Niraparib tosylate hydrate

Orders received during 11/25~11/29 will be shipped in 11/30/2020 due to Thanksgiving holiday.

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

MedKoo CAT#: 330234

CAS#: 1613220-15-7 (tosylate hydrate)

Description: Niraparib, also know as MK-4827, is an inhibitor of poly (ADP-ribose) polymerase (PARP) with potential antineoplastic activity. MK4827 inhibits PARP activity, enhancing the accumulation of DNA strand breaks and promoting genomic instability and apoptosis. The PARP family of proteins detect and repair single strand DNA breaks by the base-excision repair (BER) pathway.

Price and Availability

Size Price Shipping out time Quantity
200mg USD 450 2 Weeks
500mg USD 850 2 Weeks
1g USD 1450 2 Weeks
2g USD 2450 2 Weeks
5g USD 5850 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2020-11-30. Prices are subject to change without notice.

Niraparib tosylate hydrate, 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.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 330234
Name: Niraparib tosylate hydrate
CAS#: 1613220-15-7 (tosylate hydrate)
Chemical Formula: C26H30N4O5S
Exact Mass:
Molecular Weight: 510.609
Elemental Analysis: C, 61.16; H, 5.92; N, 10.97; O, 15.67; S, 6.28

Related CAS #: 1038915-73-9 (tosylate)   1038915-60-4 (free base)   1038915-64-8 (HCl)   1613220-15-7 (tosylate hydrate)   1038915-58-0    

Synonym: Niraparib tosylate hydrate; MK-4827; MK-4827; MK4827; MK4827-tosylate; Niraparib tosylate;

IUPAC/Chemical Name: (S)-2-(4-(piperidin-3-yl)phenyl)-2H-indazole-7-carboxamide 4-methylbenzenesulfonate hydrate


InChi Code: InChI=1S/C19H20N4O.C7H8O3S.H2O/c20-19(24)17-5-1-3-15-12-23(22-18(15)17)16-8-6-13(7-9-16)14-4-2-10-21-11-14;1-6-2-4-7(5-3-6)11(8,9)10;/h1,3,5-9,12,14,21H,2,4,10-11H2,(H2,20,24);2-5H,1H3,(H,8,9,10);1H2/t14-;;/m1../s1

SMILES Code: O=C(C1=CC=CC2=CN(C3=CC=C([C@H]4CNCCC4)C=C3)N=C12)N.O=S(C5=CC=C(C)C=C5)(O)=O.[H]O[H]

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:
>3 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: Krens S, van der Meulen E, Jansman FGA, Burger DM, van Erp NP. Quantification of cobimetinib, cabozantinib, dabrafenib, niraparib, olaparib, vemurafenib, regorafenib and its metabolite regorafenib M2 in human plasma by UPLC-MS/MS. Biomed Chromatogr. 2019 Nov 22:e4758. doi: 10.1002/bmc.4758. [Epub ahead of print] PubMed PMID: 31758580.

2: Gallagher JR, Heap KJ, Carroll S, Travers K, Harrow B, Westin SN. Real-world adverse events with niraparib 200 mg/day maintenance therapy in ovarian cancer: a retrospective study. Future Oncol. 2019 Dec;15(36):4197-4206. doi: 10.2217/fon-2019-0471. Epub 2019 Nov 11. PubMed PMID: 31707856.

3: Ji Y, Wang Q, Zhao Q, Zhao S, Li L, Sun G, Ye L. Autophagy suppression enhances DNA damage and cell death upon treatment with PARP inhibitor Niraparib in laryngeal squamous cell carcinoma. Appl Microbiol Biotechnol. 2019 Dec;103(23-24):9557-9568. doi: 10.1007/s00253-019-10148-y. Epub 2019 Nov 4. PubMed PMID: 31686145.

4: LiverTox: Clinical and Research Information on Drug-Induced Liver Injury [Internet]. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases; 2012-. Available from PubMed PMID: 31643655.

5: Gourd E. Niraparib improves progression-free survival in ovarian cancer. Lancet Oncol. 2019 Nov;20(11):e615. doi: 10.1016/S1470-2045(19)30631-X. Epub 2019 Oct 3. PubMed PMID: 31587884.

