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In page Cyanoacrylate:

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Acetone, commonly found as a fraction of nail polish remover (or at hardware stores in pure form), is a widely available solvent capable of softening cured cyanoacrylate.[1] Other solvents include nitromethane, dimethylformamide,[2] dimethyl sulfoxide, and methylene chloride.[3] Another viable solvent for removing cured cyanoacrylate is gamma-butyrolactone.[4] Commercial debonders are also available, many based on propylene carbonate.[citation needed]