L-Cysteine Monohydrochloride
L-Cys HCl, Cysteine Hydrochloride Monohydrate
- CAS
- 7048-04-6
- EC
- 200-157-7
- Food Code
- E920
- Sectors
- Food & Nutrition, Pharma & Healthcare
L-Cysteine Monohydrochloride (CAS 7048-04-6) is a high-purity amino acid derivative in the form of a white crystalline powder, the hydrochloride salt of cysteine with superior water solubility and stability, used as a dough conditioner in commercial baking and as a stabilizer for oxygen-sensitive pharmaceutical ingredients. It acts as a dough conditioner , improving elasticity and machineability in high-volume production. In the pharmaceutical sector, it serves as an essential stabilizer for oxygen-sensitive active ingredients. The compound is also a critical flavor precursor used to develop savory, meat-like profiles in processed foods. It is valued for its antioxidant properties and role in maintaining molecular integrity in complex liquid formulations.
Typical Properties
| Molecular formula | C3H7NO2S.ClH.H2O |
|---|---|
| Molecular weight | 175.63 g/mol |
| Appearance | white crystalline powder |
| Form | Solid |
| Color | White |
| Melting point | 175°C |
| Density | 1.51 g/cm³ |
| Water solubility | Soluble in cold water. |
| pH | 0.8-1.2 (100g/l, H2O, 20°C) |
| GHS signal word | Warning · Irritant / harmful |
| HS code | 29309099 |
| Grades available | Food Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
L-Cysteine Monohydrochloride
Applications
- Industrial Baking: Reduces mixing time and improves dough texture by breaking disulfide bonds in gluten.
- Pharma Stabilization: Used in parenteral nutrition and as an additive to prevent oxidation in medicinal solutions.
- Savory Flavorings: Reacts with sugars during thermal processing to create authentic, meat-like aromatic compounds.
Safety & Risks
Not classified as a hazardous substance under GHS; however, it may cause mild eye irritation. Use standard PPE including safety glasses and nitrile gloves when handling bulk powder.
Packaging
Standard 25 kg fiber drums with internal PE liners; 25 kg multi-wall paper bags.