Seleno-DL-cystine
Seleno-DL-cystine (CAS: 2897-21-4), a diselenium analogue of cystine with the chemical formula C6H12N2O4Se2 and a molecular weight of 334.09 g/mol, is a notable dipeptide. Typically supplied as a powder, it is recognized for its applications in biochemical research and as a reagent. Stored at -20°C, Seleno-DL-cystine is a specialized compound requiring careful handling due to its hazardous nature.

Biochemical Research
Seleno-DL-cystine serves as a valuable tool in biochemical and biophysical research. Its unique selenium-containing structure allows for investigations into seleno-enzymes and the role of selenium in biological systems.
Reagent in Synthesis
As a specialized dipeptide, Seleno-DL-cystine can be employed as a reagent in complex organic synthesis, particularly where selenium incorporation is desired for specific chemical properties or downstream applications.
Analytical Standards
In certain analytical chemistry applications, Seleno-DL-cystine may be utilized as a reference standard for the identification and quantification of selenium-containing compounds.
| Molecular weight | 334.09 |
|---|---|
| Empirical formula | C6H12N2O4Se2 |
| Form | powder |
| Storage temperature | −20°C |



Hazard statements
- H301Toxic if swallowed
- H331Toxic if inhaled
- H373May cause damage to organs through prolonged exposure
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P301IF SWALLOWED
- P311Call a POISON CENTER or doctor
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1/PG 3 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 23/25-33-50/53 |
| Safety statements (S) | 20/21-28-45-60-61 |
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 Seleno-DL-cystine used for?
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Seleno-DL-cystine is primarily used in biochemical research and as a reagent in synthesis. Its structure makes it useful for studying selenium's role in biological systems and for specific chemical modifications.
What is the CAS number and chemical formula for Seleno-DL-cystine?
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The CAS number for Seleno-DL-cystine is 2897-21-4, and its chemical formula is C6H12N2O4Se2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Seleno-DL-cystine as a technical or research grade powder. We do not represent this product as USP, BP, EP, or any other pharmacopoeial standard.
How should Seleno-DL-cystine be handled safely?
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Seleno-DL-cystine is classified as toxic if swallowed or inhaled and may cause damage to organs through prolonged exposure (H301-H331-H373). It is also very toxic to aquatic life with long-lasting effects (H410). Handle with appropriate personal protective equipment including eyeshields, faceshields, gloves, and a P2 respirator, in a well-ventilated area. Avoid release to the environment.
How is Seleno-DL-cystine packed, shipped, and exported?
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Seleno-DL-cystine is supplied as a powder and is shipped according to international regulations for hazardous materials, including UN 2811 classification. As a global supplier, Tech Serve Solutions manages the export of this chemical worldwide.
How can I request a sample or quote for Seleno-DL-cystine?
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To request a sample or a quote for Seleno-DL-cystine, please contact our sales team through the website or by phone. Provide your contact details and the quantity required.
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