While standard "superglue" is 100% ethyl 2-cyanoacrylate, many custom formulations (e.g., 91% ECA, 9% poly(methyl methacrylate), 0.5% hydroquinone, and a small amount of organic sulfonic acid,[24] and variations on the compound n-butyl cyanoacrylate for medical applications[18]) have come to be used for specific applications.
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