Description

7-[2-(2-Hydroxymethylethoxy)Methylethoxy]Tetramethyl-3,6,8,11-Tetraoxa-7-Phosphatridecane-1,13-Diol is a specialized organophosphorus compound with a unique branched polyether structure, valued for its dual functionality as a phosphite antioxidant and a complexing agent. Its molecular design provides excellent performance in stabilizing sensitive materials against oxidative degradation and in chelating metal ions. This chemical is essential for formulators and manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance product longevity and performance under demanding conditions.

Application

• Polymer Stabilization: Acts as a highly effective secondary antioxidant (phosphite) in polyolefins (PP, PE), PVC, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Lubricant & Fuel Additive: Used as an antioxidant and anti-wear agent in synthetic lubricants, greases, and industrial oils to extend service life and protect machinery.
• Metal Deactivator: Functions as a chelating agent to sequester trace metal ions (e.g., copper, iron) that catalyze oxidation in polymers, fuels, and other organic systems.
• Epoxy & Coating Formulations: Employed as a stabilizer and adhesion promoter in epoxy resins, coatings, and adhesives to improve color stability and durability.
• Pharmaceutical & Cosmetic Intermediates: Serves as a key building block or stabilizer in the synthesis of specialty chemicals for advanced applications.
• Research & Development: Utilized in academic and industrial R&D for developing new stabilization systems and studying coordination chemistry.

Basic Information

Product Name	7-[2-(2-Hydroxymethylethoxy)Methylethoxy]Tetramethyl-3,6,8,11-Tetraoxa-7-Phosphatridecane-1,13-Diol
CAS No.	36788-39-3
Molecular Formula	C15H33O9P
Molecular Weight	412.39 g/mol
Synonyms	Bis(2-hydroxyethyl) 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane 3,9-dioxide; 3,9-Bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane-3,9-dioxide bis(2-hydroxyethyl) ester; Spirocyclic Pentaerythritol Bisphosphite; Pentaerythritol Bisphosphite Ester; Antioxidant PEP-B; Phosphite Stabilizer PEP-B; CAS 36788-39-3
EINECS	Contact for details

Quality Control

Our production of 7-[2-(2-Hydroxymethylethoxy)Methylethoxy]Tetramethyl-3,6,8,11-Tetraoxa-7-Phosphatridecane-1,13-Diol adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are provided and available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture. For long-term storage, consider using an inert atmosphere (nitrogen purge) to minimize potential oxidation.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Phosphorus Content	7.0 - 7.8 %
Acidity (as H3PO4)	≤ 0.1 %
Water Content (KF)	≤ 0.5 %
Refractive Index (n20D)	1.470 - 1.480
Density (20°C)	1.15 - 1.25 g/cm³

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