2- Hydrazinopyridine dihydrochloride


This product has been discontinued.

Please contact Technical Support @ technical@vectorlabs.com for assistance in finding an alternative.
SKU Unit Size Price
S-2002-100 100 mg

To request a quote for products:

  1. Click “Contact Us” in the header bar above;
  2. Click “Customer Service”;
  3. Complete the form and provide the following information in the “Comments” section: note you would like a quote, item number (SKU) and quantity;
  4. Click “Submit”.


2-Hydrazinopyridine is an aromatic hydrazine reagent used to quantify the number of 4FB groups on proteins, oligos and other biomolecules prior to conjugation. The number of functional groups per biomolecule is known as the molar substitution ratio, or MSR. This is an important step in the conjugation process, as it allows for precise quantification of the number of linkers attached to a biomolecule, which in turn ensures reproducibility of conjugation from batch-to-batch. This aromatic hydrazine reacts with 4FB-modified biomolecules to form a quantifiable hydrazone which absorbs maximally at 345 nm with a molar extinction coefficient of 24,500 L/(mol*cm).


More Information
Reactivity 4FB
Recommended Storage Desiccated: 2° - 8°C
Applications In Situ Proximity Ligation
Other Name(s) 2- Hydrazinopyridine 2HCl, SoluLINK Bioconjugation



Home Bioconjugation Reagents Bioconjugation Ancillary Products 2- Hydrazinopyridine dihydrochloride