Tooj liab yog ib qho ntawm cov hlau uas muaj zog tshaj plaws, tsis tshwj xeeb tshaj yog muaj zog lossis tawv. Lub zog thiab hardness yog appreciably nce los ntawm txias-ua hauj lwm vim yog tsim ntawm elongated crystals ntawm tib lub ntsej muag-centred cubic qauv uas yog tam sim no nyob rau hauv lub softer annealed tooj liab. Cov pa roj carbon ntau, xws li oxygen, nitrogen, carbon dioxide, thiab sulfur dioxide yog soluble hauv molten tooj liab thiab cuam tshuam rau cov khoom siv hluav taws xob thiab hluav taws xob ntawm cov hlau solidified. Cov hlau ntshiab yog thib ob tsuas yog nyiaj hauv thermal thiab hluav taws xob conductivity. Ntuj tooj liab yog sib xyaw ntawm ob lub isotopes ruaj khov: tooj liab -63 (69.15 feem pua) thiab tooj liab -65 (30.85 feem pua).
