Description

Benzenesulfonic Acid, Pentamethyl-, 4-Formylphenyl Ester (9Ci) is a specialized aromatic sulfonate ester derivative, serving as a high-value synthetic intermediate and functional monomer. Its molecular structure, featuring both formyl and pentamethyl-substituted benzenesulfonyl groups, makes it a critical building block for advanced material science and fine chemical synthesis. This compound is primarily utilized by R&D chemists and process engineers in the pharmaceutical, agrochemical, and polymer industries for developing novel active ingredients and performance materials.

Application

• Pharmaceutical Intermediate: Used in the synthesis of novel drug candidates, particularly those requiring sulfonate ester linkages or formyl groups for further functionalization.
• Agrochemical Synthesis: Serves as a key precursor in the development of advanced herbicides, fungicides, and plant growth regulators.
• Polymer & Material Science: Acts as a functional monomer or cross-linking agent for creating specialty polymers, resins, and coatings with tailored properties.
• Liquid Crystal & OLED Materials: Employed in the research and production of electronic display components and organic light-emitting diodes due to its aromatic and polar characteristics.
• Photoinitiator & UV Stabilizer Precursor: Utilized in the formulation of photo-sensitive materials and additives for plastics and coatings.
• Organic Synthesis Reagent: Functions as a versatile reagent in organic transformations, including coupling reactions and as a protecting group intermediate.

Basic Information

Product Name	Benzenesulfonic Acid, Pentamethyl-, 4-Formylphenyl Ester (9Ci)
CAS No.	647824-27-9
Molecular Formula	C20H24O4S
Molecular Weight	360.47 g/mol
Synonyms	4-Formylphenyl Pentamethylbenzenesulfonate; Pentamethylbenzenesulfonic Acid 4-Formylphenyl Ester; 4-Formyl Phenyl 2,3,4,5,6-Pentamethylbenzenesulfonate; 2,3,4,5,6-Pentamethylbenzenesulfonic Acid 4-Formylphenyl Ester; 4-Hydroxybenzaldehyde Pentamethylbenzenesulfonate Ester; (4-Formylphenoxy)sulfonyl-1,2,3,4,5-pentamethylbenzene; p-Formylphenyl Pentamethylbenzenesulfonate
EINECS	Contact for details

Quality Control

Our Benzenesulfonic Acid, Pentamethyl-, 4-Formylphenyl Ester is manufactured under strict 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 the high standards required for research and industrial synthesis. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%

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