What Is Phthalimidoperoxycaproic Toothpaste (PAP)?

What is PAP?

Phthalimidoperoxycaproic acid (PAP) is a non‑peroxide bleaching agent gaining traction in whitening formulations. It oxidises pigment without generating radical species, making it gentler on teeth and gums. (Reference: PMC8700120) It’s increasingly used in over-the-counter whitening products. 

How does it differ from peroxide whitening?

Unlike hydrogen peroxide, PAP acts more gently, with less risk of sensitivity or enamel damage. A clinical retrospective and preclinical study found that PAP produced whitening with minimal impact on enamel hardness or morphology. 

How effective is PAP?

Compared to peroxide, PAP is usually less potent in extreme whitening, but it offers a safer balance. In comparative trials, H₂O₂ still achieved greater whitening, but PAP reduced artificial stains effectively and caused less surface change. 

Who might benefit from PAP?

People with sensitivity, thinner enamel, or who prefer gentler bleaching may prefer PAP-based options. Because it’s less aggressive, it may be better suited for ongoing maintenance rather than dramatic whitening.

Whitening Without the Worry - Thanks to PAP

NUEOS is committed to clean, safe innovation. That’s why we’ve embraced PAP technology in our gentle whitening approach. Unlike peroxide, PAP works without damaging enamel or increasing sensitivity making it a gentler yet effective option for keeping your smile bright. Combined with our LED-powered Light Bath, the result is a forward-thinking system for everyday radiance.

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