Description
L-Cysteine is a sulphur-containing amino acid supplied at a minimum purity of 99 % under the CELLPURE® grade for demanding cell-culture and biochemical work. With CAS number 52-90-4, empirical formula C₃H₇NO₂S and a molar mass of 121,16 g/mol, it offers a well-defined identity for media formulation, protein chemistry and metabolic studies. The material has a density of 1,496 g/cm³ and is identified by EG nr. 200-158-2. L-Cysteine from manufacturer Carl ROTH is positioned for applications in amino-acid supplementation, redox-related pathways and cell-culture media development where consistent purity and clear analytical data are essential. Researchers can rely on the stated assay and physical constants when documenting protocols or scaling small-batch media. The CELLPURE® designation underscores suitability for sensitive biological systems that require high-quality amino-acid building blocks.
This article is part of Click chemistry, bioconjugation & synthesis reagents, in Biochemicals & reagents.
Key features
- Endotoxins: ≤24 E.U./g
- Assay: ≥99 %
- Loss on drying: ≤0.5 %
- Specific rotation [α]20D: +8.3° to +9.5°
- Ammonium (NH4): ≤0.02 %
- Chloride (Cl): ≤0.04 %
- Sulphate (SO4): ≤0.028 %
- Heavy metals (as Pb): ≤0.001 %
- Arsenic (As2O3): ≤0.0001 %
- Iron (Fe): ≤0.001 %
- CAS number: 52-90-4
- Pack sizes: 25 g, 100 g, 500 g
- EG nr.: 200-158-2
- Purity: min. 99 %
- Molar mass: 121,16 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
Warning
Hazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about L-Cysteine, min. 99 %, CELLPURE®, 25 g, plastic
What is this article?
L-Cysteine, min. 99 %, CELLPURE®, 25 g, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Click chemistry, bioconjugation & synthesis reagents, inside Biochemicals & reagents, in Life Science & Microbiology.
Click and bioconjugation reagents join two molecules under mild conditions, often an azide to an alkyne, or an NHS ester to an amine. The linker length and the reactive group are the specification. They are small bottles of a reactive compound, and moisture often ruins them.
A biochemical is a molecule of life, sold as a reagent: an amino acid, a sugar, a nucleotide, a lipid, an enzyme, an antibiotic. The difference from a bulk chemical is that the use is a biological one, and the impurities that matter are the ones that change that use. An enzyme is specified by activity, not only by mass. An antibiotic is specified by potency. Papers are on PubMed. Structures are on PubChem. Strains and lines that consume these reagents are at ATCC.
Which category should I open next?
The category is Biochemicals & reagents. The sub-category is Click chemistry, bioconjugation & synthesis reagents. The catalogue is Life Science & Microbiology.
Shelves beside this one are Amino acids & peptides, Carbohydrates & sugars, Coenzymes, nucleotides & vitamins, Biochemicals (other), Enzymes & substrates, Antibiotics & antimycotics, Lipids, steroids & fatty acids and Detergents & surfactants.
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