L-METHIONINE For Biochemistry

L-METHIONINE For Biochemistry

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Category: Amino Acids & Derivatives

Description
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Description

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

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

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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%

Packings

25 g	00025
100 g	00100
500 g	00500

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