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L-METHIONINE For Biochemistry

(S)-2-Amino-4-(methylmercapto)butyric acid; L-2-Amino-4-(methylthio)butanoic acid

COAs

Packings

25 g (00025)

100 g (00100)

500 g (00500)

1PW1200060 1PW1200100 1PW1200750
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Article No. 04605 Grade For Biochemistry
Purity 99% CAS No. 63-68-3
Molecular Formula C5H11NO2S Molecular Weight 149.21
H.S. Code 2930.4000 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

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%
Revision Date: 29-Apr-2013

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