DL-Methionine 99+%

Supplier: Thermo Scientific

Synonyms: 2-Amino-4-(methylthio)butanoic acid, (±)-2-Amino-4-(methylthio)butyric acid, Methioninum racemicum, Methionine racematic, H-DL-Met-OH, (±)-Methionine, (±)-2-Amino-4-(methylthio)butanoic acid

125650025 125651000 125652500 125650010
ACRO125650025EA 43.3 GBP
ACRO125650025 ACRO125651000 ACRO125652500 ACRO125650010
DL-Methionine 99+%
DL-Methionine
Formula: C₅H₁₁NO₂S
MW: 149,21 g/mol
Melting Pt: 270…273 °C (dec.)
Density: 1,34 g/cm³
Storage Temperature: Refrigerator
MDL Number: MFCD00063096
CAS Number: 59-51-8
EINECS: 200-432-1
Merck Index: 13,06004

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Specification Test Results

Appearance White Crystalline powder or crystals
Infrared spectrum Conforms
Loss on drying ≤0.5 % (1 g, 105°C)
Sulfated ash ≤0.1 %
UV transmittance ≥95 % (c=10, 2 N HCl, 430 nm) 1 cm cell
pH 5.4 to 6.1 (2 % w/v in water)
Titration with HClO4 99.0 to 101.0 % (on dried substance)
Chloride (Cl) ≤200 ppm
Sulfate (SO4) ≤200 ppm
Ammonium (NH4) ≤1000 ppm
Heavy metals (as Pb) ≤10 ppm
Other amino acids ≤0.2 % (TLC)

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