Molekula
DL-Cysteine
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
DL-Cysteine is a sulfur-containing amino acid used in biochemical research, pharmaceuticals, and food additives. It functions as a reducing agent and precursor in protein synthesis. Available in powder form with a molecular weight of 121.16 g/mol, CAS number 3374-22-9, and molecular formula HSCH2CH(NH2)COOH. Store at 2 to 8 °C. Signal word: Warning. Molekula supplies DL-Cysteine 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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1 g — £23.30 per pack ex VAT · £27.96 inc. VAT
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25 g — £62.60 per pack ex VAT · £75.12 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 crystals/ White crystalline powder |
| Loss on Drying | 0.10% |
| Assay | ≥99% |
| Dichloromethane | <0.10% |
| Residue on Ignition | 0.05% |
| Heavy Metals (Pb) | <5ppm |
| State of solution (10%) | 98.9% |
| Other amino acids | Chromotographically not detected |
| Iron (Fe) | <5ppm |
| Arsenic (As) | <1ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 42875416 |
| CAS Number | 3374-22-9 |
| IUPAC Name | 2-amino-3-sulfanylpropanoic acid |
| EC Number | 222-160-2 |
| Molecular Formula | HSCH2CH(NH2)COOH |
| Molecular Weight | 121.16 |
| Exact Mass | 121.0197 |
| SMILES | C(C(C(=O)O)N)S |
| InChIKey | XUJNEKJLAYXESH-UHFFFAOYSA-N |
| InChI | InChI=1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6) |
| PubChem CID | 594 |
| REACH Code | Y110 |
| HTS Code | 29309092 |
| Tariff Code | 2930901300 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
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.
Synonyms
- (+/-)-2-Amino-3-mercaptopropionic acid
- [35s]cysteine
- 2-amino-3-sulfanyl-propanoic acid
- beta-Mercapto-L -alanine
- CYSTEINE, DL-
- DL-2-Amino-3-mercaptopropionic acid
- DL-Cystein
- H-Cys-OH HCl HO
- Hcys
- Zystein
Frequently asked questions
What is DL-Cysteine used for?
DL-Cysteine is used as a reducing agent in biochemical research, a precursor in peptide synthesis, and in the production of pharmaceuticals and cosmetics.
What is the chemical formula and molecular weight of DL-Cysteine?
The formula is HSCH2CH(NH2)COOH with a molecular weight of 121.16 g/mol.
How should DL-Cysteine be stored?
Store at 2 to 8 °C in a tightly sealed container to prevent oxidation and degradation.
What grade of DL-Cysteine does Molekula supply?
Molekula supplies DL-Cysteine in reagent grade, suitable for laboratory and industrial applications.
Can Molekula supply DL-Cysteine in bulk?
Yes, Molekula can supply DL-Cysteine in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a DL-Cysteine order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.