(±)-6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid CAS: 53188-07-1 hmoov
| Catalog Number | xwm 90174 |
| Khoom npe | (±) -6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid |
| CAS | 53188-07-1 |
| Molecular Formula | C14H18O4 |
| Molecular Luj | 250.29 Nws |
| Cov ntaub ntawv khaws cia | Ambient |
Khoom Specification
| Qhov tshwm sim | hmoov |
| Assay | 99% |
| Qhov ntom | 1.219 ± 0.06 g / cm3 (20 ºC 760 Torr), |
| Melting point | 187-189 ° C (lit.) |
| Boiling point | 313.42°C (kev kwv yees kwv yees) |
| Flash point | 171 ° C |
| Refractive Index | 1.4970 (kwv yees) |
| Solubility | Soluble me ntsis (0.58 g / L) (25 ºC) |
| Solubility | me ntsis dej soluble |
TSEEM CEEB: Quinol dimethacrylate yog dej-soluble vitamin E. Dej-soluble vitamins yog ib chav kawm ntawm cov organic tebchaw uas yog indispensable rau kev tswj lub neej ib txwm ua ub no ntawm tib neeg lub cev thiab yuav tsum tau tsawg dua.Quinol dimethacrylate tuaj yeem npaj los ntawm 1,4-dihydroxy-2,3,5-trimethylbenzene, aqueous formalin thiab methyl methacrylate ua cov khoom pib.
Kev npaj: Hauv 200mL iav ntim ntim nrog lub condenser, ntxiv 16.7g (59.1mmolCCM, tshuaj purity: 93.5%) rau hauv CCM npaj saum toj no), muab 16.7g methanol, 3.3g (82.5mmol) NaOH thiab 50 g dej. , thiab qhov sib tov tau raug hydrolysis ntawm ester ntawm 80 ° C hauv qab cua nitrogen.Do rau ib teev nrog stirring.Cov tshuaj tiv thaiv tau lim nyob rau tib qhov kub thiab txias kom tshem tawm cov teeb meem insoluble, thiab tom qab ntawd ntxiv dropwise rau cov kua qaub uas tau los ntawm kev sib cais 11.7 g (85.9 mmol) ntawm poov tshuaj hydrogen sulfate hauv 50 g ntawm dej tshaj li ib teev.Khaws ntawm 80 ° C.hauv 300 ml iav ntim nrog lub condenser.Tom qab kev kho neutralization tiav lawm, cov muaju precipitated tam sim ntawd thaum nplawm tau nres, thiab cov tshuaj tiv thaiv sib tov raug tso cai sawv ntsug.Cov crystals tau lim ntawm 80 ° C, ntxuav ob zaug nrog 50 mL dej, thiab tom qab ntawd qhuav hauv lub tshuab nqus tsev ntawm 80 ° C.Cov tshuaj tiv thaiv tau ua tiav rau 24 teev kom tau 14.5 g (57.9 mmol) ntawm 6-hydroxy-2,5,7,8-tetramethylbenzo-2-carboxylic acid, quinodimethacrylate (tom qab no hu ua CCA) (Yield: 98.3%, Tshuaj purity: 99.7%).
Kev Ua Txhaum Cai: Trolox yog cov dej-soluble analog ntawm vitamin E nrog cov khoom muaj zog antioxidant.Trolox kuj tseem muaj zog inhibitor ntawm daim nyias nyias.
Kev Siv: Ib qho tshuaj tiv thaiv antioxidant tau los ntawm dej-soluble vitamin E nrog dawb radical scavenging thiab antioxidant kev ua.
