Description

L-Cysteine, S-(3-Hydroxypropyl)-, Ethyl Ester is a specialized, high-purity derivative of the amino acid L-cysteine, featuring a hydroxypropyl thioether side chain and an ethyl ester group. This molecular modification enhances its stability and bioavailability, making it a valuable intermediate for advanced pharmaceutical synthesis and biochemical research. It is particularly sought after by R&D chemists and process developers in the pharmaceutical, nutraceutical, and fine chemical industries for applications requiring precise molecular scaffolds.

Application

• Pharmaceutical Intermediate: Key building block for synthesizing novel drug candidates, particularly in areas targeting neurological and metabolic pathways.
• Bioconjugation & Protein Engineering: Utilized as a linker or modifier in the development of antibody-drug conjugates (ADCs) and other biopharmaceuticals due to its reactive thioether and ester groups.
• Peptide Synthesis: Serves as a protected or modified cysteine residue in solid-phase and solution-phase peptide synthesis for research and therapeutic peptides.
• Biochemical Research: Used as a substrate or inhibitor in enzymatic studies and as a tool compound to investigate sulfur-containing metabolic pathways.
• Cosmetic & Personal Care Actives: Potential intermediate for synthesizing advanced active ingredients that promote skin conditioning and antioxidant effects.
• Nutritional Supplement Precursor: Intermediate in the production of specialized, high-value nutraceuticals designed for enhanced absorption and efficacy.

Basic Information

Product Name	L-Cysteine, S-(3-Hydroxypropyl)-, Ethyl Ester
CAS No.	1512670-99-3
Molecular Formula	C8H17NO3S
Molecular Weight	207.29 g/mol
Synonyms	Ethyl S-(3-Hydroxypropyl)-L-cysteinate; L-Cysteine ethyl ester, S-(3-hydroxypropyl) derivative; (2R)-2-Amino-3-[(3-hydroxypropyl)sulfanyl]propanoic acid ethyl ester; S-3-Hydroxypropyl-L-cysteine ethyl ester; NSC 760463; 1512670-99-3; Amino acid derivative C8H17NO3S
EINECS	Contact for details

Quality Control

Every batch of L-Cysteine, S-(3-Hydroxypropyl)-, Ethyl Ester is manufactured and tested under a strict quality management system. We provide comprehensive analytical data to ensure the product meets the high-purity standards required for pharmaceutical R&D and fine chemical synthesis. A detailed Certificate of Analysis (COA) is supplied with each shipment, confirming identity, purity, and impurity profiles as determined by HPLC, NMR, and other relevant spectroscopic methods.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed in a dry environment to prevent degradation. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation	Contact for details
Water Content (KF)	≤ 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.