Description

L-Cysteine, S-(Hydroxymethyl)- (9Ci) is a chemically modified derivative of the amino acid L-cysteine, featuring a hydroxymethyl group attached to the sulfur atom. This specific functionalization makes it a valuable synthetic intermediate and a building block for creating more complex molecules in pharmaceutical and biochemical research. It is primarily sought after by research institutions and manufacturers in the life sciences sector for applications in drug discovery, peptide synthesis, and biochemical studies. The compound is supplied with a high level of purity to meet the stringent requirements of advanced research and development.

Application

• Pharmaceutical Intermediate: Used in the synthesis of novel drug candidates and active pharmaceutical ingredients (APIs), particularly those targeting thiol-mediated biological pathways.
• Peptide Synthesis: Serves as a protected or modified cysteine residue in solid-phase and solution-phase peptide synthesis for research and therapeutic peptides.
• Biochemical Research: Employed as a tool compound to study enzyme mechanisms, protein folding, and redox biology due to its reactive thiol group modification.
• Cross-linking Agent: Acts as a precursor or reagent in the development of cross-linkers for bioconjugation and material science applications.
• Reference Standard: Utilized as an analytical standard in quality control laboratories for method development and validation in pharmaceutical analysis.

Basic Information

Product Name	L-Cysteine, S-(Hydroxymethyl)- (9Ci)
CAS No.	77813-95-7
Molecular Formula	C4H9NO3S
Molecular Weight	151.18 g/mol
Synonyms	S-(Hydroxymethyl)-L-cysteine; (R)-2-Amino-3-((hydroxymethyl)thio)propanoic acid; L-Cysteine S-(hydroxymethyl); HMC; NSC 113935; 2-Amino-3-[(hydroxymethyl)sulfanyl]propanoic acid
EINECS	Contact for details

Quality Control

Our L-Cysteine, S-(Hydroxymethyl)- (9Ci) is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity, spectroscopic identification (IR, NMR), and chiral purity analysis to ensure identity, strength, and quality. Certificates of Analysis (COA) with detailed test results are available upon request for 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 should be handled in a dry environment to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation	[α]20/D: Specific range available on COA
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.