Description

Tetrahydromethyl-1,3-Isobenzofurandione is a specialized organic compound belonging to the class of substituted phthalide derivatives. This chemical serves as a versatile and valuable synthetic intermediate in advanced organic synthesis, enabling the construction of complex molecular architectures. It is primarily sought after by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and fine chemical sectors for developing active ingredients and novel materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds with heterocyclic or fused-ring structures.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and fungicides, contributing to novel modes of action.
• Fine Chemical Production: Serves as a precursor for dyes, pigments, and other high-value specialty chemicals.
• Polymer Chemistry: Can be utilized as a monomer or modifying agent in the synthesis of specialty polymers with tailored properties.
• Academic & Industrial Research: A valuable reagent for methodological development and exploring new chemical reactions in organic chemistry laboratories.
• Material Science: Potential applications in the development of organic electronic materials or advanced coatings.

Basic Information

Product Name	Tetrahydromethyl-1,3-Isobenzofurandione
CAS No.	11070-44-3
Molecular Formula	C9H10O3
Molecular Weight	166.17 g/mol
Synonyms	4-Methyl-1,3-dihydroisobenzofuran-1,3-dione; 4-Methylphthalide-3-carboxylic acid (lactone form); 3-Carboxy-4-methylphthalide; 4-Methyl-1,3-dioxoisoindoline (tautomer); Tetrahydro-4-methyl-1,3-isobenzofurandione; 4-Methylhomophthalic anhydride (common name); 1,3-Dihydro-4-methyl-1,3-dioxoisobenzofuran
EINECS	Contact for details

Quality Control

Our Tetrahydromethyl-1,3-Isobenzofurandione is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide Certificates of Analysis (COA) with key parameters including assay, impurity profile, and physical characteristics. 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 a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to exclude moisture. Keep away from strong acids and incompatible organic solvents.

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	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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