Luminol sodium salt | CAS 20666-12-0

Luminol sodium salt is a chemiluminescent reagent widely used to generate light in the presence of suitable oxidants and peroxidase activity. As an anionic, water-compatible luminol formulation, it is commonly deployed in enzyme-linked and oxidative signal readouts where luminescence intensity reports on reactive species or catalytic activity. In fluorescence-adjacent workflows, luminol-based chemiluminescence is often selected to avoid excitation light and reduce background associated with optical fluorescence measurements.

1. Peroxidase Activity Assays

Luminol sodium salt is frequently used in peroxidase-catalyzed luminescence assays, where enzyme activity drives oxidation of luminol to produce measurable light. Researchers in biochemical assay development and chemical biology use it to monitor horseradish peroxidase (HRP) conjugates in plate-based formats, including immunoassay-style workflows and enzyme reporter systems. The reagent's compatibility with aqueous assay buffers makes it practical for routine luminometry instrumentation used in screening and analytical development.

2. Oxidative Reactive Species Detection

Luminol sodium salt is also used as a chemiluminescent reporter for oxidative species generated in vitro, enabling luminescence readouts that correlate with the presence of oxidants. In materials science and industrial research settings, it is commonly applied to evaluate oxidative stress in chemical reaction monitoring, antioxidant screening, and redox-active additive characterization. Because the readout is light emission rather than fluorescence excitation, luminol chemiluminescence is often used when minimizing optical interference from colored samples is advantageous.

3. Chemiluminescent Immunoassay Reporters

Luminol sodium salt supports chemiluminescent detection strategies in which luminol is paired with enzyme-labeled antibodies or affinity reagents to convert binding events into light. Molecular biology and diagnostic-reagent development teams use this approach to generate robust luminescent signals in microplate luminometers and related imaging luminometers for endpoint assays. The reagent's aqueous sodium salt form helps streamline reagent preparation for routine assay workflows that rely on HRP-type signal amplification.

4. Flow Cytometry Signal Readouts

Luminol sodium salt can be incorporated into specialized flow cytometry workflows that rely on chemiluminescent detection rather than fluorescence, particularly when optical spectral overlap complicates multicolor fluorescence panels. In cell biology research, chemiluminescent reporters are used to monitor oxidative bursts or enzyme-associated reactions on or near cell surfaces, with light emission serving as the readout. This application is most common in labs that already operate chemiluminescence-capable cytometry setups and prefer emission-based detection to reduce excitation-related artifacts.