Description

Cysteine, Acetate (Ester) (9Ci) is a derivative of the amino acid cysteine, modified with an acetate ester group. This chemical modification enhances its stability and alters its solubility profile, making it a valuable intermediate for advanced synthesis. It is primarily sought by research institutions and industrial manufacturers in the pharmaceutical, nutraceutical, and specialty chemical sectors for applications requiring a protected or functionalized cysteine moiety.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly in peptide-based drugs and prodrugs where controlled release or improved bioavailability is required.
• Biochemical Research: Serves as a key reagent in proteomics and enzymology studies for protein structure-function analysis and as a building block in peptide synthesis.
• Nutraceutical Formulation: Employed in the development of advanced dietary supplements and functional foods, leveraging its role as a precursor to glutathione.
• Cosmetic Ingredient: Acts as a potential raw material in hair care and skin care formulations, contributing to antioxidant and conditioning properties.
• Chemical Synthesis: Functions as a chiral building block and protecting group agent in asymmetric synthesis and the production of fine chemicals.

Basic Information

Product Name	Cysteine, Acetate (Ester) (9Ci)
CAS No.	60333-15-5
Molecular Formula	C5H9NO3S
Molecular Weight	163.19 g/mol
Synonyms	L-Cysteine acetate ester; Cysteine acetate; Cysteine acetic acid ester; Acetylcysteine ester; (2R)-2-Acetamido-3-sulfanylpropanoic acid; N-Acetyl-L-cysteine methyl ester (related analog); S-Acetylcysteine (related analog); NSC 163063
EINECS	Contact for details

Quality Control

Our Cysteine, Acetate (Ester) (9Ci) is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including identity confirmation, purity assay, and impurity profiling, to ensure it meets the stringent requirements of research and industrial applications. Certificates of Analysis (COA) are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); therefore, containers must be kept tightly sealed after opening to prevent degradation due to moisture absorption.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation	Specific range available on COA
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residual Solvents	Meets ICH guidelines

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