Description

Benzoic Acid, 4-(1,1-Dimethylethyl)-, 1-Carboxyethyl Ester (9Ci) is a specialized organic ester derivative of p-tert-butylbenzoic acid, identified by CAS number 177664-56-1. This compound serves as a versatile chemical intermediate and functional additive, valued for its ability to modify polymer properties and impart specific characteristics in advanced formulations. It is primarily required by manufacturers in the polymer, specialty chemical, and performance material industries seeking to enhance product stability and functionality.

Application

• Polymer Additive & Plasticizer: Used as a co-monomer or additive to improve the flexibility, thermal stability, and processing characteristics of engineering plastics and specialty polymers.
• UV Stabilizer & Light Absorber Intermediate: Acts as a key synthetic precursor for manufacturing advanced light stabilizers and UV absorbers used in coatings, films, and packaging materials.
• Synthetic Intermediate for Fine Chemicals: Serves as a crucial building block in the multi-step synthesis of complex organic molecules for agrochemicals and pharmaceuticals.
• Resin Modifier: Employed to modify the properties of synthetic resins, influencing their curing behavior, adhesion, and chemical resistance.
• Lubricant & Fuel Additive Component: Utilized in the formulation of high-performance lubricants and fuel additives where ester functionalities are beneficial.
• Fragrance & Flavor Industry Intermediate: Can be used in the synthesis of certain aroma chemicals and flavoring agents due to its benzoic acid derivative structure.

Basic Information

Product Name	Benzoic Acid, 4-(1,1-Dimethylethyl)-, 1-Carboxyethyl Ester (9Ci)
CAS No.	177664-56-1
Molecular Formula	C14H18O4
Molecular Weight	250.29 g/mol
Synonyms	Ethyl 4-tert-Butylbenzoate; 4-tert-Butylbenzoic Acid Ethyl Ester; Ethyl p-tert-Butylbenzoate; Benzoic Acid, 4-(1,1-Dimethylethyl)-, Ethyl Ester; 1-Carboxyethyl 4-tert-Butylbenzoate; p-tert-Butylbenzoic Acid Ethyl Ester; Ethyl 4-(tert-Butyl)benzoate
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 4-(1,1-Dimethylethyl)-, 1-Carboxyethyl Ester (9Ci) is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and reliable performance for your industrial processes. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance protocols.

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). Keep away from strong oxidizing agents, strong acids, and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index	1.495 - 1.505
Density	1.01 - 1.05 g/cm³

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