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United Kingdom
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L-Methionine ≥99%, Millipore®
 :  Merck
 
L-Methionine ≥99%, Millipore®
 :  Merck

 

  • Assay (HClO4-titration):
    99% min
  • Ammonium (NH4):
    0.01% max
  • Appearance:
    Passes test
  • Appearance of solution (0.5mol/L, HCl 1mol/L):
    Passes test
  • Arsenic (As):
    0.0005% max
  • Calcium (Ca):
    0.001% max
  • Chloride (Cl):
    0.02% max
  • Cobalt (Co):
    0.0005% max
  • Foreign amino acids:
    0.3% max
  • Heavy metals (as Pb):
    0.001% max
  • Identity (IR-spectrum):
    Passes test
  • Iron (Fe):
    0.0005% max
  • Loss on drying [105°, 3 hr):
    0..3% max
  • Magnesium (Mg):
    0.0005% max
  • Other ninhydrine positive substances (as glycine):
    0.1% max
  • Potassium (K):
    0.0005% max
  • Sodium (Na):
    0.005% max
  • Specific rotation ([a]20/D, 5%, in 1N HCl):
    +22.5-+23.5°
  • Sulfate (SO4):
    0.01% max
  • UV Absorption (260nm, 0.5mol/L, 1cm, HCl 1mol/L):
    0.5 max
  • UV Absorption (280nm, 0.5mol/L, 1cm, HCl 1mol/L):
    0.2 max
  • Zinc (Zn):
    0.0005% max

 

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