Description

(Ac-Cys-Oh)2 CAS NO 5545-17-5 is a high-purity, protected derivative of the amino acid L-cysteine, specifically the disulfide dimer of N-acetyl-L-cysteine. This compound is crucial for advanced peptide synthesis and biochemical research, offering enhanced stability and controlled reactivity compared to its unprotected counterparts. It is primarily needed by pharmaceutical R&D teams, peptide manufacturers, and academic research laboratories developing novel therapeutics and studying redox biology.

Application

• Peptide Synthesis: Serves as a key protected building block for the controlled incorporation of cysteine residues into synthetic peptides and proteins.
• Pharmaceutical Intermediates: Used in the research and development of active pharmaceutical ingredients (APIs) that require disulfide bridges for structural integrity.
• Biochemical Research: Employed as a model compound or reagent in studies of thiol-disulfide exchange, oxidative stress, and protein folding mechanisms.
• Reference Standard: Utilized as a high-purity analytical standard in quality control laboratories for method development and validation.
• Cosmetic & Nutraceutical R&D: Investigated for potential applications in formulations where stabilized cysteine derivatives are of interest.

Basic Information

Product Name	(Ac-Cys-Oh)2
CAS No.	5545-17-5
Molecular Formula	C10H16N2O6S2
Molecular Weight	324.37 g/mol
Synonyms	N,N'-Diacetyl-L-cystine; Diacetylcystine; L-Cystine, N,N'-diacetyl-; N-Acetyl-L-cystine; Bis(N-acetyl-L-cysteine); N-Acetylcystine; Ac-Cys-OH disulfide; (N-Acetyl-L-cysteinyl) disulfide
EINECS	226-896-6

Quality Control

Our (Ac-Cys-Oh)2 is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure it meets the stringent requirements for research and synthesis. Certificates of Analysis (COA) detailing all specifications are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under dry conditions to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥98.0%
Optical Rotation	-95° to -105° (c=1 in 1N HCl)
Water Content (KF)	≤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.