Description

4,4,5,5-Tetramethyl-1,3-Dioxolane is a high-purity, cyclic acetal compound with the CAS registry number 5660-63-9. It serves as a versatile and valuable intermediate and solvent in advanced organic synthesis and specialty chemical manufacturing. This product is essential for industries requiring precise chemical building blocks, particularly in pharmaceuticals, agrochemicals, and fragrance development.

Application

• Pharmaceutical Intermediate: Used in the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Acts as a key precursor in the production of pesticides, herbicides, and plant growth regulators.
• Fragrance & Flavor Industry: Employed as a building block for creating specific, stable aroma chemicals.
• Specialty Solvent: Functions as a reaction medium for sensitive chemical transformations where stability and purity are critical.
• Polymer Chemistry: Utilized as a monomer or cross-linking agent in the development of specialty polymers and resins.
• Organic Synthesis Reagent: Serves as a protecting group for carbonyl compounds or as a scaffold in multi-step synthetic routes.

Basic Information

Product Name	4,4,5,5-Tetramethyl-1,3-Dioxolane
CAS No.	5660-63-9
Molecular Formula	C7H14O2
Molecular Weight	130.18 g/mol
Synonyms	2,2,3,3-Tetramethyl-1,4-dioxaspiro[4.4]nonane (incorrect but common misnomer); 1,3-Dioxolane, 4,4,5,5-tetramethyl-; Pinacol Formal; Tetramethyl Dioxolane; 2,2,3,3-Tetramethyl-1,4-dioxaspiro[4.4]nonane (systematic name based on structure); Acetaldehyde pinacol cyclic acetal
EINECS	227-104-7

Quality Control

Our 4,4,5,5-Tetramethyl-1,3-Dioxolane is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chromatography and spectroscopy, to ensure it meets the high-purity standards required for synthetic applications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment.

Storage

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

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%

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