Qhov sib txawv tseem ceeb ntawm benzophenone-3 thiab benzophenone-4 yog nyob rau hauv cov khoom siv tshuaj pleev thaiv hnub, benzophenone-3 tuaj yeem siv ntawm 6% concentration lossis qis dua, whereas benzophenone-4 yog siv ntawm 10% concentration lossis qis dua.
tshuaj pleev thaiv hnub lossis tshuaj pleev thaiv hnub (qee lub npe hu ua hnub ci thiab) yog cov khoom siv tiv thaiv peb siv ntawm daim tawv nqaij. Lawv tau nqus los ntawm daim tawv nqaij thiab muaj kev cuam tshuam qee lub hnub ci UV hluav taws xob los tiv thaiv daim tawv nqaij los ntawm tshav kub thiab tiv thaiv kab mob ntawm daim tawv nqaij. Benzophenone-3 thiab benzophenone-4 yog ob qho khoom xyaw tseem ceeb siv hauv cov khoom siv tshuaj pleev thaiv hnub sib txawv.
Benzophenone-3 (Oxybenzone) yog dab tsi?
Benzophenone-3 los yog oxybenzone yog cov organic compound uas muaj cov tshuaj formula C14H12O3Nws muaj nyob rau hauv cov xim daj daj uas tuaj yeem yaj hauv ntau cov kuab tshuaj organic. Tsis tas li ntawd, qhov sib xyaw no belongs rau chav kawm ntawm cov tshuaj tsw qab ketones hu ua benzophenones. Peb tuaj yeem pom benzophenone-3 ib txwm tshwm sim hauv cov paj ntoo. Nws kuj tseem siv tau hauv ntau cov tshuaj pleev thaiv hnub. Ntxiv mus, cov khoom no muaj txiaj ntsig zoo hauv ntau yam yas, khoom ua si, rooj tog zaum, thiab ntau yam khoom siv.
Benzophenone-3 yog ib qho kev sib txuas ntawm cov molecule uas tuaj yeem nqus lub teeb ntawm qis zog hauv kev sib piv rau ntau lwm cov tshuaj tsw qab. Nws muaj ib pawg hydroxyl uas yog hydrogen-bonded rau ketone. Qhov kev sib txuas ntawm hydrogen no tuaj yeem ua rau lub teeb-absorption zog ntawm cov compound no. Cov cuab yeej tshwj xeeb no ua rau nws muaj qhov tsim nyog hauv cov khoom siv tshuaj pleev thaiv hnub.
Txoj kev loj ntawm kev tsim benzophenone-3 yog Friedel-Crafts cov tshuaj tiv thaiv ntawm benzoyl chloride nrog 3-methoxyphenol. Cov molar loj ntawm benzophenone-3 yog 228.24 g / mol. Nws melting point yog 62 ° C, thaum lub boiling point ntawm 224-227 ° C. Qhov ceev ntawm benzophenone-3 yog hais txog 1.20 g / cm 3 Lub ntsiab lus ntawm qhov sib xyaw no yog 140.5 ° C. Qhov no txhais tau hais tias 140.5 degrees Celsius yog qhov kub qis tshaj plaws uas cov kua hauv lub xeev ntawm qhov sib xyaw no muab tawm vapor hauv ib qho uas muaj peev xwm tsim tau cov pa hluav taws xob / cua sib tov.
Daim duab 01: Cov Qauv Tshuaj ntawm Benzophenone-3
Muaj ntau yam kev siv benzophenone-3, uas suav nrog kev siv cov tshuaj no hauv cov yas ua lub teeb UV absorber thiab stabilizer. Ntxiv mus, peb tuaj yeem siv nws nrog rau lwm cov benzophenones los siv rau hauv cov tshuaj pleev thaiv hnub, tshuaj pleev plaub hau, thiab daim ntawv thov kom zoo nkauj. Qhov no feem ntau yog vim tias cov tshuaj no tuaj yeem tiv thaiv kev puas tsuaj los ntawm kev raug tshav ntuj. Tsis tas li ntawd, peb tuaj yeem pom cov khoom xyaw no hauv cov ntsia thawv polish. Oxybenzone kuj tseem ceeb raws li cov duab stabilizer rau cov khoom siv hluavtaws.
Benzophenone-4 yog dab tsi?
Benzophenone-4 yog cov organic compound uas muaj cov tshuaj formula C14H12O6 S. Nws tseem hu ua sulisobenzone, thiab nws yog ib qho khoom siv hauv cov khoom siv tshuaj pleev thaiv hnub uas tuaj yeem tiv thaiv peb ntawm kev puas tsuaj los ntawm UVB thiab UVA lub teeb rays. Cov molar mass ntawm no compound yog 308.31 g / mol. Lub melting point ntawm no compound yog 145 degrees Celsius thaum lub boiling point yog 491 degrees Celsius. Peb tuaj yeem faib nws raws li sulfonic acid compound, thiab nws muaj cov dej tsis zoo hauv dej.
Daim duab 02: Cov Qauv Tshuaj ntawm Benzophenone-4
Raws li Cosmetic Ingredient Review cov kws tshaj lij kev tshawb fawb vaj huam sib luag, cov khoom siv no thiab lwm yam khoom siv ntawm benzophenone muaj kev nyab xeeb raws li feem ntau siv hauv cov tshuaj pleev ib ce thiab cov khoom tu tus kheej. Txawm li cas los xij, cov tshuaj no nyob rau hauv ntau dua tuaj yeem ua rau tsis tu ncua, bioaccumulative, thiab tshuaj lom. Yog li ntawd, lawv tuaj yeem cuam tshuam rau kev mob qog noj ntshav, kev cuam tshuam ntawm endocrine, thiab cov kab mob hauv nruab nrog cev. Vim li no, cov khoom xyaw no raug txwv tsis pub siv rau hauv ntim khoom noj thiab kev lag luam khoom noj hauv Asmeskas.
Qhov txawv ntawm Benzophenone-3 thiab Benzophenone-4 yog dab tsi?
Benzophenone-3 thiab benzophenone-4 yog derivatives ntawm benzophenone. Qhov sib txawv tseem ceeb ntawm benzophenone-3 thiab benzophenone-4 yog tias nyob rau hauv cov khoom xyaw tshuaj pleev thaiv hnub, benzophenone-3 tuaj yeem siv hauv 6% concentration lossis qis dua, whereas benzophenone-4 yog siv hauv 10% concentration lossis qis dua.
Cov hauv qab no qhia txog qhov sib txawv ntawm benzophenone-3 thiab benzophenone-4 hauv daim ntawv teev npe rau kev sib piv ntawm ib sab.
Summary – Benzophenone-3 vs Benzophenone-4
Benzophenone-3 los yog oxybenzone yog cov organic compound uas muaj cov tshuaj formula C14H12O3Benzophenone-4 yog cov organic compound uas muaj cov tshuaj formula C14H12O6S. Qhov sib txawv tseem ceeb ntawm benzophenone-3 thiab benzophenone-4 yog tias nyob rau hauv cov khoom xyaw tshuaj pleev thaiv hnub, benzophenone-3 tuaj yeem siv hauv 6% concentration lossis qis dua, whereas benzophenone-4 yog siv hauv 10% concentration lossis qis dua.
