Description

n-Isobutyryl-D-Cysteine is a high-purity, custom-synthesized chiral building block and pharmaceutical intermediate. This compound is of significant value in the research and development of novel active pharmaceutical ingredients (APIs), particularly for its role in creating stereochemically defined molecules. It is primarily needed by pharmaceutical R&D laboratories, biotechnology companies, and fine chemical manufacturers focused on peptide mimetics, prodrug development, and metabolic studies.

Application

• Pharmaceutical intermediate for the synthesis of novel Active Pharmaceutical Ingredients (APIs).
• Chiral building block in asymmetric synthesis and medicinal chemistry research.
• Precursor for prodrug development, leveraging the cysteine moiety for targeted delivery.
• Bioconjugation reagent for modifying peptides, proteins, or other biomolecules.
• Reference standard for analytical method development and quality control in pharmaceutical manufacturing.
• Research chemical for studying enzyme inhibition and metabolic pathways.
• Starting material for the synthesis of specialized ligands and catalysts.

Basic Information

Product Name	n-Isobutyryl-D-Cysteine
CAS No.	124529-07-3
Molecular Formula	C7H13NO3S
Molecular Weight	191.25 g/mol
Synonyms	D-Cysteine, N-(2-methylpropanoyl)-; (R)-2-((2-Methylpropanoyl)amino)-3-sulfanylpropanoic acid; N-Isobutyryl-D-cysteine; D-N-Isobutyrylcysteine; (R)-2-(Isobutyrylamino)-3-mercaptopropanoic acid; Isobutyryl-D-cysteine; 124529-07-3
EINECS	Contact for details

Quality Control

Our n-Isobutyryl-D-Cysteine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity verification and impurity profiling, to ensure it meets the stringent requirements for pharmaceutical research. A detailed Certificate of Analysis (COA) confirming identity, purity, and specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at controlled room temperature (15-25°C) in a cool, dry, and well-ventilated place. This material is easily oxidized and moisture-sensitive; prolonged exposure to air should be avoided.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (HPLC)	≥ 99.0% D-isomer
Loss on Drying	≤ 0.5%
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.