Description

Ethyl Dl-Cysteinate CAS NO 69685-04-7 is a synthetic derivative of the amino acid cysteine, where the carboxylic acid group is esterified with ethanol. This modification enhances its lipophilicity, making it a valuable intermediate in the synthesis of more complex molecules, particularly in pharmaceutical and nutraceutical research. It is primarily utilized by R&D chemists and process development scientists in the life sciences sector for applications ranging from peptide synthesis to the development of radioprotective agents and antioxidants.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), especially those requiring a protected or modified cysteine moiety.
• Peptide Synthesis: Used in solid-phase and solution-phase peptide chemistry as a precursor for introducing cysteine derivatives into peptide chains.
• Biochemical Research: Serves as a substrate or precursor in enzymatic studies and metabolic pathway investigations.
• Antioxidant Formulation: Investigated for use in developing compounds with potential radioprotective or antioxidant properties.
• Cosmetic Ingredient Synthesis: Intermediate in the production of hair care and skin care actives that leverage thiol chemistry.
• Nutritional Supplement Research: Explored as a precursor for more bioavailable forms of cysteine derivatives in nutraceutical applications.

Basic Information

Product Name	Ethyl Dl-Cysteinate
CAS No.	69685-04-7
Molecular Formula	C5H11NO2S
Molecular Weight	149.21 g/mol
Synonyms	DL-Cysteine ethyl ester; Ethyl DL-cysteine ester; 2-Amino-3-mercaptopropanoic acid ethyl ester; Cysteine ethyl ester, DL-; Ethyl 2-amino-3-mercaptopropanoate; (±)-Cysteine ethyl ester; H-Cys-OEt
EINECS	Contact for details

Quality Control

Our Ethyl Dl-Cysteinate is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including identification, purity assay, and impurity profiling, to ensure it meets the high standards required for research and synthesis. Certificates of Analysis (COA) documenting specifications such as assay (by HPLC), chiral purity, and residual solvents are provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled under dry conditions to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Optical Purity (Chiral HPLC)	DL-mixture (racemic)
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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