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CAS No 490-83-5 , L-threo-2,3-Hexodiulosonicacid, g-lactone

  • Name: L-threo-2,3-Hexodiulosonicacid, g-lactone
  • Synonyms: Dehydro-L-ascorbic acid; L-Ascorbic acid, oxidized;Dehydroascorbicacid, L- (8CI); DHAA; L-Ascorbicacid, dehydro-;L-threo-Dehydroascorbic acid; Oxidized vitamin C; L-Dehydroascorbic acid; Dehydroascorbic acid;L-threo-2,3-Hexodiulosonicacid, g-lactone; Oxidized ascorbic acid;
  • CAS Registry Number:
  • Melting Point: 228 °C (dec.)(lit.)
  • Flash Point: 170°C
  • Boiling Point: 389.3°Cat760mmHg
  • Density: 1.743g/cm3
  • Refractive index: 1.569
  • Safety Statements:
    WGK Germany 3
    1-8-10
  • Flash Point: 170°C
  • EINECS: 207-720-6
  • Molecular Weight: 174.11
  • InChI: InChI=1/C6H6O6/c7-1-2(8)5-3(9)4(10)6(11)12-5/h2,5,7-8H,1H2/t2-,5+/m0/s1
  • Molecular Formula: C6H6 O6
  • Molecular Structure:CAS No:490-83-5 L-threo-2,3-Hexodiulosonicacid, g-lactone
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490-83-5 Dehydroascorbic acid

  • Dehydroascorbic acid
  • United States INDOFINE Chemical Co., Inc. [Manufacturer]
  • Tel: (908) 359-6778
  • Fax: (908) 359-1179
  • Address: 121 Stryker Lane
    Bldg 30, Suite 1
    Hillsborough, NJ 08844 ,United States
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490-83-5 L-threo-2,3-Hexodiulosonicacid, g-lactone

  • China Shanghai Hanhong Chemical Co., Ltd. [, Manufacturer, Trading Company, Agent]
  • Tel: +86-(21)-64762736, 64531573
  • Fax: +86-(21)-54291107
  • Address: 206-209, NO.1 Building , NO.245,Jiachuan Road, Xuhui District, Shanghai, Xuhui District,ShanghaiChina
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490-83-5 DEHYDROASCORBIC ACID(RG)

  • DEHYDROASCORBIC ACID(RG)Hehydroascorbic acid
  • United States ChromaDex Inc. [Manufacturer]
  • Tel: 949-419-0288
  • Fax: 949-419-0294
  • Address: ChromaDex Inc.
    10005 Muirlands Blvd. Suite G - First Floor
    Irvine, CA 92618 ,United States
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490-83-5 Dehydroascorbic acid

  • Dehydroascorbic acidOxidized vitamin C; Dehydro-L-ascorbic acid; L-Ascorbic acid oxidized
  • Switzerland Biosynth AG [Manufacturer]
  • Tel: +41 71 858 20 20/ 630.305.8400 (USA)
  • Fax: +41 71 858 20 30
  • Address: BIOSYNTH AG
    Rietlistrasse 4
    9422 Staad / Switzerland
    Phone: +41 (0)71 858 20 20
    Fax: +41 (0)71 858 20 30 ,Switzerland
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490-83-5 Bis-Dehydro-L-ascorbic acid

  • China Shanghai Xunxin Chemical Co., Ltd [Manufacturers]
  • Tel: +86-(21)-38218795
  • Fax: +86-(21)-38218795
  • Address: 580 Lane, Kanghong Road, Pudong New District, Shanghai 201315, Shanghai,ShanghaiChina
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490-83-5 Bis-Dehydro-L-ascorbic acid

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490-83-5 Dehydroascorbic acid

  • Dehydroascorbic acid
  • China Beijing HuameiHuli Biochem Ltd [Manufacturers]
  • Tel: 010-86181995
  • Fax: 010-86860610
  • Address: Beijing TongZhou District Beijing,BeijingChina
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490-83-5 Dehydroascorbic acid

  • Dehydroascorbic acid
  • Germany ABCR GmbH & Co KG [Manufacturer]
  • Tel: +49 721 95061-0
  • Fax: +49 721 95061-80
  • Address: Im Schlehert 10
    76187 Karlsruhe
    Germany ,Germany
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490-83-5 1-Dehydroascorbic acid

  • 1-Dehydroascorbic acid
  • Germany CHEMOS GmbH [Manufacturer]
  • Tel: 0049 9402/9336 0
  • Fax: 0049 9402/9336 13
  • Address: CHEMOS GmbH
    Werner-von-Siemensstr. 3
    93128 Regenstauf
    Germany ,Germany
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490-83-5 DEHYDROASCORBIC ACID

  • DEHYDROASCORBIC ACID
  • Hong kong Advanced Technology & Industrial Co., Ltd. [Manufacturer]
  • Tel: (852) 2390 2293/ (852) 2394 5546
  • Fax: (852) 2789 8314
  • Address: Unit B, 1/F., Cheong Shing Bldg.,
    17 Walnut St., Tai Kok Tsui, Kln,
    Hong Kong ,Hong kong
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References of L-threo-2,3-Hexodiulosonicacid, g-lactone
Title: Dehydroascorbic Acid
CAS Registry Number: 490-83-5
CAS Name: L-threo-2,3-Hexodiulosonic acid g-lactone
Molecular Formula: C6H6O6
Molecular Weight: 174.11
Percent Composition: C 41.39%, H 3.47%, O 55.14%
Literature References: The reversibly oxidized form of ascorbic acid. Prepd by the action of benzoquinone on ascorbic acid: Ohle, Erlbach, Ber. 67, 555 (1934); Moll, Wieters, E. Merck's Jahresber. 50, 65 (1936); by the action of iodine: Herbert et al., J. Chem. Soc. 1933, 1270; Kenyon, Munro, ibid. 1948, 158; by oxidn with peri-naphthindan-2,3,4-trione hydrate: Moubasher, J. Biol. Chem. 176, 533 (1948); see also Müller-Mulot, Z. Physiol. Chem. 351, 52 (1970). Isomerization and formn of derivs: Egge, Tetrahedron Lett. 1969, 801. Structure studies: Teichmann, Ziebarth, Z. Prakt. Chem. 33, 124 (1966). Toxicity studies: Gaudiano et al., Boll. Soc. Ital. Biol. Sper. 43, 674 (1967).
Properties: Fine needles, dec 225°. Sol in water at 60°. In soln the two carbonyl groups (in position 2 and 3) assume the hydrated form -C(OH)2-C(OH)2-. Practically neutral reaction. pKa: 3.90. [a]D20 +56°. Aq solns are much less stable than those of ascorbic acid. Detailed stability data: Bogdanski, Bogdanska, Bull. Acad. Pol. Sci. Cl. 2 3, 41 (1955). See also Velisek et al., Collect. Czech. Chem. Commun. 37, 1465 (1972). Undecomposed dehydroascorbic acid in soln is easily converted to ascorbic acid by reduction with sulfurous acid. Has same antiscorbutic activity in humans as ascorbic acid (upon oral ingestion).
pKa: pKa: 3.90
Optical Rotation: [a]D20 +56°