Pricing Availability Delivery Time Qty
Cat.No. 1955 - Ritanserin | C27H25F2N3OS | CAS No. 87051-43-2
Description: Potent 5-HT2 antagonist
Chemical Name: 6-[2-[4-[Bis(4-fluorophenyl)methylene]-1-piperidinyl]ethyl]-7-methyl-5H-thiazolo[3,2-a]pyrimidin-5-one
Purity: ≥99% (HPLC)
Citations (3)

Biological Activity

Potent and long-acting 5-HT2 receptor antagonist (Ki = 0.39 nM). Anxiolytic in vivo.

Compound Libraries

Ritanserin is also offered as part of the Tocriscreen Plus. Find out more about compound libraries available from Tocris.

Technical Data

M. Wt 477.57
Formula C27H25F2N3OS
Storage Store at +4°C
Purity ≥99% (HPLC)
CAS Number 87051-43-2
PubChem ID 5074
Smiles O=C1N3C(SC=C3)=NC(C)=C1CCN4CC/C(CC4)=C(C5=CC=C(F)C=C5)/C2=CC=C(F)C=C2

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

All Tocris products are intended for laboratory research use only.

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 47.76 100
ethanol 11.94 25

Preparing Stock Solutions

The following data is based on the product molecular weight 477.57. Batch specific molecular weights may vary from batch to batch due to solvent of hydration, which will affect the solvent volumes required to prepare stock solutions.

Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 2.09 mL 10.47 mL 20.94 mL
5 mM 0.42 mL 2.09 mL 4.19 mL
10 mM 0.21 mL 1.05 mL 2.09 mL
50 mM 0.04 mL 0.21 mL 0.42 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.

Product Datasheets

Certificate of Analysis / Product Datasheet
Select another batch:
Safety Datasheet


References are publications that support the products' biological activity.

Janssen (1985) Pharmacology of potent and selective S2-serotonergic antagonists. J.Cardiovasc.Pharmacol. 7 S2 PMID: 2412048

Leysen et al (1985) Receptor-binding properties in vitro and in vivo of ritanserin. Mol.Pharmacol. 27 600 PMID: 2860558

Watanabe et al (1992) Syntheses and 5-HT2 antagonist activity of bicyclic 1,2,4-triazol-3(2H)-one and 1,3,5-triazine-2,4(3H)-dione derivatives. J.Med.Chem. 35 189 PMID: 1732528

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

View Related Products by Target

View Related Products by Product Action

View all Non-selective 5-HT2 Antagonists

Keywords: Ritanserin, supplier, Potent, 5-HT2, antagonists, Non-Selective, Serotonin, Receptors, Non-selective, 5-HT2, Non-selective, 5-HT2, Tocris Bioscience

3 Citations for Ritanserin

Citations are publications that use Tocris products. Selected citations for Ritanserin include:

Mondal et al (2013) Mechanism of ghrelin-induced gastric contractions in Suncus murinus (house musk shrew): involvement of intrinsic primary afferent neurons. PLoS One 8 e60365 PMID: 23565235

Jahchan et al (2013) A drug repositioning approach identifies tricyclic antidepressants as inhibitors of small cell lung cancer and other neuroendocrine tumors. Cancer Discov 3 1364 PMID: 24078773

Bracha et al (2013) The expression and role of serotonin receptor 5HTR2A in canine osteoblasts and an osteosarcoma cell line. Physiol Behav 9 251 PMID: 24330646

Do you know of a great paper that uses Ritanserin from Tocris? If so please let us know.

Reviews for Ritanserin

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

Have you used Ritanserin?

Submit a review and receive an Amazon gift card.

$10US/$10CAN/€7/£6 gift card for a review without an image

$25US/$25CAN/€18/£15 gift card for a review with an image

*Offer only valid in the USA / Canada, UK and Europe

Submit a Review

Literature in this Area


GPCR Product Listing

A collection of over 450 products for G protein-coupled receptors, the listing includes research tools for the study of:

  • Rhodopsin-like Receptors
  • Secretin-like Receptors
  • Glutamate Receptors
  • Frizzled Receptors
  • GPCR Signaling
5-HT Receptors

5-HT Receptors Scientific Review

Written by Nicholas M. Barnes and John F. Neumaier, this review summarizes the various serotonin receptor subtypes and their importance in mediating the role of serotonin in numerous physiological and pharmacological processes. Compounds available from Tocris are listed.