Description

4-[(Methylsulfonyl)Oxy]-Benzeneacetic Acid is a high-purity, versatile chemical intermediate featuring a reactive methylsulfonyloxy (mesylate) group. This compound is critical for facilitating controlled chemical transformations, particularly in the synthesis of complex molecules where precise functional group manipulation is required. It is primarily sought after by research institutions and manufacturers in the pharmaceutical and agrochemical sectors for developing active ingredients and novel compounds.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), especially for introducing the phenylacetic acid moiety or as a protected/activated precursor.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and plant growth regulators.
• Organic Synthesis & Research: Serves as a versatile reagent in academic and industrial R&D for constructing complex organic molecules, leveraging the mesylate group as a good leaving group in substitution reactions.
• Fine Chemical Production: Employed in the manufacture of specialty chemicals, dyes, and performance materials where specific aromatic acetic acid derivatives are needed.

Basic Information

Product Name	4-[(Methylsulfonyl)Oxy]-Benzeneacetic Acid
CAS No.	64369-79-5
Molecular Formula	C9H10O5S
Molecular Weight	230.24 g/mol
Synonyms	4-(Methanesulfonyloxy)phenylacetic Acid; p-(Methylsulfonyloxy)phenylacetic Acid; 4-Hydroxyphenylacetic Acid Methylsulfonate Ester; [4-(Methylsulfonyloxy)phenyl]acetic Acid; Benzeneacetic acid, 4-[(methylsulfonyl)oxy]-; Mesylate Ester of 4-Hydroxyphenylacetic Acid
EINECS	Contact for details

Quality Control

Our 4-[(Methylsulfonyl)Oxy]-Benzeneacetic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure it meets exacting standards for research and industrial use. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Melting Point	Contact for details

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