L-METHIONINE (FOR BIOCHEMISTRY)

Article No.	Grade	Purity	Cas no.	Molecular Formula	Molecular Weight	H.S. Code	Shelf Life
M0135200100	For Biochemistry	99%	63-68-3	C₅H₁₁NO₂S	149.21	2930.4000	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

Flash Point [°C]

284°C

Decomposition point [°C]

276°C

Solubility in water [% weight]

56.6 g/L @ 25°C

Appearance:	White powder
Chloride (Cl):	Max 0.02%
Sulphate (SO4):	Max 0.03%
Heavy metal (as Pb):	Max 0.001%
Loss on drying (at 105°C) :	Max 0.3%
Iron (Fe):	Max 0.001%
Ammonium (NH4):	Max 0.01%
Assay (by HClO4 titration):	Min 99%
Foreign amino acids:	Max 0.3%
Residue on ignition (as SO4):	Max 0.1%
Other ninhydrin positive substances (as glycine):	Max 0.1%
pH (2.5% solution):	5.5 - 6.5
Specific optical rotation ([α]20/D):	+22.5 to + 24 deg