Description

2-Ethoxy-3,4-dihydro-2H-pyran is a versatile heterocyclic ether and a valuable chemical intermediate in organic synthesis. Its primary commercial value lies in its role as a protected form of 4-hydroxybutanal, enabling the controlled introduction of the 1,4-dicarbonyl synthon in complex molecule construction. This compound is essential for research chemists and process development scientists in the pharmaceutical, agrochemical, and fine chemical industries seeking to build complex molecular architectures with high selectivity.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of various active pharmaceutical ingredients (APIs), particularly those requiring tetrahydrofuran or butyrolactone ring systems.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators that incorporate specific oxygen-containing heterocycles.
• Fine Chemical Production: Serves as a precursor for flavors, fragrances, and specialty polymers where its masked aldehyde functionality is strategically unveiled.
• Academic & Industrial Research: Employed as a versatile reagent in methodological development and total synthesis projects for natural products and novel materials.
• Material Science: Acts as a monomer or cross-linking agent in the development of specialized resins and polymers with tailored properties.

Basic Information

Product Name	2-Ethoxy-3,4-dihydro-2H-pyran
CAS No.	103-75-3
Molecular Formula	C7H12O2
Molecular Weight	128.17 g/mol
Synonyms	2-Ethoxy-3,4-dihydro-2H-pyran; 2-Ethoxy-5,6-dihydro-2H-pyran; 3,4-Dihydro-2-ethoxy-2H-pyran; Ethyl 3,4-dihydro-2H-pyran-2-yl ether; 2-Ethoxydihydropyran; Dihydro-2-ethoxy-2H-pyran; 2H-Pyran, 2-ethoxy-3,4-dihydro-
EINECS	203-141-5

Quality Control

Our 2-Ethoxy-3,4-dihydro-2H-pyran is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chromatography (GC/HPLC) and spectroscopy (IR, NMR), to ensure identity, purity, and consistency. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications. We support cGMP and ISO 9001 standards for our manufacturing processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use. Recommended storage temperature is 2-8°C for long-term stability, though short-term storage at 15-25°C is acceptable.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.435 - 1.445
Density (20°C)	0.95 - 0.99 g/mL

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