Cov kuab tshuaj cawv yog ib chav kawm ntawm cov organic tebchaw uas muaj ib lossis ntau pawg hydroxyl (-OH) thiab muaj feem ntau ntawm carbon, hydrogen, thiab oxygen. Raws li lawv cov qauv molecular, lawv tau muab faib ua hom xws li monohydric alcohols (muaj ib pawg hydroxyl) thiab polyhydric alcohols (muaj ob lossis ntau pawg hydroxyl). Cov piv txwv ntawm monohydric cawv muaj xws li methanol, ethanol, n-propanol, isopropanol, thiab butanol, thaum piv txwv ntawm polyhydric cawv muaj xws li ethylene glycol thiab propylene glycol. Qhov sib txawv ntawm cov saw hlau ntev, tus naj npawb ntawm pawg hydroxyl, thiab cov txheej txheem kev teeb tsa ua rau muaj kev hloov pauv hauv cov khoom xws li polarity, solvency, thiab volatility.
Cov pab pawg hydroxyl hauv cov kuab tshuaj cawv muaj qhov sib txawv ntawm cov polarity, ua rau lawv tsim hydrogen bonds nrog dej thiab lwm yam khoom uas muaj pawg polar, uas nyob rau hauv lem cuam tshuam lawv cov yam ntxwv solubility. Raws li cov pa roj carbon saw ntev nce, qhov tsis yog-polar ntawm cov molecule feem ntau loj hlob, feem ntau ua rau txo qis hauv dej solubility. Piv txwv li, methanol thiab ethanol yog miscible nrog dej nyob rau hauv tag nrho cov proportions, thiab isopropanol kuj qhia tau zoo dej miscibility, whereas ib co cawv nrog ntev carbon chains qhia kuj qis solubility nyob rau hauv dej. Polyhydric alcohols, vim muaj ntau pawg hydroxyl, feem ntau pom muaj zog hydrophilicity thiab tsis tshua muaj volatility, txawm tias lawv cov khoom tshwj xeeb tseem nyob ntawm lawv cov qauv molecular.
Cov tshuaj muaj pes tsawg leeg ntawm cawv kuab tshuaj dictates lawv ntau yam kev siv. Methanol, ethanol, thiab isopropanol nquag siv hauv kev ntxuav, tshem tawm, txheej, thiab tshuaj lom neeg tsim khoom; butanol yog siv nyob rau hauv tej formulations rau coatings, inks, thiab resins; thiab ethylene glycol thiab propylene glycol feem ntau yog ua haujlwm hauv cov khoom siv tshuaj tua kab mob, cov khoom siv hluav taws xob hloov hluav taws xob, thiab ntau yam kev lag luam formulations. Thaum xaiv cov kuab tshuaj, yam xws li purity, dej cov ntsiab lus, evaporation tus nqi, solvency, thiab compatibility nrog rau lwm yam ntaub ntawv yuav tsum tau txiav txim siab. Tsis tas li ntawd, kev pheej hmoo kev nyab xeeb sib txawv ntawm cov cawv sib txawv - piv txwv li, methanol yog cov tshuaj lom heev, thaum ethanol thiab isopropanol yog cov nplaim taws heev. Yog li ntawd, kev cia khoom thiab kev siv yuav tsum tau tswj hwm raws li Daim Ntawv Qhia Kev Nyab Xeeb tshwj xeeb (SDS) rau cov khoom hauv nqe lus nug.