Description

L-Cysteine, n-Acetyl-S-Ethyl- is a specialized, modified cysteine derivative that offers enhanced stability and specific reactivity for advanced biochemical applications. This compound is valued for its role as a key intermediate and building block in the synthesis of pharmaceuticals, peptides, and fine chemicals. It is particularly relevant for researchers and manufacturers in the pharmaceutical, biotechnology, and nutraceutical industries seeking to develop novel therapeutic agents or improve product stability.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting neurological or metabolic pathways.
• Peptide Synthesis: Serves as a protected cysteine derivative in solid-phase and solution-phase peptide synthesis to prevent unwanted disulfide bond formation.
• Biochemical Research: Employed as a reagent in proteomics research, enzyme studies, and the development of biochemical assays.
• Cosmetic & Personal Care: Potential use as a precursor for ingredients in hair care and skin care formulations due to its sulfur-containing structure.
• Food & Nutrition Science: May be investigated as a precursor for flavor enhancers or nutrients in specialized dietary supplements.
• Chemical Synthesis: Acts as a chiral building block for the production of more complex organic molecules and fine chemicals.

Basic Information

Product Name	L-Cysteine, n-Acetyl-S-Ethyl-
CAS No.	31386-36-4
Molecular Formula	C7H13NO3S
Molecular Weight	191.25 g/mol
Synonyms	N-Acetyl-S-ethyl-L-cysteine; S-Ethyl-N-acetyl-L-cysteine; N-Acetyl-S-ethylcysteine; Acetyl-S-ethylcysteine; L-Cysteine, N-acetyl-, S-ethyl ester; (2R)-2-Acetamido-3-(ethylsulfanyl)propanoic acid; N-Acetyl-S-ethyl-L-cysteine; N-Acetyl-S-ethylcysteine (L-form)
EINECS	Contact for details

Quality Control

Our L-Cysteine, n-Acetyl-S-Ethyl- is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets high-purity standards suitable for research and synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, chiral purity, and impurity profiles is provided with every shipment 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 hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% (L-Isomer)
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.