Description

Dilauryl Hydrogen Phosphite is a specialized organophosphorus compound widely recognized for its role as a high-performance secondary antioxidant and stabilizer. Its primary commercial value lies in its ability to effectively decompose hydroperoxides, thereby preventing oxidative degradation and extending the service life of sensitive materials. This makes it an essential additive for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance product durability and performance under demanding conditions.

Application

• Primary or secondary antioxidant in polyolefins (e.g., PP, PE) and other polymers to prevent thermal and oxidative degradation during processing and end-use.
• Stabilizer component in synthetic lubricants and grease formulations to inhibit oxidation and maintain viscosity under high-temperature operation.
• Synergistic co-stabilizer used in combination with primary phenolic antioxidants (e.g., BHT, Irganox) in plastic and rubber compounds for enhanced stabilization efficiency.
• Additive in adhesive and sealant formulations to improve resistance to heat aging and environmental weathering.
• Processing stabilizer for engineering plastics to protect against molecular weight breakdown during high-temperature extrusion and molding.
• Intermediate in the synthesis of other organophosphorus compounds used as flame retardants or specialty plasticizers.

Basic Information

Product Name	Dilauryl Hydrogen Phosphite
CAS No.	21302-09-0
Molecular Formula	C24H51O3P
Molecular Weight	418.63 g/mol
Synonyms	Dilauryl Phosphite; Di-n-dodecyl Hydrogen Phosphite; Di(dodecyl) Hydrogen Phosphite; Bis(1-oxododecyl) Phosphonate; Lauryl Phosphite; Phosphorous Acid, Di-n-dodecyl Ester; Hostanox PAR 24; Doverphos 4
EINECS	244-316-7

Quality Control

Our Dilauryl Hydrogen Phosphite is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications for consistent performance. A Certificate of Analysis (COA) detailing purity, assay, and key parameters is provided with each shipment to guarantee traceability and compliance with your technical requirements.

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 easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 95.0 %
Acid Value	≤ 1.0 mg KOH/g
Phosphorus Content	6.5 - 7.5 %
Color (APHA)	≤ 50
Moisture (KF)	≤ 0.1 %

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