Vector Labs is closed to observe Independence Day (US Holiday) on Thursday, July 4th.
We will be back in the office on Friday. We will respond to emails upon our return. Have a wonderful day.

AZDye 350 Acid (FP-1003)


VectorlabsAZDye™ 350 Acid is an amine reactive, non-activated, water-soluble, blue-emitting dye used for derivatizing amine-containing molecules in the presence of activators (e.g. EDC or HATU) through a stable, covalent amide bond. The NHS ester (or succinimidyl ester) of this dye is also available for conjugating AZDye™ 350 to the primary amines of proteins or antibodies (Lys), amine-modified oligonucleotides, and other amine-containing molecules.

AZDye™ 350 is a moderately photostable, blue-fluorescent probe optimally excited by the 350 nm laser line routinely used for producing bright, blue fluorescent conjugates for imaging and flow cytometry. The emission of AZDye™ 350 conjugates is slightly shorter than that of AMCA or AMCA conjugates, reducing AZDye™ 350’s spectral overlap with the emission of fluorescein or Alexa Fluor® 488 dye.

AZDye™ 350 dye structurally is identical to Alexa Fluor® Dye 350.


Unit Size1 mg, 5 mg, 25 mg, 100 mg
ReactivityPrimary amines (needs activation)
Abs/Em Maxima346/445 nm
Extinction coefficient19,000 cm-1M-1
SolubilityWater, DMSO, DMF
Spectrally similar dyesAlexa Fluor® 350, AMCA, DyLight® 350
Molecular weight313.27
Storage Conditions-20°C
Shipping ConditionsAmbient temperature

Abs/Em Spectra

Af Af Vectorlabs

Applicable patents and legal notices are available at legal notices.

How do I Request a Quote?

To request a quote for products:

  1.  Sign in to
  2.  Add the items you wish to quote to the cart;
  3.  View your cart;
  4.  Click on the “Request a Quote” button found below the items in your cart;
  5.  Download your quote