6: González-Martín A, Pothuri B, Vergote I, DePont Christensen R, Graybill W, Mirza MR, McCormick C, Lorusso D, Hoskins P, Freyer G, Baumann K, Jardon K, Redondo A, Moore RG, Vulsteke C, O'Cearbhaill RE, Lund B, Backes F, Barretina-Ginesta P, Haggerty AF, Rubio-Pérez MJ, Shahin MS, Mangili G, Bradley WH, Bruchim I, Sun K, Malinowska IA, Li Y, Gupta D, Monk BJ; PRIMA/ENGOT-OV26/GOG-3012 Investigators. Niraparib in Patients with Newly Diagnosed Advanced Ovarian Cancer. N Engl J Med. 2019 Sep 28. doi: 10.1056/NEJMoa1910962. [Epub ahead of print] PubMed PMID: 31562799.

7: Matulonis UA, Walder L, Nøttrup TJ, Bessette P, Mahner S, Gil-Martin M, Kalbacher E, Ledermann JA, Wenham RM, Woie K, Lau S, Marmé F, Casado Herraez A, Hardy-Bessard AC, Banerjee S, Lindahl G, Benigno B, Buscema J, Travers K, Guy H, Mirza MR. Niraparib Maintenance Treatment Improves Time Without Symptoms or Toxicity (TWiST) Versus Routine Surveillance in Recurrent Ovarian Cancer: A TWiST Analysis of the ENGOT-OV16/NOVA Trial. J Clin Oncol. 2019 Dec 1;37(34):3183-3191. doi: 10.1200/JCO.19.00917. Epub 2019 Sep 16. PubMed PMID: 31518175; PubMed Central PMCID: PMC6881097.

8: Mirza MR, Åvall Lundqvist E, Birrer MJ, dePont Christensen R, Nyvang GB, Malander S, Anttila M, Werner TL, Lund B, Lindahl G, Hietanen S, Peen U, Dimoula M, Roed H, Ør Knudsen A, Staff S, Krog Vistisen A, Bjørge L, Mäenpää JU; AVANOVA investigators. Niraparib plus bevacizumab versus niraparib alone for platinum-sensitive recurrent ovarian cancer (NSGO-AVANOVA2/ENGOT-ov24): a randomised, phase 2, superiority trial. Lancet Oncol. 2019 Oct;20(10):1409-1419. doi: 10.1016/S1470-2045(19)30515-7. Epub 2019 Aug 29. PubMed PMID: 31474354.

9: Gray S, Khor XY, Yiannakis D. Niraparib as maintenance therapy in a patient with ovarian cancer and brain metastases. BMJ Case Rep. 2019 Aug 28;12(8). pii: e230738. doi: 10.1136/bcr-2019-230738. PubMed PMID: 31466953.

10: Zhang J, Zheng H, Gao Y, Lou G, Yin R, Ji D, Li W, Wang W, Xia B, Wang D, Hou J, Yan J, Hei Y, Zhang ZY, Milton A, Wu X. Phase I Pharmacokinetic Study of Niraparib in Chinese Patients with Epithelial Ovarian Cancer. Oncologist. 2019 Aug 22. pii: theoncologist.2019-0565. doi: 10.1634/theoncologist.2019-0565. [Epub ahead of print] PubMed PMID: 31439812.

11: Mirza MR, Bergmann TK, Mau-Sørensen M, Christensen RD, Åvall-Lundqvist E, Birrer MJ, Jørgensen M, Roed H, Malander S, Nielsen F, Lassen U, Brøsen K, Bjørge L, Mäenpää J. A phase I study of the PARP inhibitor niraparib in combination with bevacizumab in platinum-sensitive epithelial ovarian cancer: NSGO AVANOVA1/ENGOT-OV24. Cancer Chemother Pharmacol. 2019 Oct;84(4):791-798. doi: 10.1007/s00280-019-03917-z. Epub 2019 Aug 2. PubMed PMID: 31375879.

12: Konstantinopoulos PA, Waggoner S, Vidal GA, Mita M, Moroney JW, Holloway R, Van Le L, Sachdev JC, Chapman-Davis E, Colon-Otero G, Penson RT, Matulonis UA, Kim YB, Moore KN, Swisher EM, Färkkilä A, D'Andrea A, Stringer-Reasor E, Wang J, Buerstatte N, Arora S, Graham JR, Bobilev D, Dezube BJ, Munster P. Single-Arm Phases 1 and 2 Trial of Niraparib in Combination With Pembrolizumab in Patients With Recurrent Platinum-Resistant Ovarian Carcinoma. JAMA Oncol. 2019 Jun 13. doi: 10.1001/jamaoncol.2019.1048. [Epub ahead of print] PubMed PMID: 31194228; PubMed Central PMCID: PMC6567832.

