 ml of water given that the molecular weight of the compound is 197.13 g/mol?
Enter 197.13 into the Molecular Weight (MW) box
Enter 10 into the Concentration box and select the correct unit (millimolar)
Enter 10 into the Volume box and select the correct unit (milliliter)
Press calculate
The answer of 19.713 mg appears in the Mass box

Concentration (Start)

Volume (Start)

Concentration (End)

Volume (End)

Calculator the dilution required to prepare a stock solution

Calculate the dilution required to prepare a stock solution
The dilution calculator is a useful tool which allows you to calculate how to dilute a stock solution of known concentration. Enter C1, C2 & V2 to calculate V1.

See Example

An example of a dilution calculation using the Tocris dilution calculator
What volume of a given 10 mM stock solution is required to make 20ml of a 50 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=50 μM, V2=20 ml and V1 is the unknown:
Enter 10 into the Concentration (start) box and select the correct unit (millimolar)
Enter 50 into the Concentration (final) box and select the correct unit (micromolar)
Enter 20 into the Volume (final) box and select the correct unit (milliliter)
Press calculate
The answer of 100 microliter (0.1 ml) appears in the Volume (start) box

Volume (to add to vial)

Mass (in vial)

Desired Reconstitution Concentration

Calculate the volume of solvent required to reconstitute your vial.

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.

Molecule Formula

Molecular Weight g/mol

Enter the chemical formula of a compound to calculate its molar mass and elemental composition

Tip: Chemical formula is case sensitive: C10H16N2O2 c10h16n2o2

Instructions to calculate molar mass (molecular weight) of a chemical compound:
To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed n the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

bottom

Tech Support

Please see Inhibitor Handling Instructions for more frequently ask questions. Topics include: how to prepare stock solutions, how to store products, and cautions on cell-based assays & animal experiments, etc.

Keywords

BS-181 hydrochloride 1397219-81-6 Cell Cycle/Checkpoint CDK BS181 Hydrochloride BS-181 BS181 Inhibitor inhibit BS-181 HCl BS 181 hydrochloride Cyclin dependent kinase BS 181 Hydrochloride BS-181 Hydrochloride BS 181 BS181 hydrochloride inhibitor

Products are chemical reagents for research use only and are not intended for human use. We do not sell to patients.