Description
L-Cystine is an amino-acid reagent for biochemistry supplied at a minimum purity of 98,5 %. Its empirical formula is C₆H₁₂N₂O₄S₂, with a molar mass of 240,30 g/mol and a density of 1,68 g/cm³. The compound is identified by CAS number 56-89-3 and EG number 200-296-3, enabling unambiguous selection for research and analytical preparation work. This grade is intended for biochemistry applications where a defined cystine quality is required in buffer, media, or method-development contexts. The material is Physical constants such as molar mass and density support calculation of solutions and documentation of experimental procedures. L-Cystine from manufacturer Carl ROTH is offered as a discrete biochemical building block rather than a formulated kit component. Laboratories can incorporate into amino-acid inventories used across protein chemistry, metabolic studies, and related life-science workflows that specify L-cystine at this purity level.
This article is part of Amino acids & peptides, in Organic chemicals & synthesis reagents.
Key features
- Appearance: white, cryst. powder
- Assay: ≥98.5 %
- pH-value: 5.0-6.5
- Specific rotation [α]20D: -225° to -215°
- Chloride (Cl): ≤0.05 %
- Sulphate (SO4): ≤0.02 %
- Arsenic (As2O3): ≤0.0001 %
- Iron (Fe): ≤0.002 %
- Heavy metals (as Pb): ≤0.001 %
- Loss on drying: ≤0.2 %
- CAS number: 56-89-3
- Pack sizes: 100 g, 500 g
- EG nr.: 200-296-3
- Purity: min. 98,5 %
- Empirical formula: C₆H₁₂N₂O₄S₂
- Molar mass: 240,30 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about L-Cystine, min. 98,5 %, for biochemistry, 100 g, plastic
What is this article?
L-Cystine, min. 98,5 %, for biochemistry, 100 g, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Amino acids & peptides, inside Organic chemicals & synthesis reagents, in Lab chemicals.
An amino acid or a peptide is specified by the sequence or the residue, the chirality, and for a peptide the purity and the salt form. L and D forms are different compounds. A trifluoroacetate salt and a hydrochloride salt weigh differently per mole of peptide.
An organic chemical is built on carbon. In this category it is a building block or a reagent for making another molecule: a starting material, a coupling agent, a polymer, a PEG. Purity is a specification of which impurities remain. The structure, the CAS number and the grade decide whether two bottles are the same substance. Structures and properties are on PubChem. Nomenclature is IUPAC. Classification follows ECHA and the CLP Regulation.
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The category is Organic chemicals & synthesis reagents. The sub-category is Amino acids & peptides. The catalogue is Lab chemicals.
Shelves beside this one are Organic building blocks & synthesis reagents, Polymers, PEGs & silicones and Click chemistry, bioconjugation & synthesis reagents.
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