Denture cleaning tablet containing a bleach activator and an organic phosphonic acid stabilizer

A cleaning tablet for the automatic cleaning of dentures in an aqueous solution, including at least one compound chosen from the group consisting of:

• sodium carbonate and carbonates in an amount of approximately 10 to about 40 percent by weight, at least one compound chosen from the group consisting of:
• citric acid, citrate, and citrates in an amount of approximately 5 to about 20 percent by weight, sodium perborate in an amount of approximately 15 to about 30 percent by weight, potassium monopersulphate in an amount of approximately 10 to about 40 percent by weight, and including a content of surfactants and foam forming agents, binders, lubricants and disintegrants, antimicrobial agents, carriers, flavouring/aromatizing substances, and at least one perborate/peroxide activator and at least one phosphorus compound;
• the activator content being between approximately 0.5 to about 3.0% by weight of the total composition of the cleaning tablet, the phosphorus compound being exclusively at least one compound chosen from the group consisting of hydrolysis-stable organic phosphonic acid and salts thereof functioning as a stabilizing agent and being present in a content of between approximately 0.5 to about 3.0% by weight of the total composition of the cleaning tablet and the total composition of the cleaning tablet being free of any hydrophobic binder and being free from inorganic phosphates/polyphosphates and organic sequestrants based on aminocarboxylic acids.