(±) -6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid Cas: 53188-07-1 phofo
| Nomoro ea lethathamo | XD90174 |
| Lebitso la Sehlahiswa | (±) -6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid |
| CAS | 53188-07-1 |
| Foromo ea limolek'hule | C14H18O4 |
| Boima ba Molek'hule | 250.29 |
| Lintlha tsa polokelo | Ambient |
Tlhaloso ea Sehlahisoa
| Ponahalo | phofo |
| Assay | 99% |
| Botenya | 1.219±0.06 g/cm3 (20 ºC 760 Torr), |
| Sebaka se qhibilihang | 187-189 °C (hote.) |
| Ntho e belang | 313.42°C (khakanyo e boima) |
| flash point | 171°C |
| Lenane la refractive | 1.4970 (khakanyo) |
| Solubility | E qhibiliha hanyenyane haholo (0.58 g/L) (25 ºC) |
| Solubility | e qhibilihang ka metsi hanyane |
KAKARETSO: Quinol dimethacrylate ke vithamine E e qhibilihang ka metsing. Livithamini tse qhibilihang metsing ke sehlopha sa metsoako ea lintho tse phelang tse hlokahalang bakeng sa ho boloka mesebetsi e tloaelehileng ea bophelo ba 'mele oa motho 'me e hloka tse fokolang.Quinol dimethacrylate e ka lokisoa ho tloha 1,4-dihydroxy-2,3,5-trimethylbenzene, aqueous formalin le methyl methacrylate e le lisebelisoa tsa ho qala.
Boitokisetso: Ka sejaneng sa khalase sa 200mL se nang le condenser, eketsa 16.7g (59.1mmolCCM, bohloeki ba lik'hemik'hale: 93.5%) ho CCM e lokiselitsoeng ka holimo), beha 16.7g methanol, 3.3g (82.5mmol) ea NaOH le 50 g ea metsi. , 'me motsoako o ile oa kenngoa ho hydrolysis ea ester ka 80 °C tlas'a moea oa nitrogen.Hlohlelletsa hora e le 'ngoe ka ho hlohlelletsa.Tharollo ea karabelo e ne e tlhotliloeng ka mocheso o tšoanang ho tlosa lintho tse sa tsitsang, ebe e eketsoa ka lerotholi ho tharollo ea asiti e fumanoeng ka ho qhibiliha 11.7 g (85.9 mmol) ea potasiamo hydrogen sulfate ka 50 g ea metsi ka hora e le 'ngoe.Boloka mocheso oa 80°C.ka sejaneng sa khalase sa 300 ml se kentsoeng ka condenser.Ka mor'a hore phekolo ea neutralization e phethoe, likristale li ile tsa theoha hang-hang ha ho sisinyeha ho emisoa, 'me motsoako oa karabelo o ile oa lumelloa ho ema.Likristale li ne li tlhotliloeng ka 80 ° C, li hlatsuoa habeli ka 50 mL ea metsi, ebe li omisoa ka vacuum ka 80 ° C.Boitšoaro bo ile ba etsoa lihora tse 24 ho fumana 14.5 g (57.9 mmol) ea 6-hydroxy-2,5,7,8-tetramethylbenzo-2-carboxylic acid, quinodimethacrylate (eo hamorao e tla bitsoa CCA) ( chai: 98.3%), bohloeki ba lik'hemik'hale: 99,7%).
Ts'ebetso ea Likokoana-hloko: Trolox ke analoge e qhibilihang ka metsing ea vithamine E e nang le thepa e matla ea antioxidant.Trolox e boetse ke inhibitor e matla ea tšenyo ea lera.
Lisebelisoa: Antioxidant e nkiloeng ho vithamine E e qhibilihang ka metsing e nang le li-radicals tsa mahala le ts'ebetso ea antioxidant.
