Description

Cysteine, Hydrazide, L- is a specialized derivative of the amino acid L-cysteine, where the carboxylic acid group is replaced by a hydrazide functional group. This modification imparts unique reactivity, making it a valuable bifunctional building block for the synthesis of complex molecules and bioconjugates. It is primarily utilized by researchers and manufacturers in the pharmaceutical, biotechnology, and fine chemical sectors for applications ranging from drug discovery to the development of advanced materials.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of peptide-based drugs, enzyme inhibitors, and other bioactive molecules.
• Bioconjugation Reagent: Used for site-specific labeling and crosslinking of proteins, antibodies, and other biomolecules due to its reactive hydrazide and thiol groups.
• Chemical Biology Research: A valuable tool for probing protein structure and function, and for developing activity-based probes.
• Chelating Agent Synthesis: Employed in the production of specialized chelators for metal ions, useful in catalysis or medical imaging.
• Polymer Modification: Acts as a functional monomer or crosslinker for creating polymers with tailored properties such as redox activity or biocompatibility.
• Antioxidant Research: Investigated for its potential antioxidant properties derived from its cysteine backbone.

Basic Information

Product Name	Cysteine, Hydrazide, L-
CAS No.	58100-26-8
Molecular Formula	C3H9N3O2S
Molecular Weight	151.19 g/mol
Synonyms	L-Cysteine hydrazide; (R)-2-Amino-3-mercaptopropanehydrazide; Cys-NHNH2; L-2-Amino-3-mercaptopropionic acid hydrazide; H-Cys-NHNH2; L-Cysteine hydrazide hydrochloride (salt form); L-Cys-NHNH2; 3-Mercapto-L-alanine hydrazide
EINECS	Contact for details

Quality Control

Our Cysteine, Hydrazide, L- is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity, chiral analysis, and identity confirmation, to ensure it meets the high standards required for research and synthesis. Certificates of Analysis (COA) with detailed specifications are provided for 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). This compound is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider desiccants or inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation	[α]20/D: Specific range provided on COA
Water Content (KF)	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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