L-MethionineCAS: 63-68-3
MW: 149.21
An essential amino acid.

L-Methionine (CAS 63-68-3)

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Synonym: L-MET; L-Lobamine; H-Met-OH
Application: An essential amino acid
CAS Number: 63-68-3
Molecular Weight: 149.21
Molecular Formula: C5H11NO2S
* Refer to Certificate of Analysis for lot specific data (including water content).
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L-Methionine is the L-isomer of methionine, an essential amino acid for human development. Methionine is important in many functions, including acting as a hepatoprotectant, an acetominophen poisoning antidote, and a urinary acidifier. It is also a chelating agent for heavy metals.

Physical State :
Solubility :
Soluble in 1M HCl (50 mg/ml), and water (56.6 mg/ml at 25° C). Insoluble in ethanol, acetone, and ether.
Storage :
Store at room temperature
Melting Point :
284° C (lit.)(dec.)
Boiling Point :
~306.9° C at 760 mmHg (Predicted)
Density :
~1.2 g/cm3
Refractive Index :
n20D 1.53 (Predicted)
Optical Activity :
α25D 23°±1.1°, c = 2 in 6N HCl; α20D 24.2°±0.5°, c = 8 in HCl(1+1))(after drying); α20D 23°, c = 2 in 2N HCl; α20D 23.7°±0.5°, c = 5 in 5 M HCl
IC50 :
Copper-free calcein 1: EC5050 = 0.8 mM (bovine serum albumin)
Ki Data :
S-ribosylhomocysteine lyase: Ki= 61 µM (Bacillus subtilis ); γ-glutamyltranspeptidase 1: Ki= 26.9 mM (rat); Fatty Acid Synthase: Ki>150 mM (human)
pK Values :
pKa: 2.23 (Predicted), 2.28, pKb: 9.4 (Predicted)
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
WGK Germany :
PubChem CID :
Merck Index :
14: 5975
MDL Number :
EC Number :
Beilstein Registry :
CSCC[[email protected]@H](C(=O)O)N

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Certificate of Analysis

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