Benzil Alkohol Allergia. Patch testing yielded positive reactions to benzyl alcohol 1% in petrolatum and to vanillal s 10026. Patch test indicated allergic to benzyl alcohol,take opthalmic solution (eye drops) which contain benzalkonium chloride 0.005% and another with 0,02%. Is it possible to be allergic to a smell? Quora from www.quora.com With that said, you…