D-Cystine
D-Cystine (CAS: 349-46-2), with the linear formula [-SCH2CH(NH2)CO2H]2 and a molecular weight of 240.30 g/mol, is a naturally occurring amino acid derivative. It is formed by the oxidation of two cysteine molecules, creating a disulfide bond. D-Cystine serves as a crucial building block in various chemical syntheses and finds applications in chemical biology and peptide chemistry research.
- IUPAC
- (S,S)-3,3′-Dithiobis(2-aminopropionic acid)
![D-Cystine ([-SCH2CH(NH2)CO2H]2) — chemical structure, CAS 349-46-2; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F349-46-2.png&w=3840&q=75)
Chemical Synthesis
D-Cystine is employed as a starting material or intermediate in the synthesis of more complex organic molecules and peptides. Its disulfide linkage and amino acid functionalities offer versatile reaction sites for synthetic chemists.
Peptide Chemistry
This compound is valuable in peptide research, particularly for studies involving disulfide bond formation and stability. It can be incorporated into synthetic peptides to mimic natural disulfide bridges.
Chemical Biology Research
D-Cystine is utilised in biochemical studies, including research into protein folding, redox processes, and the biological roles of sulfur-containing amino acids. Its presence can be important for understanding cellular pathways.
| Molecular weight | 240.30 |
|---|---|
| Linear formula | [-SCH2CH(NH2)CO2H]2 |
| Assay | 98% |
| Optical activity | [α]20/D +212°, c = 1 in 1 M HCl |
| Melting point | 265 °C (dec.)(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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 D-Cystine used for?
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D-Cystine is used in chemical synthesis, peptide chemistry, and chemical biology research, often as a building block for complex molecules or for studying disulfide bond formation.
What are the CAS number and chemical formula for D-Cystine?
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The CAS number for D-Cystine is 349-46-2, and its linear formula is [-SCH2CH(NH2)CO2H]2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies D-Cystine with an assay of 98%. This product is intended for research and laboratory use; TSS does not represent it as USP, BP, EP, or any other pharmacopoeia grade.
How should D-Cystine be handled?
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D-Cystine is classified with Water Hazard Class 3 (WGK 3) in Germany. When handling, it is essential to wear safety eyeshields and gloves, and use a suitable respirator filter such as type N95 (US) or type P1 (EN143).
Does Tech Serve Solutions export D-Cystine?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including D-Cystine, and can arrange shipments worldwide.
How can I request a quote or sample of D-Cystine?
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To request a quote or a sample of D-Cystine, please contact our sales team through the website or by phone, providing your specific requirements.
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