Qhov sib txawv ntawm cov khoom siv tshuaj lom neeg thiab kev ua haujlwm ib puag ncig
- Kev sib piv toxicity:Ethylene glycol (C₂H₆O₂)nthuav tawm cov tshuaj toxicity tseem ceeb, nrog rau kev noj 5mL / kg txaus los ua rau muaj tshuaj lom rau cov neeg laus (xws li WHO cov ntaub ntawv), yuav tsum muaj kev tiv thaiv nruj. Propylene glycol (C₃H₈O₂) yog ib yam tshuaj lom neeg tsawg - tshuaj lom neeg raug cais los ntawm FDA raws li Kev Pom Zoo Raws Li Kev Nyab Xeeb (GRAS), haum rau siv hauv cov khoom noj thiab tshuaj lag luam.
- Biodegradability:Propylene glycolnthuav tawm tshaj 80% degradation tus nqi nyob rau hauv tej yam ntuj tso ib puag ncig (EPA tshawb fawb), whereas ethylene glycol degrades maj mam thiab tej zaum yuav ua rau muaj kuab paug nyob rau hauv dej.
Lub cev muaj zog thiab kev ua tau zoo
- Thermal Conductivity: Ethylene glycol nthuav tawm cov thermal conductivity ntawm 0.25 W / (m·K), outperforming propylene glycol's 0.20 W / (m·K), ua kom nws haum rau siab - lub zog cav txias.
- Freezing Point thiab Boiling Point:
50% ethylene glycol aqueous tov: khov point -37 degree, boiling point 107 degree;
Ib qho 50% propylene glycol aqueous tov muaj qhov khov ntawm -34℃thiab qhov kub ntawm 106℃(Source: SAE Standard J814). Propylene glycol nyiam ua kom tuab thiab nthuav tawm txo qis hauv qhov chaw txias heev (piv txwv li, qis dua -40℃).
Daim ntawv thov
- Ethylene glycol: Tus nqi- cov ntawv siv tau zoo nrog cov kev xav tau txias txias, xws li cov pa roj tsheb thiab cov tshuab hnyav- lub luag haujlwm;
- Propylene glycol: Teb nrog cov kev cai ib puag ncig nruj, xws li lub zog tshiab thiab cov khoom siv ua zaub mov.