Description

n-Propionyl-L-Cysteine is a chemically modified derivative of the amino acid L-Cysteine, where a propionyl group is attached to the thiol moiety. This modification enhances its stability and bioavailability, making it a valuable intermediate and active ingredient in pharmaceutical and nutraceutical formulations. It is primarily utilized by manufacturers in the life sciences sector for the development of mucolytic agents, antioxidant supplements, and as a precursor in advanced synthesis.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of advanced active pharmaceutical ingredients (APIs), particularly those targeting respiratory conditions.
• Mucolytic Agent: Used in the formulation of medications designed to break down mucus in the airways, aiding in the treatment of chronic obstructive pulmonary disease (COPD) and bronchitis.
• Antioxidant & Detoxification Support: Incorporated into dietary supplements and nutraceuticals for its role in supporting the body's glutathione synthesis and detoxification pathways.
• Biochemical Research: Serves as a critical reagent in proteomics research and as a substrate for studying enzyme activity related to cysteine metabolism.
• Cosmeceutical Ingredient: Utilized in advanced skincare formulations for its antioxidant properties and potential to support skin barrier function.

Basic Information

Product Name	n-Propionyl-L-Cysteine
CAS No.	2885-79-2
Molecular Formula	C6H11NO3S
Molecular Weight	177.22 g/mol
Synonyms	Propionylcysteine; L-Propionylcysteine; N-(1-Oxopropyl)-L-cysteine; (R)-2-Acetamido-3-mercaptopropanoic acid propionate; S-Propionyl-L-cysteine; NSC 113233; Acetylcysteine propionate derivative
EINECS	220-760-6

Quality Control

Our n-Propionyl-L-Cysteine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis, and residual solvent screening, to ensure it meets stringent specifications for pharmaceutical and nutraceutical use. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with relevant standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.5%
Optical Rotation [α]20/D	-90° to -100° (c=1 in H2O)
Heavy Metals	≤ 10 ppm
Residual Solvents (GC)	Meets ICH Q3C guidelines
Loss on Drying	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.