Description
L-Cystine is the oxidised disulfide form of cysteine, supplied at a minimum purity of 98,5 % under the CELLPURE® grade for biochemical and cell-culture use. Identified by CAS number 56-89-3, empirical formula C₆H₁₂N₂O₄S₂ and a molar mass of 240,30 g/mol, it provides a defined sulphur-containing amino-acid building block. Density is given as 1,68 g/cm³, and the substance carries EG nr. 200-296-3. offers a practical quantity for media preparation, peptide-related work and studies of disulfide chemistry. L-Cystine from manufacturer Carl ROTH is suited to amino-acid supplementation, redox and disulfide research, and formulation of specialised culture media. Laboratories benefit from the stated assay and physical constants when specifying reagents for reproducible protocols. As the dimeric counterpart of cysteine, it complements free-thiol reagents in workflows that require controlled sulphur amino-acid input. CELLPURE® quality supports applications where consistent biochemical performance is important.
This article is part of Click chemistry, bioconjugation & synthesis reagents, in Biochemicals & reagents.
Key features
- Endotoxins: ≤0.5 E.U./mg
- Assay: ≥98.5 %
- Loss on drying: ≤0.2 %
- Specific rotation [α]20D: -225° to -215°
- Chloride (Cl): ≤0.05 %
- Sulphate (SO4): ≤0.02 %
- Heavy metals (as Pb): ≤0.001 %
- Arsenic (As2O3): ≤0.0001 %
- Iron (Fe): ≤0.002 %
- CAS number: 56-89-3
- Pack sizes: 25 g, 100 g, 500 g
- EG nr.: 200-296-3
- Purity: min. 98,5 %
- Molar mass: 240,30 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Click chemistry, bioconjugation & synthesis reagents
Catalogue
Brand
Questions about L-Cystine, min. 98,5 %, CELLPURE®, 25 g, plastic
What is this article?
L-Cystine, min. 98,5 %, 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.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.