Description

S-Benzyl-n-Stearoyl-L-Cysteine is a high-purity, synthetic cysteine derivative where the thiol group is protected by a benzyl moiety and the amino group is acylated with stearic acid. This specific molecular architecture provides enhanced stability and lipophilicity, making it a valuable intermediate for advanced chemical synthesis and pharmaceutical research. It is particularly sought after by R&D chemists and process development scientists in the pharmaceutical, cosmetic, and specialty chemical industries for applications requiring controlled peptide modification or as a building block for lipid-conjugated drug candidates.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of novel peptide-based therapeutics and prodrugs, leveraging its protected thiol and lipophilic tail.
• Bioconjugation Chemistry: Used for the site-specific modification of peptides, proteins, and antibodies to enhance their stability, bioavailability, or targeting properties.
• Cosmetic Ingredient Synthesis: Acts as a precursor for synthesizing advanced skin-conditioning agents and antioxidants in high-end cosmetic formulations.
• Biochemical Research: Employed as a standard or reagent in studies focusing on thiol-protection strategies, enzyme inhibition, or membrane permeability.
• Material Science: Investigated for use in creating functionalized surfaces or polymers with specific chemical handles derived from its reactive groups.

Basic Information

Product Name	S-Benzyl-n-Stearoyl-L-Cysteine
CAS No.	40379-70-2
Molecular Formula	C₂₈H₄₇NO₃S
Molecular Weight	477.74 g/mol
Synonyms	L-Cysteine, S-benzyl-, N-stearoyl-; N-Stearoyl-S-benzyl-L-cysteine; S-Benzyl-N-stearoylcysteine; N-Octadecanoyl-S-benzyl-L-cysteine; Stearic acid amide of S-benzyl-L-cysteine; (2R)-2-(octadecanoylamino)-3-(phenylmethylsulfanyl)propanoic acid; S-Benzylcysteine Stearamide
EINECS	Contact for details

Quality Control

Our S-Benzyl-n-Stearoyl-L-Cysteine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis, and identity confirmation by IR and NMR spectroscopy, to ensure it meets exacting standards for research and development. A detailed Certificate of Analysis (COA) is provided with every shipment, guaranteeing traceability and consistent quality.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This compound is moisture-sensitive; keep the container tightly sealed in a dry environment to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Optical Rotation [α]²⁰D	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm
Residual Solvents (GC)	Complies with ICH guidelines

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