Illuminating research for decades

Alexa Fluor® dyes—the leading and most trusted fluorescent dyes available today.  In addition to superior performance you’ll get an experienced, problem-solving technical support team, >50,000 published references, application and experimental tips, as well as protocols to help with experimental planning. For the best research experience, you’ll want to use Alexa Fluor® dyes.

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Highest-performing dyes available

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Alexa Fluor®  conjugates exhibit more intense fluorescence than other spectrally similar conjugates. Learn more about:

Alexa Fluor® dyes brightness
Alexa Fluor® dyes photostability

Using too much secondary antibody?

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Alexa Fluor® dyes superior performance means you need less conjugate for optimal results.

See a comparison of working concentration of selected secondary conjugates

Alexa Fluor® dyes across the spectrum

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Alexa Fluor® dyes and conjugates are available across the visible spectrum and beyond.

Learn more about our wide range of Alexa Fluor® dyes