What are the ingredients of teeth whitening agents
2025-08-18
The main components of teeth whitening agents can be divided into chemical bleaching and physical friction based on their principle of action. Common effective ingredients include peroxides, physical abrasives, etc. They improve tooth color through different mechanisms, but attention should be paid to their proper use to avoid damaging enamel or causing sensitivity.
Main component analysis
Peroxides (such as hydrogen peroxide, urea peroxide) 1
This is the most common chemical bleaching component, which decomposes pigment molecules on the surface of teeth through redox reactions. The concentration of hydrogen peroxide is usually between 3% -10% (for household products) or 15% -40% (for professional clinics), and the higher the concentration, the more significant the bleaching effect, but it may increase the risk of dentin sensitivity. After the decomposition of urea peroxide, hydrogen peroxide is released, which has a milder effect and is suitable for sensitive populations.
Physical abrasives (such as silica, calcium carbonate) 2
Remove external pigments (such as tea stains and coffee stains) from the surface of teeth through slight friction. Attention should be paid to the fineness of grinding particles, as rough particles may wear down enamel and lead to rough tooth surfaces after long-term use.
Auxiliary component 3
PH regulators (such as glycerol, phosphoric acid): maintain product stability and reduce the erosion of enamel by acidic environments.
Thickener (such as Carbopol): prolongs the contact time between whitening agents and teeth, enhancing their effectiveness.
Soothing agents (such as potassium nitrate, fluoride): Relieve tooth sensitivity and enhance enamel's resistance to acidity.
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