Coloured silica particles (-red, -blue and -black)
are avaiable in the size range of 100 nm to 1,5 µm as monodisperse and nonporous particles with a density of 2.0 g/cm³,
have broader size distributions in the area of the porous silica particles with adjusted diameters between 3 and 20 microns and a density of 1.8 g/cm³,
contain a high amount of covalently bound red dye in the silica matrix (-red),
are available with covalently bound blue dye in the silica matrix (-blue),
are available with a coating of black ink, that is stable in aqueous media, but not in organic solvents (-black),
are produced by hydrolysis of orthosilicates and related compounds,
are extremely stable in organic solvents and buffers (No toxic effects come from the covalently bound dyes.),
have a hydrophilic surface with terminal Si-OH-bonds,
are applied for membrane checks, flow investigations or the quality of antibody coupling procedures on surfaces,
are available with a plain surface (Si-OH) or with NH2 groups on the particle surface for the covalent binding of proteins, antibodies, oligonucleotides, enzymes or other molecules.