Folin’s reagent is supplied by HiMedia.

• Molecular formula: C10H5NaO5S

• Molecular weight: 260.20

• CAS Number: 521-24-4

Folin’s reagent or sodium 1,2-naphthoquinone-4-sulfonate is a chemical reagent used as a derivatizing agent to measure levels of amines and amino acids. The reagent reacts with them in alkaline solution to produce a fluorescent material that can be easily detected.