L-METHIONINE
L-METHIONINE For Biochemistry
Short Name: L-METHIONINE
Synonym: (S)-2-Amino-4-(methylmercapto)butyric acid; L-2-Amino-4-(methylthio)butanoic acid
Basic Details
Article No.
LG2996
Grade
For Biochemistry
Purity
99%
CAS No.
63-68-3
HS Code
2930.4000
Shelf Life
60 Months
Packings Avialable
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
Chemical Specifications
Appearance
White powder
Assay (by HClO4 titration)
Min 99%
Specific optical rotation ([α]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 & Hazard Symbols