Cysteine hydrochloride monohydrate
CAS 7048-04-6
EC 615-117-8
Formula C3H7NO2S.ClH.H2O
MW 175.63 g/mol
Amino Acids & Peptides Personal Care & CosmeticsFood & NutritionPharmaceuticals & Healthcare Humectant & MoisturizingAntioxidant & StabilizerSurface Modification & Wetting
Description
Cysteine Hydrochloride Monohydrate (CAS 7048-04-6) is the hydrochloride salt form of the amino acid L-Cysteine, supplied as a stabilised, water-soluble solid. It is commonly referenced as L-Cysteine HCl H2O, H-Cys-OH HCl H2O, or simply Cysteine HCl. No E-code designation applies to this form.
In bakery manufacturing, it functions as a dough reducing agent by cleaving disulfide bonds in gluten proteins, shortening mixing time and improving extensibility. In personal care formulations, it acts as both a hair and skin conditioner and antioxidant, protecting thiol-sensitive actives from oxidative degradation while supporting moisture retention through humectant activity.
This material is available in pharmaceutical and food-grade specifications, with compliance to Ph.Eur. and FCC monographs as applicable. It falls under REACH registration requirements within the EU (EC 615-117-8, HS 29309099). Standard packaging formats include fibre drums and multi-layer bags for bulk procurement.
In bakery manufacturing, it functions as a dough reducing agent by cleaving disulfide bonds in gluten proteins, shortening mixing time and improving extensibility. In personal care formulations, it acts as both a hair and skin conditioner and antioxidant, protecting thiol-sensitive actives from oxidative degradation while supporting moisture retention through humectant activity.
This material is available in pharmaceutical and food-grade specifications, with compliance to Ph.Eur. and FCC monographs as applicable. It falls under REACH registration requirements within the EU (EC 615-117-8, HS 29309099). Standard packaging formats include fibre drums and multi-layer bags for bulk procurement.
Physical Properties
| Melting Point | 175°C |
| Density | 1.51 g/cm³ |
| Appearance | white crystalline powder |
| Color | White |
| Form | Solid |
| Water Solubility | Soluble in cold water. |
| Vapor Pressure | <0.1 hPa (20 °C) |
| Refractive Index | 6 ° (C=8, 1mol/L HCl) |
| pH | 0.8-1.2 (100g/l, H2O, 20℃) |
| Log P | 0.235 (est) |
Safety & Handling (Learn More)
Warning GHS07
H
H302H315H319H335
P
P261P264P270P271P280P319P321P330P405P501P264+P265P301+P317P302+P352P304+P340P332+P317P337+P317P362+P364P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29309099 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
L-Cysteine monohydrate monochlorideL-cysteine hydrochloride monohydrateCYSTEINE HCL H2OH-CYS-OH HCL H2OL-Cysteine HCl H2OH-L-CYS-OH HCL H2OCysteine hydrochlorideL-Cysteine HCl Monohydrate
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Raw Materials
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