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1.05707

L-Methionine

for biochemistry

Synonym(s):

L-Methionine, Met

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About This Item

CAS Number:
63-68-3
Molecular Weight:
149.2
UNSPSC Code:
12352209
EC Index Number:
200-562-9
NACRES:
NA.21
MDL number:
MFCD00063097
eCl@ss:
32160406
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Quality Segment

100

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

SMILES string

S(CCC(N)C(=O)[O-])C.[H+]

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

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 %

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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