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

MedKoo CAT#: 406519

CAS#: 321674-73-1

Description: BIBR1532 is a selective telomerase inhibitor. BIBR1132 is highly selective for inhibition of telomerase, resulting in delayed growth arrest of tumor cells. Treatment of cancer cells with BIBR1532 leads to progressive telomere shortening, consecutive telomere dysfunction, and finally growth arrest after a lag period that is largely dependent on initial telomere length.

Chemical Structure

CAS# 321674-73-1

Theoretical Analysis

MedKoo Cat#: 406519
Name: BIBR1532
CAS#: 321674-73-1
Chemical Formula: C21H17NO3
Exact Mass: 331.12084
Molecular Weight: 331.36
Elemental Analysis: C, 76.12; H, 5.17; N, 4.23; O, 14.49

Size Price Shipping out time Quantity
25mg USD 150 Same day
50mg USD 250 Same day
100mg USD 450 Same day
200mg USD 850 Same day
500mg USD 1750 Same day
1g USD 2650 Same day
2g USD 4850 2 weeks
5g USD 6950 2 weeks
Inquire bulk and customized quantity

Pricing updated 2021-03-01. Prices are subject to change without notice.

BIBR1532, purity > 98%, is in stock. The same day shipping after order received.

Synonym: BIBR1532; BIBR-1532; BIBR 1532.

IUPAC/Chemical Name: (E)-2-(3-(naphthalen-2-yl)but-2-enamido)benzoic acid


InChi Code: InChI=1S/C21H17NO3/c1-14(16-11-10-15-6-2-3-7-17(15)13-16)12-20(23)22-19-9-5-4-8-18(19)21(24)25/h2-13H,1H3,(H,22,23)(H,24,25)/b14-12+


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).

HS Tariff Code:

Preparing Stock Solutions

The following data is based on the product molecular weight 331.36 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Select a batch to recalculate based on the batch molecular weight:
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Bashash D, Ghaffari SH, Mirzaee R, Alimoghaddam K, Ghavamzadeh A. Telomerase inhibition by non-nucleosidic compound BIBR1532 causes rapid cell death in pre-B acute lymphoblastic leukemia cells. Leuk Lymphoma. 2013 Mar;54(3):561-8. doi: 10.3109/10428194.2012.704034. Epub 2012 Sep 28. PubMed PMID: 22957790.

2: Parsch D, Brassat U, Brümmendorf TH, Fellenberg J. Consequences of telomerase inhibition by BIBR1532 on proliferation and chemosensitivity of chondrosarcoma cell lines. Cancer Invest. 2008 Jul;26(6):590-6. doi: 10.1080/07357900802072905. PubMed PMID: 18584350.

3: El Daly H, Martens UM. Telomerase inhibition and telomere targeting in hematopoietic cancer cell lines with small non-nucleosidic synthetic compounds (BIBR1532). Methods Mol Biol. 2007;405:47-60. doi: 10.1007/978-1-60327-070-0_6. PubMed PMID: 18369817.

4: Mueller S, Hartmann U, Mayer F, Balabanov S, Hartmann JT, Brummendorf TH, Bokemeyer C. Targeting telomerase activity by BIBR1532 as a therapeutic approach in germ cell tumors. Invest New Drugs. 2007 Dec;25(6):519-24. Epub 2007 May 30. PubMed PMID: 17534576.

5: El-Daly H, Kull M, Zimmermann S, Pantic M, Waller CF, Martens UM. Selective cytotoxicity and telomere damage in leukemia cells using the telomerase inhibitor BIBR1532. Blood. 2005 Feb 15;105(4):1742-9. Epub 2004 Oct 26. PubMed PMID: 15507522.

6: Pascolo E, Wenz C, Lingner J, Hauel N, Priepke H, Kauffmann I, Garin-Chesa P, Rettig WJ, Damm K, Schnapp A. Mechanism of human telomerase inhibition by BIBR1532, a synthetic, non-nucleosidic drug candidate. J Biol Chem. 2002 May 3;277(18):15566-72. Epub 2002 Feb 19. PubMed PMID: 11854300.

Additional Information