Whitening agents can be made of hydrogen peroxide H2O2 common peroxide, carbamide peroxide CH4N2OH2O2 or they can equally be made of sodium perborate NaBO3; in this last instance, sodium perborate can be associated to distilled water, physiological saline or hydrogen peroxide.
H2O2 o a base de perborato de sodio NaBO3, siendo éste asociado con agua destilada, suero fisiológico o con peróxido de hidrogeno.