L-threo-Hexo-2,3-diulosono-1,4-lacton
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- CAS-Nr.
- 490-83-5
- Bezeichnung:
- L-threo-Hexo-2,3-diulosono-1,4-lacton
- Englisch Name:
- DEHYDROASCORBIC ACID
- Synonyma:
- Dehydroascorbate;DEHYDRO-L-ASCORBIC ACID;BIS-DHA;C05422;ehydroascorbicaci;L-Dehydroascorbate;OXIDIZED VITAMIN C;DEHYDROASCORBIC ACID;Oxidized Ascorbic Acid;L-ASCORBIC ACID OXIDIZED
- CBNumber:
- CB1397000
- Summenformel:
- C6H6O6
- Molgewicht:
- 174.11
- MOL-Datei:
- 490-83-5.mol
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L-threo-Hexo-2,3-diulosono-1,4-lacton Eigenschaften
- Schmelzpunkt:
- 228 °C (dec.)(lit.)
- alpha
- D20 +56°
- Siedepunkt:
- 389.3±38.0 °C(Predicted)
- Dichte
- 1.743±0.06 g/cm3(Predicted)
- storage temp.
- -20°C
- L?slichkeit
- DMSO (Slightly, Heated), Methanol (Slightly, Sonicated)
- Aggregatzustand
- Solid
- pka
- 3.90(at 25℃)
- Farbe
- White to Dark Orange
- Merck
- 13,2886
- Stabilit?t:
- Light Sensitive
- LogP
- -1.702 (est)
- CAS Datenbank
- 490-83-5(CAS DataBase Reference)
Sicherheit
- Risiko- und Sicherheitserkl?rung
- Gefahreninformationscode (GHS)
| Kennzeichnung gef?hrlicher |
Xn |
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| R-S?tze: |
22 |
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| WGK Germany |
3 |
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| F |
1-8-10 |
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| HS Code |
2936270000 |
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| Bildanzeige (GHS) |
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| Alarmwort |
Warnung |
| Gefahrenhinweise |
| Code |
Gefahrenhinweise |
Gefahrenklasse |
Abteilung |
Alarmwort |
Symbol |
P-Code |
| H302 |
Gesundheitssch?dlich bei Verschlucken. |
Akute Toxizit?t oral |
Kategorie 4 |
Warnung |
![GHS hazard pictograms]() src="/GHS07.jpg" width="20" height="20" /> |
P264, P270, P301+P312, P330, P501 |
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| Sicherheit |
| P264 |
Nach Gebrauch gründlich waschen. |
| P264 |
Nach Gebrauch gründlich waschen. |
| P270 |
Bei Gebrauch nicht essen, trinken oder rauchen. |
| P501 |
Inhalt/Beh?lter ... (Entsorgungsvorschriften vom Hersteller anzugeben) zuführen. |
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L-threo-Hexo-2,3-diulosono-1,4-lacton Chemische Eigenschaften,Einsatz,Produktion Methoden
Chemische Eigenschaften
Orange Solid
Verwenden
The reversibly oxidized form of ascorbic acid.
Definition
ChEBI: Dehydroascorbic acid having the L-configuration.
l?uterung methode
Crystallise dehydro-L(+)-ascorbic acid from MeOH. The anhydrous acid is formed by heating it in a vacuum at 100o/1hour to give a crisp glassy product which when shaken with absolute EtOH and then kept at 0o for 2days gives microcrystals of the anhydrous acid. This is then washed with absolute EtOH and dried in a vacuum. It has m 225o(dec) and is stable in acidic solution but decomposes rapidly in alkaline solution. A 1% solution of the anhydrous acid when dissolved in phthalate/HCl buffer pH 3.5 at 60o and cooled to 20o has [] 20D +56o(0minutes), +53.5o(2hours), +19o(3days), -2o(5days) and -6o(6days); then it becomes orange in colour. A freshly prepared 1% solution in H2O has [] D +50o(0minutes), +44o(2hours), +16o(3days) and 0o(5days). [Herbert et al. J Chem Soc 1270 1933, Kenyon et al. J Chem Soc 158 1948, Beilstein 18/5 V 411.]
L-threo-Hexo-2,3-diulosono-1,4-lacton Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
L-threo-Hexo-2,3-diulosono-1,4-lacton Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.
Global( 171)Lieferanten
490-83-5(L-threo-Hexo-2,3-diulosono-1,4-lacton)Verwandte Suche:
Dinatriumsulfid
[2R*(4R*,8R*)]-(±)-3,4-Dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-benzopyran-6-ol
2-(Acetyloxy)benzoes?ure
Ascorbinsure
L-threo-Hexo-2,3-diulosono-1,4-lacton
Hexan-2,3-dion
β-Oxo-γ-butyrolacton
2-Methyltetrahydrofuran-3-on
- (5R)-5β-[(S)-1,2-Dihydroxyethyl]tetrahydrofuran-2,3,4-trione
- C05422
- L-Dehydroascorbate
- L-threo-2,3-Hexodiulosonic Acid γ-Lactone
- Oxidized Ascorbic Acid
- L-ASCORBIC ACID OXIDIZED
- DEHYDROASCORBIC ACID
- DEHYDRO-L(+)-ASCORBIC ACID, DIMER
- BIS-DEHYDRO-L-ASCORBIC ACID
- OXIDIZED VITAMIN C
- L-(+)-Dehydroascorbic Acid (1.24728)
- L-threo-hexo-2,3-diulosono-1,4-lactone
- L-threo-2,3-Hexodiulosonic acid, .gamma.-lactone
- 5-(1,2-dihydroxyethyl)oxolane-2,3,4-trione
- DEHYDROASCORBIC ACID(RG)
- L-(+)-DEHYDROASCORBICACID
- Ascorbic Acid Impurity 18
- (5R)-5-[(1S)-12-dihydroxyethyl]oxolane-234-trione
- L-threo-2,3-Hexodiulosonic acid, g-lactone
- (R)-5-((S)-1,2-dihydroxyethyl)furan-2,3,4(5H)-trione
- ehydroascorbicaci
- DEHYDROASCORBIC ACID USP/EP/BP
- TIANFUCHEM--High purity 490-83-5 DEHYDROASCORBIC ACID
- Dehydroascorbate
- DEHYDRO-L-ASCORBIC ACID
- BIS-DHA
- 13C6]-(L)-Dehydroascorbic acid
- 1R-(1α,4aβ,10aα)]-1,2,3,4,4a,9,10,10a-octahydro-7-isopropyl-1,4a-dimethylphenanthren-1-carboxylic acid
- 490-83-5
- C8H10O6
- Specialty Synthesis
- Monosaccharides
- Carbohydrate Synthesis
- KETONE
- Carbohydrates & Derivatives
- Intermediates & Fine Chemicals
- Pharmaceuticals
- Carbohydrate Synthesis
- Monosaccharides
- Specialty Synthesis
