SAT NANO is an excellent manufacturer of Nano gold dispersion in China. Colloidal gold solution is a liquid product formed by dispersing nano gold particle in a solution. Nano gold dispersion is most extensively nanomaterials for biomedical application due to their unique properties, such as rapid and simple synthesis, large surface area, strong adsorption ability and facile conjugation to various biomolecules. We can supply 20nm, 100-10000ppm content.