Cov khoom ntawm cov roj thiab nws cov khoom yog cov cim tseem ceeb rau kev ntsuas cov roj zoo thiab tswj kev ua haujlwm hauv kev tsim khoom thiab kev tshawb fawb. Ua ntej ua cov khoom siv roj, ntau yam khoom siv lub cev thiab tshuaj lom neeg ntawm nws yuav tsum tau ntsuas thiab tom qab ntawd ntsuas, thiab tom qab ntawd cov txheej txheem tsim nyog ntawm cov khoom siv roj yuav tsum tau txiav txim siab raws li qhov ntsuas tau.
Cov ntsuas kev ua tau zoo ntawm cov khoom roj suav nrog cov khoom siv distillation, ceev, flatiing point, cov hmoov av, pens, tus nqi tsawg, tus nqi nruab nrab, tus nqi nruab nrab, aniline Point, Sulfur ntsiab lus, Tiv thaiv xeb, Nitration Degree, Sulfurization Degree, Foaming, Carbon ntsiab lus, Hydrogen ntsiab lus, Sulfur ntsiab lus, Nitrogen ntsiab lus, chlorine ntsiab lus, huv si, Oxidation Degree, Refractive Index, Dej sib cais, Foaming Properties, Rotary Bombibility, , Liquid Phase Corrosion, Copper Sheet Corrosion, thiab lwm yam.