299-36-5

Basic information

• Product Name: Ascorbic Acid
• Synonyms: (5R)-5-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-4-keto-furan-2-olate;(5R)-5-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-4-oxo-furan-2-olate;(5R)-5-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-4-oxofuran-2-olate
• CAS NO: 299-36-5
• Molecular Formula: C₆H₇O₆
• Molecular Weight: 176.12
• Mol File: 299-36-5.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 552.672°C at 760 mmHg
• Flash Point: 238.199°C
• Appearance: /
• Vapor Pressure: 0mmHg at 25°C
• CAS DataBase Reference: Ascorbic Acid(CAS DataBase Reference)
• NIST Chemistry Reference: Ascorbic Acid(299-36-5)
• EPA Substance Registry System: Ascorbic Acid(299-36-5)

Safety Data

• Hazardous Substances Data: 299-36-5(Hazardous Substances Data)

Usage

General Description

Ascorbic acid, also known as vitamin C, is a water-soluble vitamin and a powerful antioxidant commonly found in fruits and vegetables. It plays a crucial role in various biological processes, including collagen production, immune system function, and wound healing. Ascorbic acid also helps to protect the body's cells from damage caused by free radicals and environmental toxins. It is essential for the maintenance of healthy skin, bones, and teeth, and is widely recognized for its ability to prevent and treat scurvy, a disease caused by a deficiency of vitamin C. Additionally, ascorbic acid is commonly used as a food additive and dietary supplement to support overall health and well-being.

InChI:InChI=1/C6H8O6/c7-1-2(8)5-3(9)4(10)6(11)12-5/h2,5,7-10H,1H2/p-1/t2-,5+/m0/s1

Upstream product

• 50-81-7 vitamin C 
• 69884-58-8 trichloromethyl peroxyl 
• 17167-98-5 trifluoromethylperoxy radical 
• 108083-11-0 CBr₃O₂ 
• 50-81-7 ascorbic acid 
• 126-44-3 2-hydroxy-1,2,3-propanetricarboxylate 
• 55465-67-3 2-hydroxy-propane-1,2,3-tricarboxylic acid; bis-deprotonated form 
• 40055-99-0 glutathione thiyl radical 

Downstream Products

• 19393-66-9 2-hydroxy-2-propylhydroperoxide 
• 63983-50-6 ascorbic acid radical anion 
• 3071-34-9 benzyl hydroperoxide 
• 20614-54-4 (hydroperoxymethylene)dibenzene 
• 3031-73-0 methyl hydroperoxide 
• 16156-36-8 trifluoromethyl hydroperoxide 
• 94089-33-5 Trichlormethylhydroperoxid 
• 38878-40-9 promethazine cation 
• 63983-50-6 L-ascorbyl radical 
• 490-83-5 L-dehydroascorbic acid 
• 52993-47-2 (R)-2-((S)-4-Amino-4-carboxy-butyrylamino)-2-(carboxymethyl-carbamoyl)-ethanethiol anion 
• 127838-90-8 C₁₀H₁₆N₃O₈S^(1-) 
• 50-81-7 ascorbic acid radical anion 
• 144-62-7 oxalic acid 

Relevant articles and documents

Titanium(IV) and vitamin C: Aqueous complexes of a bioactive form of Ti(IV)

Ascorbic acid is among the biorelevant ligands that render Ti(IV) stable in aqueous solution. A series of pH-dependent titanium(IV) coordination complexes of l-ascorbic acid is described. Directed by spectropotentiometric methods, important aspects of the aqueous interactions in this system are investigated, including ligand binding mode, pH-dependent metal-ligand stoichiometry, and the importance of metal ion-promoted hydrolysis and the binding of hydroxide. Stability constants are determined for all metal ion-ligand-proton complexes by a process of model optimization and nonlinear least-squares fitting of the combined spectropotentiometric titration data to the log βMLH values in the model. A speciation diagram is generated from the set of stability constants described in the model. In the range pH 3-10, the aqueous speciation is characterized by the sequential appearance of the following complexes as a function of added base: Ti(asc)20 → Ti(asc) 32- → Ti(asc)2(OH)2 2- → Ti(asc)(OH)42-. These species dominate the speciation at pH 10, respectively, with minimum log stability constants (β values) of 25.70, 36.91, 16.43, and -6.91. Results from electrospray mass spectrometry, metal-ligand binding experiments, and kinetics measurements support the speciation, which is characterized by bidentate chelation of the ascorbate dianion to the titanium(IV) ion via proton displacement, and a pH-dependent metal-ligand binding motif of ligand addition followed by metal ion-promoted hydrolysis, stepwise ligand dissociation, and the concomitant binding of hydroxide ion. Additionally, the kinetics of ligand exchange of titanium ascorbate with citrate are reported to understand better the possible fate of titanium ascorbate under biologically relevant conditions.

Solvent Effects in the Reactions of Peroxyl Radicals with Organic Reductants. Evidence for Proton-Transfer-Mediated Electron Transfer

Absolute rate constants for the reaction of substituted methylperoxyl radicals with ascorbate, urate, trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid) and TMPD (N,N,N',N'-tetramethyl-p-phenylenediamine) have been determined by pulse radiolysis in different solvents.In water-alcohol or water-dioxane solutions, the rate constants for trihalomethylperoxyl radicals generally increase with increasing water content.The rate constant for the reaction of CCl3O2* radicals with trolox was measured in water, MeOH, i-PrOH, t-BuOH, ethylene glycol, diethyl ether, dioxane, acetone, acetonitrile, formamide, dimethylformamide, pyridie, and CCl4.The rate constants were found to correlate well with a two-parameter equation that includes the dielectric constant of the solvent and the coordinate covalency parameter, a measure of the proton-transfer basicity of the solvent.Kinetic isotope effects in H2O/D2O of about 2 and the activation entropies of about -10 eu for reduction of RO2* by the organic reductants indicate that electron transfer to the peroxyl radical is concerted with the transfer of proton from the solvent to the incipient hydroperoxide anion.

NUCLEOPHILIC REACTIONS OF THE OXYGEN RADICAL ANION IN AN APROTIC MEDIUM

-