WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 318786

CAS#: 171596-29-5

Description: Tadalafil, also known as IC351, is PDE5 inhibitor marketed in pill form for treating erectile dysfunction (ED) under the name Cialis, and under the name Adcirca for the treatment of pulmonary arterial hypertension.

Price and Availability


USD 650
USD 2950

USD 1050
USD 4650

USD 1950
Ask price

Tadalafil, purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received. Delivery time: overnight (USA/Canada); 3-5 days (worldwide).

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 318786
Name: Tadalafil
CAS#: 171596-29-5
Chemical Formula: C22H19N3O4
Exact Mass: 389.1376
Molecular Weight: 389.411
Elemental Analysis: C, 67.86; H, 4.92; N, 10.79; O, 16.43

Synonym: IC351, IC-351, IC 351, Tadalafil, Adcirca, Cialis

IUPAC/Chemical Name: (6R,12aR)-6-(benzo[d][1,3]dioxol-5-yl)-2-methyl-2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione


InChi Code: InChI=1S/C22H19N3O4/c1-24-10-19(26)25-16(22(24)27)9-14-13-4-2-3-5-15(13)23-20(14)21(25)12-6-7-17-18(8-12)29-11-28-17/h2-8,16,21,23H,9-11H2,1H3/t16-,21-/m1/s1

SMILES Code: O=C([C@@]1([H])CC2=C([C@@H](C3=CC(OCO4)=C4C=C3)N15)NC6=C2C=CC=C6)N(C)CC5=O

Technical Data

White solid powder

>98% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO, not in water

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

Harmonized System Code:


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2: Yokoyama O, Igawa Y, Takeda M, Yamaguchi T, Murakami M, Viktrup L. Tadalafil for lower urinary tract symptoms secondary to benign prostatic hyperplasia: a review of clinical data in Asian men and an update on the mechanism of action. Ther Adv Urol. 2015 Oct;7(5):249-64. doi: 10.1177/1756287215589238. Review. PubMed PMID: 26425140; PubMed Central PMCID: PMC4549700.

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4: Elkelany OO, Owen RC, Kim ED. Combination of tadalafil and finasteride for improving the symptoms of benign prostatic hyperplasia: critical appraisal and patient focus. Ther Clin Risk Manag. 2015 Mar 30;11:507-13. doi: 10.2147/TCRM.S80353. eCollection 2015. Review. PubMed PMID: 25848297; PubMed Central PMCID: PMC4386768.

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6: Hatzimouratidis K. A review of the use of tadalafil in the treatment of benign prostatic hyperplasia in men with and without erectile dysfunction. Ther Adv Urol. 2014 Aug;6(4):135-47. doi: 10.1177/1756287214531639. Review. PubMed PMID: 25083163; PubMed Central PMCID: PMC4054509.

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8: Tadalafil and benign prostatic hypertrophy. Too risky. Prescrire Int. 2014 Apr;23(148):96. Review. PubMed PMID: 24860894.

9: Park HJ, Won JE, Sorsaburu S, Rivera PD, Lee SW. Urinary Tract Symptoms (LUTS) Secondary to Benign Prostatic Hyperplasia (BPH) and LUTS/BPH with Erectile Dysfunction in Asian Men: A Systematic Review Focusing on Tadalafil. World J Mens Health. 2013 Dec;31(3):193-207. doi: 10.5534/wjmh.2013.31.3.193. Epub 2013 Dec 24. Review. PubMed PMID: 24459652; PubMed Central PMCID: PMC3888888.

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13: Yuan RQ. [Tadalafil for lower urinary tract symptoms secondary to benign prostatic hyperplasia]. Zhonghua Nan Ke Xue. 2012 Dec;18(12):1147-51. Review. Chinese. PubMed PMID: 23405801.

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15: Udeoji DU, Schwarz ER. Tadalafil as monotherapy and in combination regimens for the treatment of pulmonary arterial hypertension. Ther Adv Respir Dis. 2013 Feb;7(1):39-49. doi: 10.1177/1753465812463627. Epub 2012 Nov 5. Review. PubMed PMID: 23129569.

16: Curran MP. Tadalafil: in the treatment of signs and symptoms of benign prostatic hyperplasia with or without erectile dysfunction. Drugs Aging. 2012 Sep;29(9):771-81. Review. PubMed PMID: 23018613.

17: Porst H, Hell-Momeni K, Büttner H. Chronic PDE-5 inhibition in patients with erectile dysfunction - a treatment approach using tadalafil once-daily. Expert Opin Pharmacother. 2012 Jul;13(10):1481-94. doi: 10.1517/14656566.2012.693162. Review. PubMed PMID: 22725705.

18: Venhuis BJ, de Kaste D. Towards a decade of detecting new analogues of sildenafil, tadalafil and vardenafil in food supplements: a history, analytical aspects and health risks. J Pharm Biomed Anal. 2012 Oct;69:196-208. doi: 10.1016/j.jpba.2012.02.014. Epub 2012 Mar 8. Review. PubMed PMID: 22464558.

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20: Gordon-Bennett P, Rimmer T. Central serous chorioretinopathy following oral tadalafil. Eye (Lond). 2012 Jan;26(1):168-9. doi: 10.1038/eye.2011.250. Epub 2011 Nov 4. Review. PubMed PMID: 22056864; PubMed Central PMCID: PMC3259586.