Name: DEHYDROASCORBIC ACID
SKU: 490-83-5

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Pharmaceutical (44)
Organic Chemicals (10)
Others (10)
Reagent (4)
Plant Extract (2)
Synthetic Flavours & Fragrances (1)

Basic Information

CAS No.:

490-83-5

Name:

DEHYDROASCORBIC ACID

Molecular Structure:

Formula:

C6H6 O6

Molecular Weight:

174.11

Synonyms:

Dehydroascorbicacid, L- (8CI); DHAA; Dehydro-L-ascorbic acid; Dehydroascorbic acid; L-Ascorbicacid, dehydro-; L-Ascorbic acid, oxidized; L-Dehydroascorbic acid;L-threo-Dehydroascorbic acid; Oxidized ascorbic acid; Oxidized vitamin C

Density:

1.743g/cm³

Melting Point:

228 °C (dec.)(lit.)

Boiling Point:

389.3°Cat760mmHg

Flash Point:

170°C

Hazard Symbols:

Risk Codes:

Safety:

WGK Germany	3
F	1-8-10

PSA:

100.90000

LogP:

-2.59680

Synthetic route

: 50-81-7
ascorbic acid

: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
With N-bromosaccharin; acetic acid for 0.0333333h; Ambient temperature;	100%
With hexacyanoferrate(III) In water at 25℃; Mechanism; Rate constant; influence of pH (-1 to 1), ionic strength;
With starch-KI; chloroamine-T Product distribution; conditions for analytical determination, other halogenide used;

: 605-94-7
2,3-Dimethoxy-5-methyl-1,4-benzoquinone

: 50-81-7
ascorbic acid

A: 3066-90-8
2,3-dimethoxy-5-methylbenzene-1,4-diol

B: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
With acetate-phosphate buffer at 25℃; Rate constant; Mechanism; Thermodynamic data; pH 3.0; var. pH; var. temps.; ΔS(excit.), ΔH(excit.), ΔG(excit.);

...Expand

: 3240-34-4
[bis(acetoxy)iodo]benzene

: 50-81-7
ascorbic acid

A: 591-50-4
iodobenzene

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
In water; acetic acid at 31.9℃; Thermodynamic data; Kinetics; Mechanism; velocity constants, further temp., var. conc. of educts, activation energy, formation konstant K, ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔS, ΔG, effect of variation of solvent (var. percentage of HOAc in water, 318 K);

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: 6973-73-5
4-chloro-1-(diacetoxyiodo)benzene

: 50-81-7
ascorbic acid

A: 637-87-6
1-Chloro-4-iodobenzene

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;

...Expand

: 16308-17-1
(3-chlorophenyl)iodanediyl diacetate

: 50-81-7
ascorbic acid

A: 625-99-0
3-iodochlorobenzene

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;

...Expand

: 19169-99-4
(4-nitrophenyl)-λ3-iodanediyl diacetate

: 50-81-7
ascorbic acid

A: 636-98-6
p-nitrobenzene iodide

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;

...Expand

: 19169-97-2
m-(diacetoxyiodo)toluene

: 50-81-7
ascorbic acid

A: 625-95-6
3-Iodotoluene

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;

...Expand

: 16308-16-0
1-(diacetoxyiodo)-4-methylbenzene

: 50-81-7
ascorbic acid

A: 624-31-7
4-tolyl iodide

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;

...Expand

: 16307-37-2
3-nitro(diacetoxyiodo)benzene

: 50-81-7
ascorbic acid

A: 645-00-1
m-iodonitrobenzene

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;

...Expand

: 16308-14-8
4-methoxy(diacetoxyiodo)benzene

: 50-81-7
ascorbic acid

A: 696-62-8
para-iodoanisole

B: 64-19-7
acetic acid

C: 490-83-5
L-dehydroascorbic acid

Conditions

Conditions	Yield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;

...Expand