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PurePurge™ Inc. is a manufacturer and global distributor of cutting-edge photo-dynamic, disinfection products.

From it’s Southern California laboratories, PurePurge™ has developed a patent-pending method of taking one of the most photo-sensitizing substances available and rendering it transiently water soluble, resulting in an organic, photo-sensitive dye that can be deposited into or onto the surface of a vast range of substrates, fabrics and materials.

In the presence of LIGHT, this proprietary organic dye – PurePurge™ – acts as catalyst to generate highly reactive singlet oxygen molecules, which attack and destroy any microbes present on the material or substrate.

PurePurge™ has perfected the technique of producing large quantities of singlet oxygen in an commercially viable manner, by creating a self renewing, non-depleting source of singlet oxygen.

“…The photosensitizer (the dye), in a singlet ground state (S0), is photo-excited to the first excited singlet state, electron spins paired (* S1) by visible light incident on the photosensitizer. This excited state can either relax to the ground state via fluorescence (F), or it may undergo an intersystem crossing (ISC) to a triplet excited state with the electron spins unpaired (* T1). It is this triplet state which leads to the antimicrobial action, as there are two available pathways of reactions.

The Type I reactions involve electron transfer and result in the production of radicals such as superoxide and the hydroxyl radical. The Type II reactions involve energy transfer from the triplet excited state, as it relaxes back to the ground state. Energy is typically transferred to ground state triplet oxygen, which is excited to a singlet state. Principally, it is the production of singlet oxygen by the Type II process which is thought to act upon the bacterial cells, but the reactive oxygen species (ROS) produced by the Type I process are similarly destructive to cells…”

*R. Bonnett, Photosensitizers of the Porphyrin and Phthalocyanine Series for Photodynamic Therapy- 1995