Molekula
L-Cystine dihydrochloride
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
L-Cystine dihydrochloride is a sulfur-containing amino acid derivative used in cell culture media, pharmaceuticals, and biochemical research. It serves as a source of cysteine and helps maintain redox balance in biological systems. Available in powder form, it has a molecular weight of 313.22 g/mol, a CAS number of 30925-07-6, and is stable at ambient temperatures. It is classified as dangerous due to its corrosive nature. Molekula supplies L-Cystine dihydrochloride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £154.00 per pack ex VAT · £184.80 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White Crystalline Powder |
| Specific rotation | -152° to -167° |
| Heavy metals | ≤10ppm |
| Identification | Conforms to reference |
| Loss on Drying | ≤5.0% |
| Assay | ≥98.0% |
| Residue on Ignition | ≤0.1% |
| Transmittance | ≥98.0% |
| Iron (Fe) | ≤10ppm |
| Sulphates (SO4)(2-) | ≤0.02% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 22601431 |
| CAS Number | 30925-07-6 |
| IUPAC Name | (2R)-2-amino-3-[[(2R)-2-amino-2-carboxyethyl]disulfanyl]propanoic acid;dihydrochloride |
| EC Number | 250-391-9 |
| Molecular Formula | C6H12N2O4S2 · 2HCl |
| Molecular Weight | 313.22 |
| Exact Mass | 311.9772 |
| SMILES | C([C@@H](C(=O)O)N)SSC[C@@H](C(=O)O)N.Cl.Cl |
| InChIKey | HHGZUQPEIHGQST-RGVONZFCSA-N |
| InChI | InChI=1S/C6H12N2O4S2.2ClH/c7-3(5(9)10)1-13-14-2-4(8)6(11)12;;/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12);2*1H/t3-,4-;;/m0../s1 |
| PubChem CID | 21121987 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| HTS Code | 29309049 |
| Tariff Code | 2930901600 |
Safety & GHS
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Corrosive
GHS05
Hazard statements
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
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.
Synonyms
- (2R,2'R)-3,3'-disulfanediylbis(2-aminopropanoic acid) dihydrochloride
- (H-Cys-OH)2.2HCl
- C6H14Cl2N2O4S2
- cystine dihydrochloride
- L-Cystine (hydrochloride)
- L-CYSTINE 2HCL
- L-Cystine HCl
- L-Cystine HCl Monohydrate
- L-Cystine--hydrogen chloride (1/2)
- L-CYSTINE, HYDROCHLORIDE (1:2)
Frequently asked questions
What is L-Cystine dihydrochloride used for?
It is primarily used as a source of cysteine in biochemical research and cell culture media, and as a precursor in the synthesis of peptides and proteins.
What is the chemical formula and molecular weight of L-Cystine dihydrochloride?
The formula is C6H12N2O4S2 · 2HCl with a molecular weight of 313.22 g/mol.
How should L-Cystine dihydrochloride be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade is available for L-Cystine dihydrochloride?
It is available in research grade, suitable for laboratory use and biochemical applications.
Can Molekula supply L-Cystine dihydrochloride in bulk?
Yes, Molekula can supply L-Cystine dihydrochloride in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an order of L-Cystine dihydrochloride?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS), compliant with regulatory standards.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.