Cov dej cawv yog ib hom tshuaj sib xyaw uas muaj cov pab pawg hydroxyl functional (-OH) txuas rau cov pa roj carbon atom.Nws yog feem ntau siv rau hauv kev tsim cov kuab tshuaj, roj, thiab tshuaj.Cawv tuaj yeem muab faib ua thawj, theem nrab, thiab theem nrab raws li cov pa roj carbon atoms txuas nrog cov pa roj carbon atom nrog pawg hydroxyl.Cov tebchaw no muaj ntau yam kev siv hauv kev lag luam thiab hauv lub neej txhua hnub, suav nrog tshuaj tua kab mob, tshuaj tua kab mob, thiab tshuaj tua kab mob.Lawv kuj tuaj yeem pom hauv cov dej cawv, xws li npias, cawv, thiab dab.