• Shanghai Minstar Chemical Co., Limited

    Products > API & intermediates > > Doxycycline hydrochloride
    Product name : Doxycycline hydrochloride
    CAS : 10592-13-9
    Molecular Formula : C22H25ClN2O8
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    Details:
    VIBRAMYCIN, HCL;,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-,monohydrochloride;biocamycin;doxigalumicina;doxy-ii;doxy-tablinen;ecodox;hydramycin

    Appearance: Yellow crystalline powder

    Solubility: Free soluble in water and in methanol,sparing soluble in 

      ethanol. It dissolves in solutions of alkali hydroxide and carbonates.

    Identification: A) tR of HPLC test 

                B) Sulphuric acid yellow Color reaction

                C) Chloride's reaction

    pH: 2.0 to 3.0

    Specific Optical Rotation: -105° to -120°,calculated on the

                         anhydrous,ethanol-free substance.

    Specific Absorbance: 300-355 at 349nm,calculated on the anhydrous,

                      ethanol-free substance.

    Light-absorbing Impurities: Not more than 0.07 at 490nm,calculated on 

                           the anhydrous,ethanol-free substance.

    Related Substances:

      Metacycline: Not more than 2.0%

      6-epidoxycycline: Not more than 2.0%

      Any individual impurities: Not more than 0.5%

      Disregard limit: Not more than 0.1%

    Ethanol: 4.3 to 6.0%

    Heavy metals: Less than 50ppm

    Water: 1.4% to 2.8%

    Sulphated ash: Not more than 0.4%

    Assay: 98.0-102.0% of C22H25ClN2O8,calculated on the

          anhydrous, ethanol-free substance.



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