I’m in the process of packaging an amino acid that contains HCl in salt form. The mixture is 60% base and 40% HCl salt.
Will this react to metallized aluminium plastic?
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$\begingroup$ The carboxyl group is more acidic than the ammonium one. $\endgroup$– PoutnikCommented Mar 13 at 15:39
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There likely is a plastic (e.g., polyethylene) layer underneath the aluminum, to seal to the plastic bottle.
Polythene is resistant to $\ce{HCl}$, though somewhat porous. You can specify a thicker layer, as from this supplier: "20 mic./ 25mic. / 30 mic. / 40 mic.,20 mic./ 25mic. / 30 mic. / 40 mic.". N.B. Check with supplier whether thickness applies to aluminum, to polythene, or both.
answered Mar 13 at 16:04