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CAS No.: | 490-83-5 | ||||
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Name: | DEHYDROASCORBIC ACID | ||||
Article Data: | 58 | ||||
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.) |
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Boiling Point: | 389.3°Cat760mmHg | ||||
Flash Point: | 170°C | ||||
Hazard Symbols: | Xn | ||||
Risk Codes: | 22 | ||||
Safety: |
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PSA: | 100.90000 | ||||
LogP: | -2.59680 |
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; |
2,3-Dimethoxy-5-methyl-1,4-benzoquinone
ascorbic acid
A
2,3-dimethoxy-5-methylbenzene-1,4-diol
B
L-dehydroascorbic acid
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.); |
[bis(acetoxy)iodo]benzene
ascorbic acid
A
iodobenzene
B
acetic acid
C
L-dehydroascorbic acid
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); |
4-chloro-1-(diacetoxyiodo)benzene
ascorbic acid
A
1-Chloro-4-iodobenzene
B
acetic acid
C
L-dehydroascorbic acid
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; |
(3-chlorophenyl)iodanediyl diacetate
ascorbic acid
A
3-iodochlorobenzene
B
acetic acid
C
L-dehydroascorbic acid
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; |
(4-nitrophenyl)-λ3-iodanediyl diacetate
ascorbic acid
A
p-nitrobenzene iodide
B
acetic acid
C
L-dehydroascorbic acid
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; |
m-(diacetoxyiodo)toluene
ascorbic acid
A
3-Iodotoluene
B
acetic acid
C
L-dehydroascorbic acid
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; |
1-(diacetoxyiodo)-4-methylbenzene
ascorbic acid
A
4-tolyl iodide
B
acetic acid
C
L-dehydroascorbic acid
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; |
3-nitro(diacetoxyiodo)benzene
ascorbic acid
A
m-iodonitrobenzene
B
acetic acid
C
L-dehydroascorbic acid
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; |
4-methoxy(diacetoxyiodo)benzene
ascorbic acid
A
para-iodoanisole
B
acetic acid
C
L-dehydroascorbic acid
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; |