Description

4-tert-Butylphthalic Anhydride is a specialized organic intermediate featuring a sterically hindered tert-butyl group on the phthalic anhydride core. This compound matters for its role as a key building block in the synthesis of high-performance polymers, advanced resins, and specialty chemicals, where its structure imparts valuable properties like enhanced solubility and thermal stability. It is primarily needed by manufacturers in the polymer, epoxy resin, and specialty chemical industries for creating tailored materials with specific performance characteristics.

Application

• As a critical monomer or co-monomer in the production of high-performance polyimides and polyamide-imides for electronics and aerospace applications.
• In the synthesis of modified epoxy resins and curing agents to improve flexibility, adhesion, and chemical resistance.
• As a key intermediate for manufacturing specialty plasticizers, dyes, and pharmaceutical intermediates.
• For research and development of novel liquid crystal polymers (LCPs) and other advanced engineering plastics.
• In the production of alkyd resins for high-quality coatings and paints requiring improved durability.
• As a building block for complexing agents and chelators used in various industrial processes.

Basic Information

Product Name	4-tert-Butylphthalic Anhydride
CAS No.	32703-79-0
Molecular Formula	C12H12O3
Molecular Weight	204.22 g/mol
Synonyms	4-(1,1-Dimethylethyl)phthalic Anhydride; 4-tert-Butylphthalic Acid Anhydride; 4-t-Butylphthalic Anhydride; 4-(tert-Butyl)phthalic Anhydride; 1,3-Isobenzofurandione, 5-(1,1-dimethylethyl)-; 5-tert-Butylphthalic Anhydride; 4-tert-Butyl-1,3-dihydro-1,3-dioxoisobenzofuran; 4-(tert-Butyl)benzene-1,2-dicarboxylic Anhydride
EINECS	251-188-6

Quality Control

Our 4-tert-Butylphthalic Anhydride is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity and consistency. Certificates of Analysis (COA) documenting key parameters such as assay, melting point, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 20 ppm

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