ʻO ka pūhui waiʻona he ʻano mea hoʻohui kemika i loaʻa kahi pūʻulu hana hydroxyl (-OH) i hoʻopili ʻia i kahi ʻātoma kalapona.Hoʻohana maʻamau ia i ka hana ʻana i nā solvents, nā wahie, a me nā lāʻau lapaʻau.Hiki ke hoʻokaʻawale ʻia ka waiʻona i ke kumu mua, ke kula kiʻekiʻe, a me ke kula kiʻekiʻe ma muli o ka helu o nā ʻātoma kalapona i hoʻopili ʻia i ka atom kalapona me ka hui hydroxyl.Loaʻa i kēia mau pūhui ka nui o ka hoʻohana ʻana ma ka ʻoihana a i ke ola o kēlā me kēia lā, e like me nā antiseptics, disinfectants, a me nā preservatives.Hiki ke loaʻa iā lākou i loko o nā mea inu ʻona, e like me ka pia, ka waina, a me nā ʻuhane.