Vitamin C (Ascorbic Acid) Cas: 50-81-7
| Catalog Number | xwm 91869 |
| Khoom npe | Vitamin C (Ascorbic Acid) |
| CAS | 50-81-7 : kuv |
| Molecular Formula | C6H8O6 |
| Molecular Luj | 176.12 Nws |
| Cov ntaub ntawv khaws cia | 5-30 ° C |
| Harmonized tariff Code | 29362700 ib |
Khoom Specification
| Qhov tshwm sim | Dawb hmoov |
| Assay | 99% min |
| Melting point | 190-194 ° C (Lub Kaum Ob Hlis) |
| alpha | 20.5 º (c = 10, H2O) |
| Boiling point | 227.71°C (kev kwv yees) |
| ceev | 1.65g / cm3 |
| Refractive Index | 21 ° (C = 10, H2O) |
| solubility | H2O: 50 mg / mL ntawm 20 ° C, ntshiab, tsis muaj xim |
| pka ua | 4.04, 11.7 (ntawm 25 ℃) |
| PH | 1.0 - 2.5 (25 ℃, 176 g / L hauv dej) |
| PH Range | 1-2.5 |
| tsw | Tsis hnov tsw |
| kev ua haujlwm kho qhov muag | [α] 25 / D 19.0 txog 23.0°, c = 10% hauv H2O |
| Dej Solubility | 333 g / L (20 ºC) |
| Kev ruaj ntseg | ruaj khov.Tej zaum yuav tsis muaj zog lub teeb los yog huab cua rhiab heev.Incompatible nrog oxidizing tus neeg sawv cev, alkalies, hlau, tooj liab. |
Lub ntsiab lus pib rau kev sib txuas ntawm cov vitamin C yog kev xaiv ntawm oxidation ntawm cov suab thaj D-sorbit rau L-sorbose siv cov kab mob Acetobacter suboxidans.L-sorbose tom qab ntawd hloov mus rau L-ascorbic acid, zoo dua lub npe hu ua vitamin C.
Sodium, potassium, thiab calcium ntsev ntawm ascorbic acids hu ua ascorbates thiab siv los ua zaub mov noj.Ua kom ascorbic acid fat-soluble, nws tuaj yeem ua esterified.Esters ntawm ascorbic acid thiab acids, xws li palmitic acid los tsim ascorbyl palmitate thiab stearic acid los tsim ascorbic stearate, yog siv los ua antioxidants hauv zaub mov, tshuaj, thiab tshuaj pleev ib ce.Ascorbic acid kuj tseem ceeb hauv cov metabolism hauv qee cov amino acids.Nws pab tiv thaiv cov hlwb los ntawm kev puas tsuaj dawb radical, pab kev nqus hlau, thiab yog qhov tseem ceeb rau ntau cov txheej txheem metabolic.
Vitamin C yog lub npe hu ua anti-oxidant.Nws cov nyhuv ntawm cov dawb radical tsim thaum topically thov rau ntawm daim tawv nqaij los ntawm ib tug cream tsis tau kom meej meej tsim.Cov txiaj ntsig ntawm cov tshuaj pleev ib ce tau raug nug vim yog vitamin C tsis ruaj khov (nws cuam tshuam nrog dej thiab degrades).Qee cov ntaub ntawv tau hais tias muaj kev ruaj ntseg zoo dua hauv cov tshuab dej.Synthetic analogues xws li magnesium ascorbyl phosphate yog cov uas suav hais tias muaj txiaj ntsig zoo dua, vim tias lawv zoo li ruaj khov dua.Thaum ntsuas nws lub peev xwm los tawm tsam kev puas tsuaj dawb-radical nyob rau hauv lub teeb ntawm nws cov nyhuv synergistic nrog vitamin e, vitamin C ci.Raws li vitamin e reacts nrog ib tug dawb radical, nws, nyob rau hauv lem, puas los ntawm cov dawb radical nws yog sib ntaus sib tua.Vitamin C los kho cov dawb radical puas hauv vitamin e, cia e mus txuas ntxiv nrog nws cov dawb radical scavenging dej num.Cov kev tshawb fawb yav dhau los tau qhia tias muaj cov ntsiab lus ntawm cov tshuaj vitamin C yog cov tshuaj tiv thaiv kab mob, thiab pom tau tias cov vitamin npaj siv hauv cov kev tshawb fawb no tiv thaiv xab npum thiab dej, ntxuav, los yog txhuam rau peb hnub.Ntau qhov kev tshawb fawb tam sim no tau qhia tias vitamin C ntxiv kev tiv thaiv tiv thaiv uVB kev puas tsuaj thaum ua ke nrog uVB tshuaj pleev thaiv hnub.Qhov no yuav ua rau ib qho kev txiav txim siab tias ua ke nrog cov tshuaj pleev thaiv hnub zoo ib yam, vitamin C tuaj yeem tso cai rau ntev-ntev, dav tiv thaiv tshav ntuj.Ib zaug ntxiv, kev sib koom ua ke ntawm cov vitamins C thiab e tuaj yeem ua rau cov txiaj ntsig zoo dua, raws li pom tau tias kev sib xyaw ntawm ob qho tib si muab kev tiv thaiv zoo heev los ntawm kev puas tsuaj uVB.Txawm li cas los xij, vitamin C zoo nkaus li zoo dua li e ntawm kev tiv thaiv kev puas tsuaj ntawm uVA.Ib qho kev txiav txim ntxiv yog tias kev sib xyaw ntawm cov vitamins C, e, thiab tshuaj pleev thaiv hnub muaj kev tiv thaiv ntau dua li cov txiaj ntsig ntawm kev tiv thaiv los ntawm ib qho ntawm peb cov khoom xyaw ua ib leeg.Vitamin C kuj ua raws li collagen biosynthesis regulator.Nws yog paub los tswj intercellular colloidal tshuaj xws li collagen, thiab thaum formulated rau hauv lub tsheb kom zoo, muaj peev xwm ua rau cov tawv nqaij lightening nyhuv.Vitamin C tau hais tias tuaj yeem pab lub cev tiv thaiv kab mob los ntawm kev ntxiv dag zog rau lub cev.Muaj qee cov pov thawj (txawm hais tias sib cav) tias vitamin C tuaj yeem dhau los ntawm cov txheej txheem ntawm daim tawv nqaij thiab txhawb kev kho mob hauv cov ntaub so ntswg puas los ntawm kev kub hnyiab lossis raug mob.Nws yog pom, yog li ntawd, nyob rau hauv hlawv tshuaj pleev thiab cream siv rau abrasions.Vitamin C kuj tseem nrov hauv cov khoom tiv thaiv kev laus.Cov kev tshawb fawb tam sim no qhia tau tias muaj peev xwm tiv thaiv kab mob thiab.
Physiological antioxidant.Coenzyme rau ntau cov tshuaj tiv thaiv hydroxylation;xav tau rau collagen synthesis.Tshaj tawm hauv cov nroj tsuag thiab tsiaj txhu.Kev noj zaub mov tsis txaus ua rau muaj kev tsis txaus ntseeg xws li scurvy.Siv los ua tshuaj tua kab mob thiab antioxidant hauv cov khoom noj.
