(±)-6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid Cas:53188-07-1 pa'u
Numera Fa'amaumauga | XD90174 |
Igoa Oloa | (±)-6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid |
CAS | 53188-07-1 |
Fuafua mole | C14H18O4 |
Molecular Weight | 250.29 |
Fa'amatalaga Teuina | Ambient |
Fa'amatalaga o oloa
Fa'aaliga | pauta |
Asay | 99% |
Malosi | 1.219±0.06 g/cm3 (20 ºC 760 Torr), |
Liu liusuavai | 187-189 °C (malamalama) |
Fa'apuna | 313.42°C (fa'atatau fa'atatau) |
Fa'ailoga moli | 171°C |
Fa'ailoga fa'afofo | 1.4970 (fa'atatau) |
Solubility | E matua'i solu (0.58 g/L) (25 ºC) |
Solubility | solu vai itiiti |
VAAIGA AOAO: Quinol dimethacrylate o se vai-soluble vaitamini E. Vai-soluble vitamini o se vasega o mea faʻapipiʻi e taua tele mo le tausia o gaioiga masani o le olaga o le tino o le tagata ma manaʻomia le itiiti ifo.Quinol dimethacrylate e mafai ona saunia mai le 1,4-dihydroxy-2,3,5-trimethylbenzene, aqueous formalin ma le methyl methacrylate e avea ma mea amata.
Sauniuniga: I totonu o se pusa tioata 200mL ua faʻapipiʻiina i se condenser, faʻaopopo le 16.7g (59.1mmolCCM, vailaʻau mama: 93.5%) i totonu o le CCM ua saunia i luga), tuʻu le 16.7g methanol, 3.3g (82.5mmol) o le NaOH ma le 50 g o le vai. , ma o le paluga na faia i le hydrolysis o le ester i le 80 °C i lalo o le ea o le nitrogen.Faʻafefe mo le itula e tasi ma faʻafefe.O le vaifofo tali na faʻamamaina i le vevela lava e tasi e aveese ai mea e le mafai ona faʻaaogaina, ona faʻaopopoina lea o le pa'ū i se vaifofo acidic na maua e ala i le faʻamavaeina o le 11.7 g (85.9 mmol) o le potassium hydrogen sulfate i le 50 g o le vai i le tasi itula.Taofi ile 80°C.i totonu o se pusa tioata 300 ml faʻapipiʻi i se condenser.Ina ua maeʻa le togafitiga o le neutralization, na vave ona tafe mai tioata pe a taofi le faʻamalosi, ma faʻatagaina le paluga tali e tu.O tioata na faʻamama i le 80 ° C, fufulu faalua i le 50 mL o le vai, ona faʻamago lea i lalo o le masini i le 80 ° C.O le tali na faia mo le 24 itula e maua ai le 14.5 g (57.9 mmol) o le 6-hydroxy-2,5,7,8-tetramethylbenzo-2-carboxylic acid, quinodimethacrylate (lea e taʻua mulimuli ane o CCA) (Auina: 98.3%, mama vailaʻau: 99.7%).
Gaoioiga Fa'alesoifua maloloina: Trolox o se analog vai-soluble o le vaitamini E faʻatasi ai ma mea faʻamalosi malosi.O le Trolox o se faʻalavelave malosi foi o le faaleagaina o membrane.
Fa'aoga: Ose antioxidant e maua mai vai-soluble vaitamini E fa'atasi ai ma fa'ama'i fa'ama'i fa'asa'oloto ma gaioiga fa'amasani.