Freon 12 (CF₂Cl₂), codenamed R12, yog xim tsis muaj xim, tsis muaj ntxhiab, pob tshab, thiab zoo li tsis yog{2}} cov tub yees muaj kuab lom. Txawm li cas los xij, thaum nws cov concentration hauv huab cua ntau dua 80%, nws tuaj yeem ua rau asphyxiation. Freon 12 tsis yog flammable los yog tawg. Thaum raug hluav taws kub los yog kub tshaj 400 degree, nws decomposes rau hydrogen fluoride, hydrogen chloride, thiab phosgene (COCl₂). R12 yog siv dav hauv nruab nrab-kub tub yees haum rau me me mus rau nruab nrab- cov tub yees loj, xws li tub yees thiab lub tub yees. Vim tias R12 tuaj yeem yaj ntau cov organic sib txuas, cov roj hmab zoo tib yam (ntiv nplhaib) siv tsis tau; chloroprene roj hmab los yog nitrile roj hmab los yog sealing rings feem ntau yog siv.
Freon 22 (CHF₂Cl), codenamed R22, kuj tsis yog flammable los yog tawg. Thaum me ntsis tshuaj lom tshaj li R12, nws solubility hauv dej yog siab dua, tab sis nws tseem tuaj yeem ua rau "cov dej khov" hauv lub tub yees. R22 yog ib feem miscible nrog lubricating roj, tab sis nws solubility txawv nrog rau hom lubricating roj thiab kub. Yog li ntawd, lub tshuab tub yees siv R22 yuav tsum muaj roj rov qab mechanisms.
Qhov sib thooj evaporation kub ntawm R22 ntawm tus qauv atmospheric siab yog -40.8 degree, thiab nws condensing siab ntawm chav tsev kub tsis tshaj 15.68 × 10⁵ Pa. R22 tub yees yog siv dav hauv cov khoom siv cua txias.
Tetrafluoroethane (R134a, CH2FCF3), raug xaiv R13, yog tsis muaj - lom, muaj kuab paug- cov tub yees dawb nrog cov ntaub ntawv muaj kev nyab xeeb tshaj plaws. Nws muaj TLV ntawm 1000 teev tsaus ntuj thiab GWP ntawm 1300. Nws yog dav siv hauv cov khoom siv tub yees, tshwj xeeb tshaj yog nyob rau hauv cov cuab yeej uas muaj cov tub yees siab.
