Molekula
L-Cysteine hydrochloride anhydrous
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
L-Cysteine hydrochloride anhydrous is a sulfur-containing amino acid used in biochemical research, pharmaceuticals, and food additives. In food production it serves as a flour treatment agent and dough conditioner, and it is also used as a flavoring agent and in cosmetic formulations. It functions as a reducing agent and stabilizer in various formulations. Available with CAS number 52-89-1, molecular formula C3H7NO2S·HCl, and molecular weight 157.62 g/mol. Store at 2 to 8 °C. Signal word: Warning. Molekula supplies L-Cysteine hydrochloride anhydrous 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.
Often bought together
Pricing & pack sizes
In stock — same-day dispatch
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 — £39.50 per pack ex VAT · £47.40 inc. VAT
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1 kg — £154.60 per pack ex VAT · £185.52 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 |
| Water | ≤2.0% |
| Specific rotation | +5.6° - +8.9° |
| Heavy metals | ≤10ppm |
| Identification | Infrared absorption spectrum |
| pH | 1.5 - 2 |
| Loss on Drying | ≤2.0% |
| Assay | 98.0 - 102% |
| Residue on Ignition | ≤0.1% |
| Other amino acids | Chromatographically not detectable |
| Arsenic trioxide (As2O3) | ≤1ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 29268471 |
| CAS Number | 52-89-1 |
| IUPAC Name | (2R)-2-amino-3-sulfanylpropanoic acid;hydrochloride |
| EC Number | 200-157-7 |
| Molecular Formula | C3H7NO2S·HCl |
| Molecular Weight | 157.62 |
| Exact Mass | 156.9964 |
| SMILES | C([C@@H](C(=O)O)N)S.Cl |
| InChIKey | IFQSXNOEEPCSLW-DKWTVANSSA-N |
| InChI | InChI=1S/C3H7NO2S.ClH/c4-2(1-7)3(5)6;/h2,7H,1,4H2,(H,5,6);1H/t2-;/m0./s1 |
| PubChem CID | 60960 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 29309049 |
| Tariff Code | 2930901600 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- 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, Norwegian, 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 3-Mercaptoalanine hydrochloride
- Cystein chloride
- Cysteine (as hydrochloride)
- Cysteine chlorhydrate
- CYSTEINE HYDROCHLORIDE
- Cysteine hydrochloride (anhydrous)
- cysteine-hcl
- EK 2367
- ELCYS
- WR 348
Frequently asked questions
What is L-Cysteine hydrochloride anhydrous used for?
It is commonly used as a reducing agent in biochemical research and as a precursor in the synthesis of other compounds, including pharmaceuticals and cosmetics.
What is the chemical formula and molecular weight?
The formula is C3H7NO2S·HCl with a molecular weight of 157.62 g/mol.
How should L-Cysteine hydrochloride anhydrous be stored?
Store at 2 to 8 °C in a cool, dry place, protected from light and moisture.
What grade is available?
Available in laboratory grade; please contact us for custom grades or specifications.
Can Molekula supply it in bulk?
Yes, we can supply L-Cysteine hydrochloride anhydrous in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA); additional documentation such as MSDS/SDS is available upon request.
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.