(±) -6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid Cas:53188-07-1 powder
| Inombolo Yekhathalogi | XD90174 |
| Igama Lomkhiqizo | (±) -6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid |
| I-CAS | 53188-07-1 |
| I-Molecular Formula | I-C14H18O4 |
| Isisindo samangqamuzana | 250.29 |
| Imininingwane Yesitoreji | I-ambient |
Ukucaciswa Komkhiqizo
| Ukubukeka | impushana |
| U-Asay | 99% |
| Ukuminyana | 1.219±0.06 g/cm3 (20 ºC 760 Torr), |
| Iphoyinti lokuncibilika | 187-189 °C (okhanyisiwe) |
| Iphuzu elibilayo | 313.42°C (isilinganiso esinzima) |
| Iphoyinti le-Flash | 171°C |
| Inkomba ye-refractive | 1.4970 (isilinganiso) |
| Ukuncibilika | Incibilika kancane kakhulu (0.58 g/L) (25 ºC) |
| Ukuncibilika | kancane encibilikayo emanzini |
I-Quinol dimethacrylate iwuvithamini E oncibilika emanzini. Amavithamini ancibilikayo emanzini ayisigaba sezinhlanganisela eziphilayo ezibaluleke kakhulu ekugcineni imisebenzi evamile yokuphila komzimba womuntu futhi ezidinga kancane.I-Quinol dimethacrylate ingalungiswa kusuka ku-1,4-dihydroxy-2,3,5-trimethylbenzene, i-formalin emanzi kanye ne-methyl methacrylate njengezisetshenziswa zokuqala.
Ukulungiselela: Esitsheni sengilazi esingu-200mL esifakwe i-condenser, engeza u-16.7g (59.1mmolCCM, ukuhlanzeka kwamakhemikhali: 93.5%) ku-CCM elungiselelwe ngenhla), faka i-methanol engu-16.7g, 3.3g (82.5mmol) ye-NaOH no-50 g wamanzi. , futhi ingxube ibe ngaphansi kwe-hydrolysis ye-ester ku-80 °C ngaphansi komkhathi we-nitrogen.Govuza ihora elilodwa ngokuvuselela.Isixazululo sokusabela sahlungwa ngezinga lokushisa elifanayo ukuze kukhishwe izinto ezingancibiliki, bese kwengezwa i-dropwise kwisisombululo esine-asidi esitholwe ngokuncibilikisa u-11.7 g (85.9 mmol) we-potassium hydrogen sulfate ku-50 g wamanzi phezu kwehora elilodwa.Gcina ku-80°C.esitsheni sengilazi esingu-300 ml esifakwe i-condenser.Ngemva kokuqedwa kokwelashwa kwe-neutralization, amakristalu ancipha ngokushesha lapho ukugqugquzela kumisiwe, futhi ingxube yokusabela yavunyelwa ukuma.Amakristalu ahlungwa ku-80 ° C, ahlanjwe kabili ngamanzi angu-50 mL, bese omiswa ngaphansi kwe-vacuum engu-80 ° C.Ukusabela kwenziwa amahora angama-24 ukuze kutholwe u-14.5 g (57.9 mmol) we-6-hydroxy-2,5,7,8-tetramethylbenzo-2-carboxylic acid, i-quinodimethacrylate (ngemuva kwalokhu ebizwa ngokuthi i-CCA) ( Isivuno: 98.3%, ukuhlanzeka kwamakhemikhali: 99.7%).
Umsebenzi Wezinto Eziphilayo: I-Trolox iyi-analog encibilika emanzini kavithamini E enezici ezinamandla zokulwa ne-antioxidant.I-Trolox nayo iyi-inhibitor enamandla yokulimala kwe-membrane.
Ukusetshenziswa: I-antioxidant etholakala kuvithamini E oncibilikayo emanzini ngokukhipha ama-radical mahhala kanye nomsebenzi wokulwa ne-antioxidant.
