Vonoprazan free base

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MedKoo CAT#: 526560

CAS#: 881681-00-1 (free base)

Description: Vonoprazan is a novel potassium-competitive acid blocker. Vonoprazan is a first-in-class potassium-competitive acid blocker. It was approved in the Japanese market in February 2015. Vonoprazan can be used for the treatment of gastroduodenal ulcer (including some drug-induced peptic ulcers) and reflux esophagitis, and can be combined with antibiotics for the eradication of Helicobacter pylori.

Price and Availability

Size Price Shipping out time Quantity
1g USD 150 2 Weeks
2g USD 250 2 Weeks
5g USD 450 2 Weeks
10g USD 750 2 Weeks
25g USD 1250 2 Weeks
50g USD 2650 2 Weeks
100g USD 4250 2 Weeks
200g USD 6950 2 Weeks
500g USD 12950 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2020-10-29. Prices are subject to change without notice.

Vonoprazan free base, 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#: 526560
Name: Vonoprazan free base
CAS#: 881681-00-1 (free base)
Chemical Formula: C17H16FN3O2S
Exact Mass: 345.0947
Molecular Weight: 345.39
Elemental Analysis: C, 59.12; H, 4.67; F, 5.50; N, 12.17; O, 9.26; S, 9.28

Related CAS #: 881681-00-1 (free base)   1260141-27-2 (fumarate)   1260141-27-2  

Synonym: Vonoprazan, TAK-438, TAK 438, TAK438

IUPAC/Chemical Name: 1-(5-(2-Fluorophenyl)-1-(pyridine-3-sulfonyl)-1H-pyrrol-3-yl)-N-methylmethanamine


InChi Code: InChI=1S/C17H16FN3O2S/c1-19-10-13-9-17(15-6-2-3-7-16(15)18)21(12-13)24(22,23)14-5-4-8-20-11-14/h2-9,11-12,19H,10H2,1H3


Technical Data

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

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).

HS Tariff Code:


1: Yamasaki H, Kawaguchi N, Nonaka M, Takahashi J, Morohashi A, Hirabayashi H, Moriwaki T, Asahi S. In vitro metabolism of TAK-438, vonoprazan fumarate, a novel potassium-competitive acid blocker. Xenobiotica. 2016 Jul 14:1-8. [Epub ahead of print] PubMed PMID: 27414183.

2: Otake K, Sakurai Y, Nishida H, Fukui H, Tagawa Y, Yamasaki H, Karashima M, Otsuka K, Inatomi N. Characteristics of the Novel Potassium-Competitive Acid Blocker Vonoprazan Fumarate (TAK-438). Adv Ther. 2016 Jul;33(7):1140-57. doi: 10.1007/s12325-016-0345-2. Review. PubMed PMID: 27287852.

3: Kogame A, Takeuchi T, Nonaka M, Yamasaki H, Kawaguchi N, Bernards A, Tagawa Y, Morohashi A, Kondo T, Moriwaki T, Asahi S. Disposition and metabolism of TAK-438 (vonoprazan fumarate), a novel potassium-competitive acid blocker, in rats and dogs. Xenobiotica. 2016 May 26:1-12. [Epub ahead of print] PubMed PMID: 27225050.

4: Matsukawa J, Kogame A, Tagawa Y, Inatomi N. Radiographic Localization Study of a Novel Potassium-Competitive Acid Blocker, Vonoprazan, in the Rat Gastric Mucosa. Dig Dis Sci. 2016 Jul;61(7):1888-94. doi: 10.1007/s10620-016-4100-y. PubMed PMID: 26961787.

5: Yoneyama T, Teshima K, Jinno F, Kondo T, Asahi S. A validated simultaneous quantification method for vonoprazan (TAK-438F) and its 4 metabolites in human plasma by the liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci. 2016 Mar 15;1015-1016:42-9. doi: 10.1016/j.jchromb.2016.01.051. PubMed PMID: 26896571.

6: Liu L, Cao N, Ma X, Xiong K, Sun L, Zou Q. Identification, characterization, and high-performance liquid chromatography quantification of process-related impurities in vonoprazan fumarate. J Sep Sci. 2016 Apr;39(7):1232-41. doi: 10.1002/jssc.201501154. PubMed PMID: 26843471.

7: Matsukawa J, Inatomi N, Otake K. [Pharmacological and clinical profiles of a novel potassium-competitive acid blocker, vonoprazan fumarate (Takecab(®) 10 mg and 20 mg)]. Nihon Yakurigaku Zasshi. 2015 Nov;146(5):275-82. doi: 10.1254/fpj.146.275. Review. Japanese. PubMed PMID: 26558313.

8: Echizen H. The First-in-Class Potassium-Competitive Acid Blocker, Vonoprazan Fumarate: Pharmacokinetic and Pharmacodynamic Considerations. Clin Pharmacokinet. 2016 Apr;55(4):409-18. doi: 10.1007/s40262-015-0326-7. Review. PubMed PMID: 26369775.

9: Arikawa Y, Nishida H, Kurasawa O, Hasuoka A, Hirase K, Inatomi N, Hori Y, Matsukawa J, Imanishi A, Kondo M, Tarui N, Hamada T, Takagi T, Takeuchi T, Kajino M. Discovery of a novel pyrrole derivative 1-[5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl]-N-methylmethanamin e fumarate (TAK-438) as a potassium-competitive acid blocker (P-CAB). J Med Chem. 2012 May 10;55(9):4446-56. doi: 10.1021/jm300318t. PubMed PMID: 22512618.