LABELING FLUORESCENT COMPOUND

摘要

A labeling fluorescent compound which enables highly stable detection in vital labeling and has high sensitivity. The labeling fluorescent compound is characterized by being composed of inorganic fluorescent nanoparticles which have a surface modification compound disposed on the surface thereof and have an average particle diameter of 1.0-20 nm. It is further characterized in that the proportion of the length of the surface modification compound as measured from the surface of the inorganic fluorescent nanoparticles to the particle diameter of the inorganic fluorescent nanoparticles is from 0.10 to 0.50, and that the proportion of the specific gravity of the inorganic fluorescent nanoparticles having the surface modification compound fixed thereto to the specific gravity of the inorganic fluorescent nanoparticles not having the surface modification compound is from 0.80 to 0.40.