COA Center



DL-METHIONINE For Biochemistry

(Confirms to BP)
(±)-2-Amino-4-(methylmercapto)butyric acid; DL-2-Amino-4-(methylthio)butanoic acid


100 g (00100)

500 g (00500)

1000 g (01000)

1PW1200200 1PW1200750 1PW1201600
Article No. 04606 Grade For Biochemistry
Purity 99% CAS No. 59-51-8
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 granular
Melting point/ Freezing point [°C] 280 °C Boiling point [°C] 186 °C
Density [g/cm3] 1.34 Solubility in water [% weight] Soluble in water


Appearance White to almost white, crystalline powder or small flakes, melt at 270°C Assay (Potentiometric; on anhydrous basis) 99.0-101.0%
Solubility Sparingly soluble in water, very slightly soluble in alcohol. It dissolves in dilute acids and in dilute solutions of the alkali hydroxides Identifications To comply BP test
Appearance of solution To comply BP test Loss on drying (at 105°C; 3 hrs) Max 0.5%
pH (2% solution in water) 5.4 to 6.1 Chlorides Max 0.02%
Sulphates Max 0.02% Heavy metal (as Pb) Max 0.002%
Sulphated ash Max 0.1% Related Substances ( by TLC) To comply BP test
Revision Date: 18-Mar-2017

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