Description

L-Cysteine, n-(Hydroxymethyl)- (9Ci) is a chemically modified derivative of the amino acid L-cysteine, featuring a hydroxymethyl group on the nitrogen atom. This modification enhances its stability and reactivity, making it a valuable intermediate for synthesizing more complex biochemical compounds. It is primarily sought by manufacturers in the pharmaceutical, cosmetic, and specialty chemical industries for research and production purposes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly in drugs targeting neurological or metabolic pathways.
• Bioconjugation Reagent: Serves as a key building block for creating peptide-based drugs, antibody-drug conjugates (ADCs), and other biopharmaceuticals.
• Cosmetic Ingredient: Acts as a precursor for hair conditioning agents and skin-care actives that promote keratin synthesis and protection.
• Biochemical Research: Employed in proteomics and molecular biology studies as a tool for protein modification and labeling.
• Food & Nutrition Science: Investigated for potential use as a stabilizer or precursor for flavor enhancers in specialized nutritional formulations.
• Chemical Synthesis: Functions as a chiral synthon in organic chemistry for the production of fine chemicals and catalysts.

Basic Information

Product Name	L-Cysteine, n-(Hydroxymethyl)- (9Ci)
CAS No.	34580-89-7
Molecular Formula	C4H9NO3S
Molecular Weight	151.18 g/mol
Synonyms	N-(Hydroxymethyl)-L-cysteine; L-Cysteine, N-(hydroxymethyl)-; N-Hydroxymethyl-L-cysteine; (R)-2-Amino-3-((hydroxymethyl)amino)-3-oxopropanoic acid; NSC 113928; Amino acid derivative C4H9NO3S
EINECS	Contact for details

Quality Control

Our L-Cysteine, n-(Hydroxymethyl)- (9Ci) is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets high-purity standards suitable for research and synthesis. Certificates of Analysis (COA) with detailed batch-specific results are available upon request.

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). Due to its hygroscopic (moisture-sensitive) and easily oxidized nature, it is recommended to handle under an inert atmosphere and minimize exposure to air and humidity for long-term stability.

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%
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.