Description

Cysteine, S-(2-Aminoethyl)- (9Ci) CAS NO 61423-60-7 is a specialized derivative of the amino acid cysteine, featuring an aminoethyl group attached to the sulfur atom. This structural modification makes it a valuable intermediate and building block in organic synthesis and biochemical research. It is primarily sought by manufacturers and researchers in the pharmaceutical, biotechnology, and fine chemical sectors. Its unique structure facilitates applications in peptide synthesis, cross-linking, and the development of novel bioactive compounds.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, particularly those requiring thiol-reactive or chelating functionalities.
• Bioconjugation & Cross-linking Agent: Serves as a key reagent for modifying proteins, peptides, and antibodies to create stable conjugates for diagnostics and targeted therapies.
• Peptide Synthesis: Acts as a protected or modified cysteine derivative in solid-phase and solution-phase peptide synthesis to introduce specific properties.
• Biochemical Research: Employed in studying enzyme mechanisms, redox biology, and metal-binding sites due to its reactive thiol and amine groups.
• Cosmetic & Personal Care Ingredients: Potential use in the synthesis of precursors for hair care and skin conditioning agents.
• Chelating Agent Precursor: Used to synthesize ligands for metal chelation in various industrial and analytical processes.

Basic Information

Product Name	Cysteine, S-(2-Aminoethyl)- (9Ci)
CAS No.	61423-60-7
Molecular Formula	C5H12N2O2S
Molecular Weight	164.22 g/mol
Synonyms	S-(2-Aminoethyl)cysteine; 2-Amino-3-(2-aminoethylsulfanyl)propanoic acid; L-Cysteine, S-(2-aminoethyl)-; S-Aminoethylcysteine; 2-Amino-3-[(2-aminoethyl)thio]propionic acid; NSC 113935; AE-Cys
EINECS	Contact for details

Quality Control

Our Cysteine, S-(2-Aminoethyl)- is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis, and identity confirmation (IR, NMR). We provide Certificates of Analysis (COA) with detailed specifications for trace metals, residual solvents, and related substances. Our quality commitment ensures reliable batch-to-batch consistency for your critical R&D and manufacturing processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); therefore, 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%
Optical Rotation	Contact for details
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.