L-Methionine 99% For Biochemistry
(S)-2-Amino-4-(methylmercapto)butyric acid; L-2-Amino-4-(methylthio)butanoic acid
Product Code. |
01698 |
Grade |
|
Purity |
98% |
CAS No. |
63-68-3 |
Molecular Formula |
C5H11NO2S |
Molecular Weight |
149.21 |
H.S.Code |
2930.40000 |
Shelf Life |
60 Months |
Physical Properties
| Physical state at 20 °C |
Solid |
Colour |
White powder |
Odour |
Slight odour |
| pH value |
5.6 - 6.1 |
Melting point/ Freezing point [°C] |
284°C |
Decomposition point [°C] |
276°C |
| Flash point [°C] |
284°C |
Solubility in water [% weight] |
56.6 g/L @ 25°C |
Packaging
Specification
| Appearance | White powder |
| Assay (by HClO4 titration) | Min 99% |
| Specific optical rotation ([?]20/D) | +22.5 to + 24 deg |
| pH (2.5% solution) | 5.5 - 6.5 |
| Loss on drying (at 105°C) | Max 0.3% |
| Residue on ignition (as SO4) | Max 0.1% |
| Chloride (Cl) | Max 0.02% |
| Sulphate (SO4) | Max 0.03% |
| Iron (Fe) | Max 0.001% |
| Heavy metal (as Pb) | Max 0.001% |
| Ammonium (NH4) | Max 0.01% |
| Foreign amino acids | Max 0.3% |
| Other ninhydrin positive substances (as glycine) | Max 0.1% |
Safety Information and Hazard Symbols