Description

5-tert-Butyl Methylisophthalate is a specialized organic ester compound with the CAS number 16308-65-9. This chemical serves as a valuable intermediate and building block in advanced synthesis, prized for its unique sterically hindered tert-butyl group which can impart specific physical and chemical properties to final products. It is primarily required by R&D laboratories and industrial manufacturers in the polymer, pharmaceutical, and specialty chemical sectors for developing novel materials and active ingredients.

Application

• Polymer Chemistry: Used as a monomer or modifying agent in the synthesis of high-performance polyesters and engineering plastics to enhance thermal stability and mechanical properties.
• Pharmaceutical Intermediates: Serves as a key building block in the multi-step synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Liquid Crystal Materials: Acts as a core component or side-chain modifier in the production of liquid crystal polymers and displays.
• Organic Synthesis: Employed as a versatile intermediate for introducing the tert-butyl-isophthalate moiety into more complex organic structures.
• Coatings and Resins: Functions as a cross-linking agent or additive to improve the durability and chemical resistance of specialty coatings and composite resins.
• Agrochemicals: Utilized in the research and development of advanced pesticides and herbicides.

Basic Information

Product Name	5-tert-Butyl Methylisophthalate
CAS No.	16308-65-9
Molecular Formula	C14H18O4
Molecular Weight	250.29 g/mol
Synonyms	Methyl 5-tert-butylisophthalate; 1,3-Benzenedicarboxylic acid, 5-(1,1-dimethylethyl)-, 1-methyl ester; 5-tert-Butylisophthalic acid monomethyl ester; 5-(tert-Butyl)isophthalic acid monomethyl ester; Methyl 5-(tert-butyl)benzene-1,3-dicarboxylate; 5-tert-Butyl-1,3-benzenedicarboxylic acid monomethyl ester
EINECS	Contact for details

Quality Control

Our 5-tert-Butyl Methylisophthalate is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing, including chromatographic purity assays and identity confirmation, to ensure it meets precise customer specifications and industry standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (typically 15-25°C). Keep away from strong oxidizing agents, strong acids, and strong bases.

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%
Residue on Ignition	≤ 0.1%

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