Vithamine C (Ascorbic Acid) Cas: 50-81-7
| Nomoro ea lethathamo | XD91869 |
| Lebitso la Sehlahiswa | Vithamine C (ascorbic acid) |
| CAS | 50-81-7 |
| Foromo ea molek'hulela | C6H8O6 |
| Boima ba Molek'hule | 176.12 |
| Lintlha tsa polokelo | 5-30°C |
| Khoutu ea Lekhetho e Kopantsoeng | 29362700 |
Tlhaloso ea Sehlahisoa
| Ponahalo | Phofo e tšoeu |
| Assay | 99% mets |
| Sebaka se qhibilihang | 190-194 °C (Dec.) |
| alpha | 20.5 º (c=10,H2O) |
| Ntho e belang | 227.71°C (khakanyo e boima) |
| tekano | 1,65 g/cm3 |
| index ea refractive | 21 ° (C=10, H2O) |
| ho qhibiliha | H2O: 50 mg/mL ho 20 °C, e hlakileng, e batla e se na mebala |
| pka | 4.04, 11.7(ho 25℃) |
| PH | 1.0 - 2.5 (25℃, 176g/L ka metsing) |
| PH Range | 1 - 2.5 |
| Monko o monate | Ha e na monko |
| tshebetso ya mahlo | [α]25/D 19.0 ho 23.0°, c = 10% ho H2O |
| Ho qhibiliha ha Metsi | 333 g/L (20 ºC) |
| Botsitso | E tsitsitseng.E ka ba le khanya e fokolang kapa e sa ameheng moeeng.Ha e lumellane le li-oxidizing agents, alkali, tšepe, koporo. |
Sebaka sa ho qala sa vithamine C ke khetho ea oxidation ea motsoako oa tsoekere D-sorbit ho L-sorbose o sebelisa libaktheria tsa Acetobacter suboxidans.L-sorbose ebe e fetoleloa ho L-ascorbic acid, e tsejoang hamolemo e le vithamine C.
Matsoai a sodium, potasiamo le k'halsiamo a ascorbic acid a bitsoa ascorbates 'me a sebelisoa e le lintho tse bolokang lijo.Ho etsa ascorbic acid e qhibilihang ka mafura, e ka etsoa esterified.Li-ester tsa ascorbic acid le acid, tse kang palmitic acid ho etsa ascorbyl palmitate le stearic acid ho etsa ascorbic stearate, li sebelisoa e le li-antioxidants lijong, meriana le litlolo.Ascorbic acid e boetse e bohlokoa ho metabolism ea li-amino acid tse ling.E thusa ho sireletsa lisele ho tsoa tšenyo ea radical mahala, e thusa ho monya tšepe, 'me e bohlokoa bakeng sa lits'ebetso tse ngata tsa metabolic.
Vithamine C ke anti-oxidant e tsebahalang haholo.Tšusumetso ea eona ho sebopeho sa mahala-radical ha e sebelisoa ka holimo ho letlalo ka tranelate ha e e-s'o thehoe ka ho hlaka.Katleho ea li-topical applications e 'nile ea belaelloa ka lebaka la ho se tsitse ha vithamine C (e sebetsana le metsi le ho senya).Ho boleloa hore mefuta e meng e na le botsitso bo betere mekhoeng ea metsi.Li-analogues tsa maiketsetso tse kang magnesium ascorbyl phosphate ke tse ling tsa tse nkoang li sebetsa haholoanyane, kaha li atisa ho tsitsa.Ha ho hlahlojoa bokhoni ba eona ba ho loants'a tšenyo ea mahala-radical ho latela phello ea eona ea synergistic le vithamine E, vithamine C ea khanya.Ha vithamine E e arabela ka radical ea mahala, le eona, e senngoa ke radical ea mahala eo e e loanang.Vithamine C e kena ho lokisa tšenyo ea mahala-radical ho vithamine E, e lumellang e ho tsoela pele ka mesebetsi ea eona ea ho hloekisoa ka bolokolohi.Liphuputso tsa nakong e fetileng li bontšitse hore vithamine C e ngata e sebelisoang ka holimo ke photoprotective, 'me ho hlakile hore ho lokisoa ha vithamine ho sebelisoa lithutong tsena ho hanyetsa sesepa le metsi, ho hlatsoa kapa ho hohla matsatsi a mararo.Lipatlisiso tse ling tsa morao-rao li bontšitse hore vithamine C e eketsa tšireletso khahlanong le tšenyo ea UVB ha e kopantsoe le lik'hemik'hale tse sireletsang letsatsi tsa UVB.Sena se ne se tla etsa hore motho a fihlele qeto ea hore ha e kopantsoe le lintho tse tloaelehileng tse sireletsang letlalo letsatsing, vithamine C e ka ’na ea fana ka tšireletso e tšoarellang nako e telele le e pharaletseng haholoanyane letsatsing.Hape, tšebelisano lipakeng tsa vithamine C le e e ka fana ka litholoana tse ntle le ho feta, kaha ho hlakile hore motsoako oa bobeli o fana ka tšireletso e ntle haholo tšenyong ea UVB.Leha ho le joalo, vithamine C e bonahala e le betere haholo ho feta e ho sireletsa khahlanong le tšenyo ea UVA.Qeto e ’ngoe ke hore motsoako oa vithamine C, e, le setlolo se sireletsang letlalo letsatsing se fana ka tšireletso e khōloanyane ho feta kakaretso ea tšireletso e fanoang ke leha e le efe ea metsoako e meraro e sebetsang e le ’ngoe.Vithamine C e boetse e sebetsa joalo ka collagen biosynthesis regulator.E tsejoa ho laola metsoako ea li-colloidal tse kang collagen, 'me ha e etsoa likoloing tse nepahetseng, e ka ba le phello e khanyang letlalo.Ho boleloa hore vithamine C e khona ho thusa 'mele hore o be matla khahlanong le maemo a tšoaetsanoang ka ho matlafatsa sesole sa' mele.Ho na le bopaki bo bong (le hoja ho phehisana khang) hore vithamine C e ka feta ka har'a letlalo 'me e khothalletsa pholiso ka har'a lisele tse senyehileng ke ho chesa kapa ho tsoa kotsi.Ka hona, e fumanoa ka mafura a chesang le litlolo tse sebelisoang bakeng sa ho senya.Vithamine C e boetse e tumme ka lihlahisoa tse thibelang botsofali.Liphuputso tsa morao-rao li bontša hore ho na le lintho tse ka 'nang tsa e-ba khahlanong le ho ruruha.
Physiological antioxidant.Coenzyme bakeng sa karabelo e mengata ea hydroxylation;e hlokahalang bakeng sa motsoako oa collagen.E ajoa haholo limela le liphoofolo.Ho ja lijo tse sa lekaneng ho fella ka deficiency syndromes tse kang scurvy.E sebelisoa e le antimicrobial le antioxidant lijong.
