Ascorbic acid CAS 50-81-7
| Catalog Number | xwm 92025 |
| Khoom npe | 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) |
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.
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