Aldehyde, Ketone, Carboxylic Acid Aldehyde: Aldehyde is an organic compound which contain formyl group. This functional group, in its structure R-CHO, consist of carboxyl centre bonded to R group and hydrogen.
1 Infections, bites and stings, infestations, chronic diseases, allergic reactions, sun exposure, and dry skin are among the numerous causes of itching.  Anti-itch creams and lotions containing camphor, menthol, phenol, pramoxine (Caladryl, Tronolane), diphenhydramine (Benadryl), or benzocaine can bring relief.
Alaway (ketotifen fumarate ophthalmic solution) Antihistamine Eye Drops provide temporary relief for itchy eyes due to ragweed, pollen, grass, animal hair and dander. Original Rx strength Alaway, now available over-the-counter, quickly stops the itch within minutes and provides up to 12 hours of symptom relief.