Molekula
L-Cystine
L-Cystine is a disulfide-bonded dimer of the amino acid L-cysteine, used in biochemical research, cell culture media, and pharmaceutical formulations for its role in protein structure and antioxidant activity. It has a CAS number of 56-89-3, molecular formula [-SCH2CH(NH2)CO2H]2, and a molecular weight of 240.30 g/mol. Stable at ambient storage conditions. Molekula supplies L-Cystine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
L-Cystine is a disulfide-bonded dimer of the amino acid L-cysteine, used in biochemical research, cell culture media, and pharmaceutical formulations for its role in protein structure and antioxidant activity. It has a CAS number of 56-89-3, molecular formula [-SCH2CH(NH2)CO2H]2, and a molecular weight of 240.30 g/mol. Stable at ambient storage conditions. Molekula supplies L-Cystine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystals or crystalline powder |
| Specific rotation | -215° to -225° |
| Conclusion | Conforms to USP Specification |
| Heavy metals | ≤ 0.0015% |
| Loss on Drying | ≤ 0.20% |
| Chloride (Cl) | ≤ 0.10% |
| Assay | 98.5% to 101.5% |
| Particle Size | Approx 80 mesh/ 165 micron. |
| Residual on Ignition | ≤ 0.10% |
| Iron (Fe) | ≤ 0.003% |
| Sulphate (SO4) | ≤ 0.040% |
| Arsenic (As) | ≤ 1.5ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Shelf Life | 24 months |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| CAS Number | 56-89-3 |
| Molecular Formula | [-SCH2CH(NH2)CO2H]2 |
| Molecular Weight | 240.30 |
| SMILES | O=C(O)C(N)CSSCC(N)C(=O)O |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29309092 |
| Tariff Code | 2930901300 |
Safety & GHS
For research and industrial use only
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Pricing & pack sizes
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is L-Cystine used for?
L-Cystine is primarily used in pharmaceuticals, cosmetics, and dietary supplements for its role in protein synthesis and antioxidant properties.
What is the chemical formula and molecular weight of L-Cystine?
The formula is [-SCH2CH(NH2)CO2H]2 and the molecular weight is 240.30 g/mol.
How should L-Cystine be stored?
Store at ambient temperature, protected from moisture and light.
What grade of L-Cystine does Molekula supply?
Molekula supplies L-Cystine in pharmaceutical grade.
Can Molekula supply L-Cystine in bulk?
Yes, Molekula can supply L-Cystine in bulk quantities upon request.
What documentation comes with an order of L-Cystine?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS).
Ready to order or need a custom pack?
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