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Ngoku abantu banokhetho oluninzi kukhathalelo lwesikhumba, izithako nje ze-sunscreen zingaphezulu kweentlobo ze-10, kodwa ezinye iimveliso zokhathalelo lwesikhumba zibonakala ngathi ukhathalelo lwesikhumba ngokwenene luya kwenzakalisa ulusu lwethu. Ngoko ke sikhetha njani iimveliso zokukhathalela ulusu olulusu lwethu? Makhe sithethe nge-benzophenone-4, isithako esibalulekileyo kwiimveliso zokunakekelwa kwesikhumba.

Yintoni i-benzophenone-4?

Benzophenone-4i-benzophenone compound, ebizwa ngokuba yi-BP-4, i-chemical formula C14H12O6S. Ngumgubo omhlophe okanye okhanyayo otyheli kwiqondo lobushushu begumbi kwaye unokufunxa ngokufanelekileyo ukukhanya kwe-UV ye-285 ukuya kwi-325 Im. Njengoko i-absorption ye-ultraviolet ebanzi, i-BP-4 ineenzuzo zezinga eliphezulu lokufunxa, i-non-toxic, i-non-teratogenic effect, ukukhanya okulungileyo kunye nokuzinza kwe-thermal, njl., i-UV absorber BP-4 inokufunxa i-UV-A kunye ne-UV-B. ngelo xesha, yiklasi I sunscreen evunyiweyo yi-United States FDA, iUnited States kunye namazwe aseYurophu ane-frequency ephezulu yokusetyenziswa, esetyenziswa kakhulu kwi-sunscreen cream kunye nezinye izithambiso zelanga.

I-Uv absorbent BP-4ayinayo ityhefu, ayinakutsha, ayiqhumisi, kulula ukufunxa ukufuma emoyeni, intsebenzo ebalaseleyo ye-acidic emanzi efunxayo ye-UV, inokufunxa ngamandla ukukhanya kwe-UV. Isetyenziswa ngokubanzi njenge-absorber ultraviolet yokwaleka kwepolymer esekelwe kumanzi kunye nepeyinti emfusa ukukhusela i-oxidation ye-photocatalytic ye-polymer esekelwe emanzini kunye nepeyinti emfusa; Sisikhuseli elangeni esilungileyo sezithambiso kunye nesibambisi seUV sokuphucula ukuxhathisa kwemozulu yamalaphu oboya.

I-Benzophenone isetyenziswa ngokubanzi kwizinto zasekhaya ezifana nezibuko zelanga, ukupakishwa kokutya, impahla yokuhlamba kunye neemveliso zokucoca ukukhusela kwi-UV exposure. Ingangcolisa amanzi okusela kwaye ifuduke isuka kwipakethe yokutya iye ekutyeni. I-Benzophenone isetyenziswa kwezinye ii-inki zokupakisha ukutya kwaye inokufudukela ekutyeni. Ibenzophenone yenzeka ngokwendalo ekutyeni okuthile (okufana nediliya ye wayini kunye ne Muscat) kwaye yongezwa kwezinye njenge ncasa.

Kwiimveliso zokhathalelo lomntu, i-benzophenone isetyenziswa njengesiphuculi sevumba okanye ukuthintela iimveliso ezinjengesepha ekuphulukaneni nevumba elimnandi kunye nombala phantsi kokukhanya kwe-ultraviolet. Benzophenone derivatives ezifana BP2 kunye oxybenzone (BP3) kunyei-benzophenone-4 (BP-4)zisetyenziswa kwi sunscreens. I-Oxybenzone isetyenziswa njenge-absorbent ye-ultraviolet kunye ne-stabilizer, ngakumbi kwiiplastiki kunye ne-sunscreens. I-Benzophenone kunye ne-oxybenzone nazo zisetyenziswa kwi-nail polish kunye ne-lip balm.

Isetyenziselwa ntoni i-benzophenone-4 kukhathalelo lwesikhumba?

I-Uv absorbent BP-4 ineenzuzo zokukhanya okulungileyo kunye nokuzinza kobushushu, kwaye isetyenziswa ngokubanzi kwi-sunscreen cream, i-cream, i-honey, i-lotion, i-oyile kunye nezinye izithambiso ze-sunscreen. Ngokukodwa ngokufanelekileyo kwi-sunscreen, i-lotion, ipeyinti, i-dosage jikelele yi-0.1-0.5%. Umlinganiselo oqhelekileyo ngu-0.2-1.5%.

Isithambisi seUvBP-4i-soluble ngokulula emanzini, kwaye isisombululo esinamanzi si-acidic, ngoko ke kufuneka singathathi hlangothi ngexesha lokusetyenziswa. Isisombululo se-PH esikhulu kune-9 siya kubangela ukuba ubude be-absorption bube buncinci, ukusetyenziswa okuphambili kwe-sunscreen yemihla ngemihla kunye nezinye iimveliso zokunakekelwa kwesikhumba ukukhusela ukuguga kwesikhumba okubangelwa ukukhanya kwe-ultraviolet.

Isetyenziselwa ntoni i-benzophenone-4 kukhathalelo lwesikhumba?