L-Methionine Cas:63-68-3

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L-Methionyl b-naphthylamide
Methionine b-naphthylamide

molecular formula: C5H11NO2S
Molecular weight: 149.21100
Physical Properties:
Density: 1.2±0.1 g/cm3
Boiling Point: 306.9±37.0 °C at 760 mmHg
Melting Point: 284 °C (dec.)(lit.)
Molecular Formula: C5H11NO2S
Molecular Weight: 149.211
Flash Point: 139.4±26.5 °C
Exact Mass: 149.051056
PSA: 88.62000
LogP: 0.37
Vapour Pressure: 0.0±1.4 mmHg at 25°C
Index of Refraction: 1.531
Water Solubility: Soluble
Appearance: White crystalline powder
Identification: IR
Assay : 99.0~101.0%
Specific rotation: +22.4°~+24.8°
pH : 5.6~6.1
Residue on ignition: ≤0.40%
Chloride (Cl): ≤0.05%
Loss on drying: ≤0.30%
Sulfate(SO4): ≤0.03%
Iron(Fe) : ≤30ppm
Heavy metals (Pb) : ≤15ppm
Organic volatile impurities: Meets the requirements
Used as nutritional supplements and feed additives.
Package and Storage:
25kg/drum, store at room temperature away from light.

Item Specifications Results
Appearance White crystalline powder White crystalline powder
Assay 99.0101.0% 99.9%
Specific rotation +22.4°+24.8° +23.7°
pH 5.66.1 5.9
Residue on ignition ≤0.40% 0.13%
Chloride (CL) ≤0.05% 0.018%
Loss on drying ≤0.30% 0.25%
Sulfate(SO4) ≤0.03% 0.015%
Iron,(Fe) ≤30ppm 7ppm
Heavy metals ,(Pb) ≤15ppm 6ppm
Organic volatile impurities Meets the requirements Conform
Identification Infrared absorption Conform

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