Description

3,9-Bis(3-Aminopropyl)-2,4,8,10-Tetraoxaspiro[5.5]Undecane is a high-purity, multifunctional spirocyclic amine compound, valued for its unique molecular architecture that provides dual primary amine functionality within a rigid, ketal-protected framework. This structure makes it a critical building block and crosslinking agent for advanced polymer synthesis, offering enhanced thermal stability and controlled reactivity. It is essential for manufacturers in the epoxy resin, polyurethane, and specialty coatings industries seeking to develop high-performance, durable materials.

Application

• Epoxy Curing Agent & Hardener: Functions as a high-performance, low-viscosity curing agent for epoxy resins, imparting excellent thermal and chemical resistance to composites, adhesives, and electronic encapsulants.
• Polyurethane Chain Extender & Crosslinker: Serves as a chain extender or crosslinking agent in polyurethane systems, enhancing mechanical properties, hydrolytic stability, and modulus for elastomers, coatings, and foams.
• Pharmaceutical & Agrochemical Intermediate: Acts as a key synthetic intermediate in the production of complex molecules for pharmaceutical active ingredients and advanced agrochemicals.
• Dendrimer & Hyperbranched Polymer Synthesis: Utilized as a core or branching unit in the construction of dendrimers and hyperbranched polymers for drug delivery, catalysis, and nanotechnology applications.
• Corrosion Inhibitor Formulation: Incorporated into formulations for metal surface treatments and corrosion-inhibiting primers due to its chelating and film-forming properties.
• Ion-Exchange Resin & Chelating Agent: Used in the synthesis of specialized ion-exchange resins and chelating polymers for water treatment and metal recovery processes.

Basic Information

Product Name	3,9-Bis(3-Aminopropyl)-2,4,8,10-Tetraoxaspiro[5.5]Undecane
CAS No.	21587-74-6
Molecular Formula	C15H30N2O4
Molecular Weight	302.41 g/mol
Synonyms	3,9-Bis(3-aminopropyl)-2,4,8,10-tetraoxaspiro[5.5]undecane; 1,5-Diamino-3-oxapentane acetal with pentaerythritol; Pentaerythritol bis(3-aminopropyl) acetal; Spirobi(m-dioxane)-3,9-dipropanamine; 2,4,8,10-Tetraoxaspiro[5.5]undecane-3,9-dipropanamine; ATU (Amino Tetraoxa Undecane); Bis(3-aminopropyl) pentaerythritol acetal
EINECS	244-476-1

Quality Control

Our 3,9-Bis(3-Aminopropyl)-2,4,8,10-Tetraoxaspiro[5.5]Undecane is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including assay, identity confirmation, and impurity profiling, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting purity, physical properties, and safety data are available for each lot upon request.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product quality and performance. Keep away from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Color (APHA)	≤ 100
Specific Gravity (20°C)	1.080 - 1.120
Refractive Index (n20D)	1.470 - 1.490
Amino Value	Contact for details

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