1.05707
L-Methionine
for biochemistry
Synonym(s):
L-Methionine, Met
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About This Item
CAS Number:
Molecular Weight:
149.2
MDL number:
UNSPSC Code:
12352209
EC Index Number:
200-562-9
NACRES:
NA.21
Quality Level
form
solid
potency
36000 mg/kg LD50, oral (Rat)
pH
5-7 (20 °C, 10 g/L in H2O)
mp
280-282 °C
solubility
48 g/L
density
1.34 g/cm3
bulk density
550 kg/m3
storage temp.
2-30°C
InChI
1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)
InChI key
FFEARJCKVFRZRR-UHFFFAOYSA-N
Related Categories
General description
for biochemistry
Application
L-Methionine for biochemistry. CAS 63-68-3, pH 5 - 7 (10 g/l, H₂O, 20 °C).
Analysis Note
Assay (perchloric acid titration, calculated on dried substance)≥ 99.0 %Identity (IR-spectrum)passes testAppearancewhite or almost white, crystalline powder or colorless crystalsAppearance of solution (0.5 mol/l, hydrochloric acid 1 mol/l)clear and colorlessSpec. rotation (α 20/D, 50 g/l, hydrochloric acid 1 mol/l, calc. on dried substance)+22.5 to +23.5UV-Absorption (260 nm, 0.5 mol/l, 1 cm, hydrochloric acid 1 mol/l)≤ 0.50UV-Absorption (280 nm, 0.5 mol/l, 1 cm, hydrochloric acid 1 mol/l)≤ 0.20Chloride (Cl)≤ 0.02 %Sulfate (SO₄)≤ 0.01 %Heavy metals (as Pb)≤ 0.001 %As (Arsenic)≤ 0.0005 %Ca (Calcium)≤ 0.001 %Co (Cobalt)≤ 0.0005 %Fe (Iron)≤ 0.0005 %K (Potassium)≤ 0.0005 %Mg (Magnesium)≤ 0.0005 %Na (Sodium)≤ 0.005 %NH₄ (Ammonium)≤ 0.01 %Zn (Zinc)≤ 0.0005 %Foreign amino acids≤ 0.3 %Other ninhydrine positive substances≤ 0.1 %Loss on drying (105 °C; 3 h)≤ 0.3 %
WGK
WGK 1
Certificates of Analysis (COA)
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