Description

Spiro[5.5]Undecan-1-One is a high-purity, versatile spirocyclic ketone building block with the CAS number 1781-83-5. This compound is valued for its unique rigid, three-dimensional structure, which is critical for imparting specific steric and electronic properties in advanced molecular synthesis. It is primarily sought after by research chemists and process development scientists in the pharmaceutical, agrochemical, and fragrance industries for the development of novel active ingredients and specialty chemicals.

Application

• Pharmaceutical Intermediate: Serves as a key scaffold in medicinal chemistry for the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders.
• Agrochemical Synthesis: Used as a building block for creating new pesticides and herbicides with enhanced efficacy and environmental profiles.
• Fragrance & Flavor Chemistry: Acts as a precursor for musky and amber odorants, contributing to long-lasting and complex scent profiles in perfumery.
• Material Science Research: Employed in the development of advanced polymers and organic electronic materials due to its rigid, non-planar geometry.
• Organic Synthesis & Catalysis: Functions as a ligand precursor or a chiral auxiliary in asymmetric synthesis, facilitating the creation of enantiomerically pure compounds.

Basic Information

Product Name	Spiro[5.5]Undecan-1-One
CAS No.	1781-83-5
Molecular Formula	C11H18O
Molecular Weight	166.26 g/mol
Synonyms	1-Oxaspiro[5.5]undecane; Spiro[5.5]undecanone; 1-Oxaspiro(5.5)undecane; 1781-83-5; Spiro-5.5-undecan-1-one; Spiro(5.5)undecan-1-one; Ketone, spiro[5.5]undecan-1-; NSC 163022
EINECS	217-224-3

Quality Control

Our Spiro[5.5]Undecan-1-One is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing, including chromatography (GC/HPLC) and spectroscopic methods (NMR, IR), to ensure identity, purity, and consistency. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications. We support cGMP and ISO standards for research and development applications.

Storage

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

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 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.