Catalog No. Size PriceQuantity
M11643-2 2mg solid $100
M11643-10 10mg solid $300


Biotin-PEG4-alkyne is a biotin-labeled, PEG-based PROTAC linker that can be used in the synthesis of PROTACs.

Product information

CAS Number: 1458576-00-5

Molecular Weight: 457.58

Formula: C21H35N3O6S

Chemical Name: 5-[(3aR, 4R, 6aS)-2-oxo-hexahydro-1H-thieno[3, 4-d]imidazol-4-yl]-N-(3, 6, 9, 12-tetraoxapentadec-14-yn-1-yl)pentanamide



InChi: InChI=1S/C21H35N3O6S/c1-2-8-27-10-12-29-14-15-30-13-11-28-9-7-22-19(25)6-4-3-5-18-20-17(16-31-18)23-21(26)24-20/h1,17-18,20H,3-16H2,(H,22,25)(H2,23,24,26)/t17-,18-,20-/m1/s1

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO : 100 mg/mL (218.54 mM; Need ultrasonic)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥360 days if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200


  1. Gadd MS, et al. Structural basis of PROTAC cooperative recognition for selective protein degradation. Nat Chem Biol. 2017 May;13(5):514-521.

Products are for research use only. Not for human use.

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