Description

Tris(6-tert-Butyl-m-Tolyl) Phosphite is a high-performance organophosphite antioxidant widely used in polymer stabilization. Its primary value lies in its exceptional ability to prevent oxidative degradation and thermal breakdown in various polymeric materials, thereby extending their service life and maintaining their physical properties. This compound is essential for manufacturers in the plastics, rubber, and synthetic fiber industries who require reliable protection for their products against heat and environmental stress during processing and end-use.

Application

• Primary antioxidant and processing stabilizer for polyolefins (PP, HDPE, LDPE).
• Thermal stabilizer for engineering plastics such as ABS, polycarbonate, and nylon.
• Synergistic component in stabilization packages for synthetic rubbers and elastomers.
• Protective additive in adhesives, sealants, and polymer coatings to prevent embrittlement.
• Stabilizer for polyurethane foams and other thermoset polymers during production.
• Used in the masterbatch and compound manufacturing to ensure consistent polymer quality.
• Contributes to color retention and prevents yellowing in clear and pigmented polymer articles.

Basic Information

Product Name	Tris(6-tert-Butyl-m-Tolyl) Phosphite
CAS No.	13468-92-3
Molecular Formula	C33H45O3P
Molecular Weight	520.68 g/mol
Synonyms	Tris(2-tert-butyl-5-methylphenyl) phosphite; Phosphorous acid, tris(2-tert-butyl-5-methylphenyl) ester; 6-tert-Butyl-m-cresyl phosphite; Antioxidant 168 (common industry designation); Irgafos 168 (trade name); Tris(2-tert-butyl-5-methylphenyl) phosphite; TBMPP; AO-168
EINECS	236-675-6

Quality Control

Our production of Tris(6-tert-Butyl-m-Tolyl) Phosphite adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material is routinely analyzed against established specifications using advanced techniques like HPLC and GC. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every shipment 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 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	White crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Melting Point	182 - 186 °C
Volatile Matter	≤ 0.5 %
Acidity (as H3PO4)	≤ 0.1 %

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