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Table 1 Active ingredients of commercial MPS formulations and corresponding minimum time for disinfection based upon manufacturer’s instructions for use. No minimum disinfection time is listed for ASP-57 as this care solution is a research and development product and has not yet been approved for use by the US FDA

From: Comparative in vitro effectiveness of a novel contact lens multipurpose solution on Acanthamoeba castellanii

MPS Active ingredients Conc. (w/w) Min. time for disinfection (h)
ASP-57 Stabilized Cl-O2 (as sodium chlorite) 0.02%
Alkyl(ethylbenzyl)dimethylammonium chloride 0.0001%
Ammonium chloride 0.025%
BioTrue Polyaminopropyl biguanide 0.00013% 4
Polyquaternium 0.0001%
Opti Free Myristamidopropyl dimethylamine 0.0005% 6
Polyquaternium-1 0.001%