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      產品中心

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      L-氨基酸 >> L-胱氨酸

       

      L-氨基酸 >> L-胱氨酸

       產品:L-胱氨酸

       
      Product: L-Cystine base
       
      Cas No.:56-89-3

       

      Item

      Limited

      (Enterprise Standard)

      Appearance

      White crystalline powder or crystals

      Specific  Rotation

      -215~-225

      State Of Solution

      92%

      Chloride

      0.06%

      Sulfate

      0.02%

      Iron

      10ppm

      Heavy Metals

      10ppm

      Arsenic

      1.0ppm

      Other Amino Acids

      Chromatographically

      Not Detectable

      Loss On Drying

      0.20%

      Residue On Ignition

      0.10%

      Assay

      98.5~101.0%

      Ph

      5.0~6.5

       

       Item

      Limit (EP5)

      Characters

      A white, crystalline powder, practically insoluble in water and in alcohol. It dissolves in dilute solutions of alkali hydroxides

      Identification

      conforms

      Specific optical rotation

      -218 to -224

      Ninhydrin-positive substances

      Meets the requirements

      Chloride

      ≤200ppm

      Sulphate

      ≤300ppm

      Ammonium

      ≤200ppm

      Iron

      ≤10ppm

      Heavy metals(as Pb)

      ≤10ppm

      Loss on drying

      ≤0.50%

      Sulphated ash

      ≤0.1%

      Assay

      98.5% ~ 101.0%

       

      Item

      Aji92

      Appearance

      White Crystals Or Crystalline Powder

      SPECIFIC  ROTATION[Α]D20

      -215° To -225°

      State Of Solution

      ≥98%

      Chloride

      ≤0. 02%

      Sulfate

      ≤0. 02%

      Iron

      10ppm

      Heavy Metals

      ≤10ppm

      Arsenic

      ≤1.0ppm

      Other Amino Acids

      Chromatographically

      Not Detectable

      Loss On Drying

      ≤0.2%

      Residue On Ignition

      ≤0.10%

      Assay

      98.5~101.5%

      Ph

      5.0~6.5

       

       

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