Description

Cyclohexyl Cysteinate is a specialized organic compound featuring a cysteine moiety esterified with cyclohexanol. This molecular structure makes it a valuable intermediate and building block in advanced organic synthesis, particularly for applications requiring chiral amino acid derivatives. It is primarily utilized by research institutions and industrial manufacturers in the pharmaceutical and fine chemical sectors. The compound is known under the CAS registry number 139560-16-0.

Application

Cyclohexyl Cysteinate serves as a versatile intermediate with several key industrial and research applications:

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those targeting neurological or metabolic pathways.
• Peptide Synthesis: Acts as a protected cysteine derivative for the solid-phase and solution-phase synthesis of complex peptides and peptidomimetics.
• Bioconjugation Chemistry: Employed in the development of antibody-drug conjugates (ADCs) and other bioconjugates due to its reactive thiol group, which can be selectively deprotected.
• Flavor & Fragrance Precursor: Serves as a starting material for creating sulfur-containing flavor compounds and aroma chemicals.
• Research Chemical: Used in academic and industrial R&D for studying enzyme inhibition, receptor binding, and as a standard in analytical method development.
• Cosmetic Ingredient Synthesis: Incorporated into the production of specialized, bioactive ingredients for skincare formulations.

Basic Information

Product Name	Cyclohexyl Cysteinate
CAS No.	139560-16-0
Molecular Formula	C9H17NO2S
Molecular Weight	203.30 g/mol
Synonyms	L-Cysteine, cyclohexyl ester; Cyclohexyl L-cysteinate; (R)-2-Amino-3-mercaptopropanoic acid cyclohexyl ester; Cysteine cyclohexyl ester; 139560-16-0; Cyclohexyl 2-amino-3-sulfanylpropanoate
EINECS	Contact for details

Quality Control

Our Cyclohexyl Cysteinate is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis to confirm enantiomeric excess, and identity confirmation via IR and NMR. We provide full traceability and batch-specific Certificates of Analysis (COA) to ensure compliance with your research or cGMP-grade requirements.

Storage

Preserve in a tightly closed container, protected from light. Due to its property of being easily oxidized, long-term storage under an inert atmosphere (argon or nitrogen) is recommended. Store in a cool, dry place at a controlled room temperature (15-25°C). 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%
Chiral Purity (HPLC)	≥ 99.0% ee
Loss on Drying	≤ 0.5%
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.