L-Cystine
L-Cystine (CAS: 56-89-3), a disulfide dimer of the amino acid L-cysteine, presents as a white crystalline powder. Its chemical formula is [-SCH2CH(NH2)CO2H]2 and it has a molecular weight of 240.30 g/mol. This compound is valued for its role as a building block in organic synthesis and is suitable for cell culture applications. Tech Serve Solutions supplies L-Cystine with a high degree of purity, meeting stringent quality standards for research and development purposes.
- IUPAC
- (R,R)-3,3′-Dithiobis(2-aminopropionicacid)
- Synonyms
- (R,R)-3,3′-Dithiobis(2-aminopropionicacid)L-Cystine
![L-Cystine ([-SCH2CH(NH2)CO2H]2) — chemical structure, CAS 56-89-3; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F56-89-3.png&w=3840&q=75)
Organic Synthesis Building Block
L-Cystine serves as a key precursor and building block in the synthesis of various complex organic molecules. Its unique disulfide bridge and amino acid structure make it valuable in peptide chemistry and the creation of sulfur-containing compounds.
Cell Culture Applications
This amino acid derivative is suitable for use in cell culture media. It plays a role in supporting cellular growth and metabolic processes, particularly in specialized cell lines that may have specific nutritional requirements.
Research and Development
As a well-defined chemical compound, L-Cystine is widely utilised in academic and industrial research settings. Its applications span biochemistry, medicinal chemistry, and materials science, contributing to a better understanding of biological systems and the development of new chemical entities.
| Molecular weight | 240.30 |
|---|---|
| Linear formula | [-SCH2CH(NH2)CO2H]2 |
| Assay | 98.5-101.0% |
| Grade | produced by Wacker Chemie AG, Burghausen, Germany |
| Solubility | 1 M HCl: soluble100 mg/mL |
| Optical activity | [α]/D -224 to -218° |
| Loss on drying | ≤0.2% loss on drying |
| Melting point | >240 °C (dec.)(lit.) |
| Impurities tested | endotoxin, tested |
| Suitability | meets EP testing specificationssuitable for cell culture |
| Water hazard class (WGK, DE) | 2 |
|---|---|
| Cation traces | As: ≤1 ppmFe: ≤10 ppmPb: ≤5 ppm |
| Anion traces | chloride (Cl-): ≤0.020%sulfate (SO42-): ≤0.030% |
| Ignition residue | ≤0.1% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is L-Cystine used for?
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L-Cystine is primarily used as a building block in organic synthesis and is suitable for cell culture applications. It is also employed in various research and development contexts within biochemistry and medicinal chemistry.
What are the CAS number and chemical formula for L-Cystine?
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The CAS number for L-Cystine is 56-89-3 and its chemical formula is [-SCH2CH(NH2)CO2H]2.
What grade and purity does Tech Serve Solutions supply for L-Cystine?
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Tech Serve Solutions supplies L-Cystine with an assay of 98.5-101.0%. It is produced by Wacker Chemie AG, Burghausen, Germany and meets EP testing specifications, suitable for cell culture. It is not represented as USP, BP, or EP grade unless explicitly stated.
What are the safety considerations when handling L-Cystine?
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L-Cystine is classified under WGK Germany 2. Standard laboratory precautions should be observed, including wearing appropriate personal protective equipment. Refer to the Safety Data Sheet (SDS) for comprehensive handling and safety information.
How is L-Cystine packed, shipped, and exported by TSS?
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L-Cystine is carefully packed to ensure stability during transit. Tech Serve Solutions, as a specialist global supplier and exporter, manages the logistics for international shipments, adhering to all relevant regulations for chemical export.
How can I request a sample or quote for L-Cystine?
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To request a sample or a quote for L-Cystine, please contact our sales department through the TSS website or by calling our customer service line. Our team will be pleased to assist you with your specific requirements.
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