Description

n-Stearoyl-L-Cysteine is a high-purity, synthetic amino acid derivative where stearic acid is conjugated to the L-isomer of cysteine. This compound is valued for its unique amphiphilic structure, which provides both lipophilic and hydrophilic properties, making it a versatile intermediate and functional ingredient. It is primarily sought by manufacturers in the pharmaceutical, cosmetic, and advanced material sectors for applications requiring biocompatibility, surfactant activity, or as a building block for peptide synthesis.

Application

• Pharmaceutical Intermediates: Used in the synthesis of specialized drug candidates and prodrugs, particularly those targeting skin delivery or requiring enhanced lipid solubility.
• Cosmetic & Personal Care Actives: Serves as a key ingredient in high-end skincare formulations for its potential moisturizing, antioxidant, and skin-barrier reinforcing properties.
• Bioconjugation & Research Chemicals: Acts as a valuable reagent in biochemical research for protein/peptide modification and the study of lipidated amino acids.
• Surfactant & Emulsifier Systems: Utilized in the development of specialized, mild emulsifiers for sensitive dermatological and cosmetic preparations.
• Advanced Material Synthesis: Employed as a precursor or modifier in creating functional polymers and biomaterials with specific surface properties.

Basic Information

Product Name	n-Stearoyl-L-Cysteine
CAS No.	67603-50-3
Molecular Formula	C21H41NO3S
Molecular Weight	387.62 g/mol
Synonyms	L-Cysteine, N-stearoyl-; N-Octadecanoyl-L-cysteine; Stearic acid L-cysteine amide; N-(1-Oxo-octadecyl)-L-cysteine; (R)-2-Amino-3-(stearoyldithio)propanoic acid; NSC 334368; Stearoyl cysteine
EINECS	Contact for details

Quality Control

Our n-Stearoyl-L-Cysteine is manufactured under strict quality management systems. Each batch is subjected to comprehensive analytical testing, including identification, purity assay, and impurity profiling, to ensure it meets exacting standards for research and industrial use. Certificates of Analysis (COA) with detailed chromatographic data (HPLC) are provided to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its light-sensitive nature and propensity to be easily oxidized, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation	[α]20/D: Specific range provided on COA
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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