Description

3,9-Bis(1,1-Dimethyl-2-Hydroxyethyl)-2,4,8,10-Tetraoxaspiro[5.5]Undecane is a high-purity, multifunctional spirocyclic diol compound valued for its unique molecular structure and reactivity. This chemical serves as a critical building block and performance additive, offering enhanced stability and functionality in advanced material formulations. It is essential for manufacturers in the polymer, coatings, and specialty chemical industries seeking to improve product durability and performance characteristics.

Application

• As a key monomer or chain extender in the synthesis of high-performance, weatherable polyurethanes and polyesters.
• Functioning as a reactive diluent and crosslinking agent in advanced coatings, adhesives, and sealants to enhance hardness and chemical resistance.
• Utilized as a stabilizer or modifier in epoxy resin systems to improve flexibility and thermal properties.
• Employed in the production of specialty polymers for optical lenses and electronic encapsulants due to its spirocyclic structure.
• Serving as an intermediate in pharmaceutical and agrochemical synthesis for constructing complex molecular architectures.
• Acting as a compatibilizer or additive in polymer blends to optimize material performance and processing.

Basic Information

Product Name	3,9-Bis(1,1-Dimethyl-2-Hydroxyethyl)-2,4,8,10-Tetraoxaspiro[5.5]Undecane
CAS No.	1455-42-1
Molecular Formula	C₁₅H₂₈O₆
Molecular Weight	304.38 g/mol
Synonyms	Spiroglycol; 3,9-Bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane; 1,1-Bis(hydroxymethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol; Pentacrythritol Bis-Spiroformal; Spirocyclic Diol; Bis-MPD Spiroformal; 1455-42-1; Spiroglycol Diol
EINECS	215-925-9

Quality Control

Our 3,9-Bis(1,1-Dimethyl-2-Hydroxyethyl)-2,4,8,10-Tetraoxaspiro[5.5]Undecane is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Production adheres to current Good Manufacturing Practices (cGMP) where applicable. Each lot is supported by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles, available upon request.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	110 - 115 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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