Description
L-Methionine is an essential sulfur-containing amino acid offered at a minimum purity of 99 % in the CELLPURE® grade for cell-culture and biochemical work. It is defined by CAS number 63-68-3, empirical formula C₅H₁₁NO₂S and a molar mass of 149,21 g/mol, supporting accurate media preparation and metabolic studies. L-Methionine serves as a proteinogenic building block and as a methyl-group donor in numerous enzymatic pathways, making it relevant for custom media, feed formulations and analytical standards. This CELLPURE® quality from manufacturer Carl ROTH is oriented toward applications where consistent amino-acid identity matters for reproducible cell growth and experimental design. Laboratories in life sciences and biopharmaceutical development can integrate the reagent into controlled culture systems and biochemical assays with confidence in its stated assay and chemical definition.
This article is part of Microscopy stains & staining solutions, in Dyes, stains & indicators.
Key features
- Endotoxins: ≤6.0 E.U./g
- Assay: ≥99 %
- Loss on drying: ≤0.2 %
- Specific rotation [α]20D: +23.0° to +24.0°
- Ammonium (NH4): ≤0.02 %
- Chloride (Cl): ≤0.02 %
- Sulphate (SO4): ≤0.02 %
- Heavy metals (as Pb): ≤0.001 %
- Arsenic (As2O3): ≤0.0001 %
- Iron (Fe): ≤0.001 %
- CAS number: 63-68-3
- Pack sizes: 25 g, 100 g, 500 g
- EG nr.: 200-562-9
- Purity: min. 99 %
- Empirical formula: C₅H₁₁NO₂S
- Molar mass: 149,21 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about L-Methionine, min. 99 %, CELLPURE®, 25 g, plastic
What is this article?
L-Methionine, min. 99 %, CELLPURE®, 25 g, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Microscopy stains & staining solutions, inside Dyes, stains & indicators, in Lab chemicals.
A microscopy stain binds a structure so it can be seen: haematoxylin on nuclei, eosin on cytoplasm, Gram reagents on a bacterial wall. A ready solution and a dry dye to be dissolved are different articles. The method names the stain. A substitute dye is a different method.
A dye or a stain binds, or changes colour, so that something invisible becomes visible. An indicator changes at a pH or a redox point. A fluorescent dye absorbs one wavelength and emits another, which is how a microscope or a plate reader picks it out. The excitation and emission, or the transition interval, are the specification. The colour name on the label is not. Structures are on PubChem under IUPAC names. Methods are in the PubMed literature.
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