Date published: 2026-6-9

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Ketotifen fumarate (CAS 34580-14-8)

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CAS Number:
34580-14-8
Purity:
≥98%
Molecular Weight:
425.5
Molecular Formula:
C19H19NOS•C4H4O4
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Ketotifen fumarate, a Histamine H1 receptor antagonist, has been noted to inhibit histamine release from lymphocytes and monocytes at 0.1-10 muM. Ketotifen has demonstrated inhibiting characteristics against mast cell growth, therefore reducing myofibroblast hyperplasia. This compound has displayed induction capacities in primary necrosis of interleukin-5-treated eosinophils. Ketotifen fumarate is an inhibitor of PDE.


Ketotifen fumarate (CAS 34580-14-8) References

  1. Effect of ketotifen fumarate, olopatadine, and levocabastine on ocular active anaphylaxis in the guinea pig and ocular immediate hypersensitivity in the albino rat.  |  Schoch, C. 2005. Ocul Immunol Inflamm. 13: 39-44. PMID: 15804768
  2. Ketotifen induces primary necrosis of human eosinophils.  |  Hasala, H., et al. 2005. J Ocul Pharmacol Ther. 21: 318-27. PMID: 16117696
  3. The sorption of ketotifen fumarate by chitosan.  |  Alkhamis, KA., et al. 2008. AAPS PharmSciTech. 9: 866-9. PMID: 18651226
  4. The mast cell stabilizer ketotifen fumarate lessens contracture severity and myofibroblast hyperplasia: a study of a rabbit model of posttraumatic joint contractures.  |  Monument, MJ., et al. 2010. J Bone Joint Surg Am. 92: 1468-77. PMID: 20516323
  5. Ketotifen Fumarate and Salbutamol Sulphate Combined Transdermal Patch Formulations: In vitro release and Ex vivo Permeation Studies.  |  Yousuf, M., et al. 2013. Indian J Pharm Sci. 75: 569-77. PMID: 24403658
  6. Topical Olopatadine Hydrochloride versus Ketotifen Fumarate for Allergic Conjunctivitis.  |  Patel, D., et al. 2018. J Ophthalmic Vis Res. 13: 119-123. PMID: 29719638
  7. Ketotifen fumarate attenuates feline gingivitis related with gingival microenvironment modulation.  |  Yuan, W., et al. 2018. Int Immunopharmacol. 65: 159-173. PMID: 30316074
  8. Effect of ketotifen fumarate on experimental autoimmune orchitis and torsion of the spermatic cord.  |  Moreno, D., et al. 2020. Asian J Androl. 22: 112-117. PMID: 31115365
  9. Combination treatment of allergic rhinitis using ketotifen fumarate and budesonide administered as nasal sprays
.  |  Wang, SZ., et al. 2020. Int J Clin Pharmacol Ther. 58: 195-197. PMID: 32068532
  10. Mast cell stabilizer ketotifen fumarate reverses inflammatory but not neuropathic-induced mechanical pain in mice.  |  Meloto, CB., et al. 2021. Pain Rep. 6: e902. PMID: 34104835
  11. Topical Ketotifen Fumarate Inhibits Choroidal Mast Cell Degranulation and Loss of Retinal Pigment Epithelial Cells in Rat Model for Geographic Atrophy.  |  Nizawa, T., et al. 2021. Transl Vis Sci Technol. 10: 37. PMID: 34967831
  12. Mechanism of ketotifen fumarate inhibiting renal calcium oxalate stone formation in SD rats.  |  Huang, Z., et al. 2022. Biomed Pharmacother. 151: 113147. PMID: 35643070
  13. Use of Ketotifen Fumarate-Eluting Daily Disposable Soft Contact Lens in Management of Ocular Allergy: Literature Review and Report of Two Cases.  |  Ono, J. and Toshida, H. 2022. Cureus. 14: e27093. PMID: 36000122
  14. Determining initial ocular comfort differences between 0.7% olopatadine and 0.035% ketotifen fumarate.  |  Logan, A., et al. 2023. Cont Lens Anterior Eye. 46: 101769. PMID: 36195538
  15. Comparison of anti-allergic activities of the histamine H1 receptor antagonists epinastine, ketotifen and oxatomide in human leukocytes.  |  Mita, H. and Shida, T. 1995. Arzneimittelforschung. 45: 36-40. PMID: 7893266

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Ketotifen fumarate, 100 mg

sc-201094A
100 mg
$46.00

Ketotifen fumarate, 1 g

sc-201094
1 g
$73.00