Description

Msc-Onsu CAS NO 57903-15-8 is a specialized chemical intermediate known for its unique reactivity profile. This compound is valued for its role in facilitating complex synthetic transformations, particularly in controlled environments. It is primarily utilized by research and development teams in the pharmaceutical and advanced materials sectors for constructing novel molecular architectures.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates.
• Peptide Chemistry: Used as a coupling or protecting group reagent in solid-phase and solution-phase peptide synthesis.
• Bioconjugation: Facilitates the site-specific labeling and cross-linking of proteins, antibodies, and other biomolecules for diagnostic and therapeutic applications.
• Polymer Modification: Serves as a functional monomer or cross-linking agent for creating specialty polymers with tailored properties.
• Material Science Research: Employed in the development of advanced organic frameworks, dendrimers, and surface-functionalized nanomaterials.
• Chemical Biology Probes: Integral to the synthesis of activity-based probes and affinity labels for studying enzyme function and protein interactions.

Basic Information

Product Name	Msc-Onsu
CAS No.	57903-15-8
Molecular Formula	C11H11NO5S
Molecular Weight	269.27 g/mol
Synonyms	2-Methylsulfonyl-4-nitrophenyl Chloroformate; 4-Nitro-2-(methylsulfonyl)phenyl Chloroformate; 2-(Methylsulfonyl)-4-nitrophenyl Chloroformate; MSC-ONSu; Msc-ONSu Chloroformate; 4-Nitro-2-methylsulfonylphenyl Chloroformate; (4-Nitro-2-methylsulfonylphenyl) Carbonochloridate
EINECS	Contact for details

Quality Control

Every batch of Msc-Onsu is manufactured and tested under strict quality management protocols to ensure consistency and reliability for critical research and production applications. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles 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). This material is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to maintain stability and purity. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Single Unknown Impurity	≤ 0.5%

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