Applications
4-Nitrobenzenediazonium tetrafluoroborate is widely used as a standard reagent in organic synthesis. It is used as a dye for enterochromaffin cells. It is used for the spectrophotometric determination of common aromatic diisocyanates [toluene-2,4-diyl diisocyanate and 4,4′-methylenebis(phenyl isocyanate)] and gallic acid. It is also used for tissue staining and determination of trace phenols.

Solubility
Soluble in acetonitrile and dimethyl sulfoxide.

Notes
Moisture sensitive. Store in a cool place. Keep the container tightly closed. Incompatible with strong bases, strong oxidizing agents and moisture.