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HomeProduct name listDEHYDROASCORBIC ACID

DEHYDROASCORBIC ACID

Synonym(s):Bis(dehydro-L-ascorbic acid);Bis-DHA;DHA

  • CAS NO.:490-83-5
  • Empirical Formula: C6H6O6
  • Molecular Weight: 174.11
  • MDL number: MFCD00066467
  • EINECS: 207-720-6
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-19 23:02:33
DEHYDROASCORBIC ACID Structural

What is DEHYDROASCORBIC ACID?

Chemical properties

Orange Solid

The Uses of DEHYDROASCORBIC ACID

The reversibly oxidized form of ascorbic acid.

What are the applications of Application

L-Dehydro Ascorbic Acid is the reversibly oxidized form of ascorbic acid

Definition

ChEBI: Dehydroascorbic acid having the L-configuration.

Purification Methods

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.]

Properties of DEHYDROASCORBIC ACID

Melting point: 228 °C (dec.)(lit.)
Boiling point: 389.3±38.0 °C(Predicted)
alpha  D20 +56°
Density  1.743±0.06 g/cm3(Predicted)
storage temp.  -20°C
solubility  DMSO (Slightly, Heated), Methanol (Slightly, Sonicated)
pka 3.90(at 25℃)
form  Solid
color  White to Dark Orange
Merck  13,2886
Stability: Light Sensitive
CAS DataBase Reference 490-83-5(CAS DataBase Reference)

Safety information for DEHYDROASCORBIC ACID

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H302:Acute toxicity,oral
Precautionary Statement Codes P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P270:Do not eat, drink or smoke when using this product.
P501:Dispose of contents/container to..…

Computed Descriptors for DEHYDROASCORBIC ACID

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