13: Vinayak S, Tolaney SM, Schwartzberg L, Mita M, McCann G, Tan AR, Wahner-Hendrickson AE, Forero A, Anders C, Wulf GM, Dillon P, Lynce F, Zarwan C, Erban JK, Zhou Y, Buerstatte N, Graham JR, Arora S, Dezube BJ, Telli ML. Open-Label Clinical Trial of Niraparib Combined With Pembrolizumab for Treatment of Advanced or Metastatic Triple-Negative Breast Cancer. JAMA Oncol. 2019 Jun 13. doi: 10.1001/jamaoncol.2019.1029. [Epub ahead of print] PubMed PMID: 31194225; PubMed Central PMCID: PMC6567845.

14: Del Campo JM, Matulonis UA, Malander S, Provencher D, Mahner S, Follana P, Waters J, Berek JS, Woie K, Oza AM, Canzler U, Gil-Martin M, Lesoin A, Monk BJ, Lund B, Gilbert L, Wenham RM, Benigno B, Arora S, Hazard SJ, Mirza MR. Niraparib Maintenance Therapy in Patients With Recurrent Ovarian Cancer After a Partial Response to the Last Platinum-Based Chemotherapy in the ENGOT-OV16/NOVA Trial. J Clin Oncol. 2019 Nov 10;37(32):2968-2973. doi: 10.1200/JCO.18.02238. Epub 2019 Jun 7. PubMed PMID: 31173551; PubMed Central PMCID: PMC6839909.

15: Wallace K, Goble S, Isaacson J, Maloney L, Cameron T, Bedel J. Comment on: "Cost-Effectiveness of Niraparib Versus Routine Surveillance, Olaparib and Rucaparib for the Maintenance Treatment of Patients with Ovarian Cancer in the United States". Pharmacoeconomics. 2019 Aug;37(8):1065-1067. doi: 10.1007/s40273-019-00815-3. PubMed PMID: 31172449; PubMed Central PMCID: PMC6830408.

16: Guy H, Walder L, Fisher M. Response to 'Comment on "Cost-Effectiveness of Niraparib Versus Routine Surveillance, Olaparib and Rucaparib for the Maintenance Treatment of Patients with Ovarian Cancer in the United States"'. Pharmacoeconomics. 2019 Jul;37(7):965-967. doi: 10.1007/s40273-019-00803-7. PubMed PMID: 31044349.

17: McQueen RB, Whittington MD, Chapman RH, Kumar VM, Campbell JD. Comment on "Cost-Effectiveness of Niraparib Versus Routine Surveillance, Olaparib and Rucaparib for the Maintenance Treatment of Patients with Ovarian Cancer in the United States". Pharmacoeconomics. 2019 Jul;37(7):963-964. doi: 10.1007/s40273-019-00802-8. PubMed PMID: 31044348.

18: Moore KN, Secord AA, Geller MA, Miller DS, Cloven N, Fleming GF, Wahner Hendrickson AE, Azodi M, DiSilvestro P, Oza AM, Cristea M, Berek JS, Chan JK, Rimel BJ, Matei DE, Li Y, Sun K, Luptakova K, Matulonis UA, Monk BJ. Niraparib monotherapy for late-line treatment of ovarian cancer (QUADRA): a multicentre, open-label, single-arm, phase 2 trial. Lancet Oncol. 2019 May;20(5):636-648. doi: 10.1016/S1470-2045(19)30029-4. Epub 2019 Apr 1. Erratum in: Lancet Oncol. 2019 May;20(5):e242. PubMed PMID: 30948273.

19: Neeser K, O'Neil WM, Stern L, Harrow B, Travers K. Budget impact of niraparib as maintenance treatment in recurrent ovarian cancer following platinum-based chemotherapy. J Comp Eff Res. 2019 Jun;8(8):577-587. doi: 10.2217/cer-2018-0069. Epub 2019 Apr 2. PubMed PMID: 30935213.

20: Niraparib Shrinks BRCA-Mutated Prostate Tumors. Cancer Discov. 2019 Apr;9(4):OF7. doi: 10.1158/2159-8290.CD-NB2019-030. Epub 2019 Mar 1. PubMed PMID: 30824427.