Description

Benzenesulfonic Acid, 1,1-Dimethylethyl Ester is a specialized organic sulfonate ester, also known by its CAS number 91950-41-3. This compound serves as a versatile intermediate and protecting group reagent in advanced organic synthesis, valued for its reactivity and specific steric profile. It is primarily utilized by research institutions and chemical manufacturers in the pharmaceutical, agrochemical, and specialty chemical sectors for the development of novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly where a sulfonate ester group is required for further functionalization.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators as a reactive intermediate.
• Polymer Chemistry: Acts as a monomer or cross-linking agent in the production of specialty polymers and ion-exchange resins.
• Organic Synthesis Reagent: Employed as a protecting group for sulfonic acids or as a source of the tert-butylsulfonyl moiety in complex molecular constructions.
• Chemical Research: Essential for academic and industrial R&D in developing new synthetic methodologies and exploring structure-activity relationships.
• Dye and Pigment Manufacturing: Intermediate in the synthesis of certain sulfonated dyes and colorants.

Basic Information

Product Name	Benzenesulfonic Acid, 1,1-Dimethylethyl Ester
CAS No.	91950-41-3
Molecular Formula	C10H14O3S
Molecular Weight	214.28 g/mol
Synonyms	tert-Butyl Benzenesulfonate; Benzenesulfonic Acid tert-Butyl Ester; tert-Butyl Phenylsulfonate; 1,1-Dimethylethyl Benzenesulfonate; t-Butyl Benzenesulfonate; Benzenesulfonic Acid t-Butyl Ester; (1,1-Dimethylethyl) Benzenesulfonate; Phenylsulfonic Acid tert-Butyl Ester
EINECS	Contact for details

Quality Control

Our Benzenesulfonic Acid, 1,1-Dimethylethyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical properties. Our quality commitment supports applications requiring high-purity intermediates for research and regulated synthesis.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are sealed tightly after each use to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Density	~1.15 g/cm³

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