Description

Dodecyl Bis[4-[1-(4-Hydroxyphenyl)-1-Methylethyl]Phenyl] Phosphite is a high-performance, sterically hindered phosphite antioxidant. This compound is engineered to provide exceptional stability and longevity to polymeric materials by effectively scavenging free radicals and decomposing hydroperoxides. It is an essential additive for manufacturers in the plastics, rubber, and synthetic fiber industries seeking to enhance product durability and prevent thermal and oxidative degradation during processing and end-use.

Application

• Primary stabilizer and antioxidant in polyolefins (PP, HDPE, LDPE) and engineering plastics.
• Processing stabilizer for polymers subjected to high-temperature extrusion and molding, preventing melt flow degradation and color formation.
• Long-term thermal stabilizer for rubber compounds and synthetic elastomers.
• Additive in adhesive and sealant formulations to improve shelf-life and performance stability.
• Stabilizer component in synthetic fibers to maintain tensile strength and color fidelity.
• Used in polymer masterbatches and concentrates for efficient dispersion and handling.

Basic Information

Product Name	Dodecyl Bis[4-[1-(4-Hydroxyphenyl)-1-Methylethyl]Phenyl] Phosphite
CAS No.	60381-07-9
Molecular Formula	C46H63O5P
Molecular Weight	726.96 g/mol
Synonyms	Doverphos S-9228; Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite (common alternate); Phosphorous acid, dodecyl bis[4-[1-(4-hydroxyphenyl)-1-methylethyl]phenyl] ester; Antioxidant 9228; Sterically hindered phosphite; Tris(2,4-di-tert-butylphenyl) phosphite analog; Thioester phosphite stabilizer; Polymeric phosphite antioxidant
EINECS	Contact for details

Quality Control

Every batch of our phosphite antioxidant is produced under strict quality management systems. We employ advanced analytical techniques, including HPLC and FTIR, to ensure high purity and consistent performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment, ensuring full traceability and compliance with customer specifications.

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). This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or flakes
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	180 - 185 °C
Volatile Matter	≤ 0.5 %
Solution Color (APHA)	≤ 50

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