Description

Dodecyl Bis(4-Nonylphenyl) Phosphite is a specialized organophosphite compound widely used as a high-performance secondary antioxidant and process stabilizer. Its primary value lies in its ability to effectively decompose hydroperoxides, thereby preventing polymer degradation and extending material lifespan during high-temperature processing and long-term use. This chemical is essential for manufacturers in the plastics, synthetic rubber, and lubricant industries who require robust stabilization solutions for their products.

Application

• As a secondary antioxidant (hydroperoxide decomposer) in polyolefins (PP, PE) and engineering plastics.
• As a process stabilizer during the high-temperature extrusion and molding of polymers.
• In synthetic lubricants and grease formulations to enhance oxidative stability.
• As a stabilizer component in adhesives, sealants, and elastomers like SBR and polybutadiene.
• For color preservation in pigmented plastic products by preventing oxidative yellowing.
• In fiber and film applications to maintain tensile strength and clarity.

Basic Information

Product Name	Dodecyl Bis(4-Nonylphenyl) Phosphite
CAS No.	84787-76-8
Molecular Formula	C42H71O3P
Molecular Weight	654.98 g/mol
Synonyms	Bis(4-nonylphenyl) dodecyl phosphite; Dodecyl hydrogen bis(4-nonylphenyl) phosphite; Phosphorous acid, bis(4-nonylphenyl) dodecyl ester; Antioxidant 288; AO 288; Weston 288; Doverphos S-288; Phosphite stabilizer 288; Tris(4-nonylphenyl) phosphite derivative
EINECS	Contact for details

Quality Control

Our production of Dodecyl Bis(4-Nonylphenyl) Phosphite adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including assay, color, and acidity determination, to ensure it meets precise specification limits. Certificates of Analysis (COA) documenting purity and key physical properties are provided as standard to guarantee supply reliability and performance consistency for your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and should be kept under a dry inert atmosphere (e.g., nitrogen) after opening to prevent oxidation and hydrolysis. Keep away from strong oxidizers.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (APHA)	≤ 100
Assay (HPLC)	≥ 95.0%
Acidity (as H3PO4)	≤ 0.1%
Phosphorus Content	4.5 - 5.0%
Refractive Index (20°C)	1.520 - 1.530
Density (20°C)	0.97 - 1.00 g/mL
Identification (IR)	Conforms

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