Description

δ-Valerolactone is a versatile five-membered lactone and a key chemical intermediate with significant industrial value. Its unique cyclic ester structure makes it a valuable building block for synthesizing polymers, pharmaceuticals, and fine chemicals. This product is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and specialty polymer industries seeking high-purity intermediates for advanced synthesis.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and prodrugs, particularly those requiring a lactone moiety.
• Polymer & Resin Production: Serves as a monomer or co-monomer for creating biodegradable polymers, polyesters, and specialty resins with tailored properties.
• Flavor & Fragrance Synthesis: Acts as a precursor for lactone-based flavoring agents and aroma compounds used in food and perfumery.
• Agrochemical Manufacturing: Employed as a key intermediate in the production of certain herbicides, fungicides, and plant growth regulators.
• Organic Synthesis Reagent: Utilized in ring-opening reactions, esterifications, and as a starting material for various heterocyclic compounds in fine chemical production.
• Solvent & Reaction Medium: Functions as a polar aprotic solvent for specific organic transformations and polymerization processes.

Basic Information

Product Name	δ-Valerolactone
CAS No.	542-28-9
Molecular Formula	C5H8O2
Molecular Weight	100.12 g/mol
Synonyms	δ-Valerolactone; 5-Pentanolide; 4,5-Dihydro-5-methyl-2(3H)-furanone; 5-Methyldihydrofuran-2(3H)-one; Pentanoic acid, 5-hydroxy-, δ-lactone; 1,4-Pentanolide; δ-Pentanolactone; 5-Valerolactone
EINECS	208-807-7

Quality Control

Our δ-Valerolactone CAS NO 542-28-9 is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets high-purity standards suitable for industrial and research applications. Certificates of Analysis (COA) with detailed specifications for identity, purity, and impurity profiles are available upon request to support your quality assurance protocols.

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 bases, and sources of ignition.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.450 - 1.455
Density (20°C)	1.045 - 1.065 g/mL

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