Azide free anti-horse primary antibodies are immunoreagents formulated without sodium azide as a preservative, designed for applications where this bacteriostatic agent interferes with biological activity or downstream processing. Produced by immunizing hosts such as goat, rabbit, or mouse with purified horse immunoglobulins, these antibodies are affinity-purified and supplied in phosphate-buffered saline (PBS) without azide, bovine serum albumin (BSA), or glycerol carriers.

Advantages of Azide-Free Formulations

Sodium azide is commonly included in antibody storage buffers but inhibits horseradish peroxidase (HRP) activity, interferes with conjugation reactions, and is cytotoxic to living cells. The azide-free format preserves compatibility with cell culture, antibody labeling workflows, and enzyme-linked detection systems while also reducing endotoxin content for sensitive biological applications. Available specificities include anti-IgG (H+L) and isotype-specific reagents, with liquid formulations typically provided at concentrations ranging from 0.5 to 2 mg/mL.

Applications

Azide free anti-horse antibodies are employed across a wide range of immunoassays requiring preservative-free conditions. In live-cell flow cytometry and fluorescence-activated cell sorting (FACS), the absence of azide prevents cytotoxic effects and enables functional analysis of equine cells. These antibodies are conjugation-ready for custom labeling with fluorophores, enzymes, or nanoparticles without requiring buffer exchange to remove interfering preservatives. They are widely used in immunofluorescence microscopy, immunohistochemistry, ELISA, Western blotting, immunoprecipitation, and functional neutralization or blocking assays. Optimal antibody dilutions are application-dependent and should be determined empirically. These reagents are intended for research use only and are not designed for diagnostic procedures.