Tris(2,4-ditert-butylphenyl) phosphite
[CAS# 31570-04-4]

Identification

• Classification: Catalysts and additives >> Antioxidant
• Name: Tris(2,4-ditert-butylphenyl) phosphite
• Synonyms: Plastic additive 5
• Molecular Formula: C₄₂H₆₃O₃P
• Molecular Weight: 646.93
• CAS Registry Number: 31570-04-4
• EC Number: 250-709-6
• SMILES: CC(C)(C)C1=CC(=C(C=C1)OP(OC2=C(C=C(C=C2)C(C)(C)C)C(C)(C)C)OC3=C(C=C(C=C3)C(C)(C)C)C(C)(C)C)C(C)(C)C

Properties

• Melting point: 181-184 ºC
• Boiling Point: 594.2±50.0 ºC (760 mmHg), Calc.^*
• Flash Point: 394.0±30.4 ºC, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software.

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H302+H312-H412
• Precautionary Statements: P273-P280

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Acute toxicity	Acute Tox.	4	H312
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319

Discovory and Applicatios

Tris(2,4-ditert-butylphenyl) phosphite, often abbreviated as TDBP, is an organophosphorus compound that plays a significant role in the field of polymer chemistry and materials science. This compound features three 2,4-ditert-butylphenyl groups attached to a phosphite backbone, imparting unique properties that enhance its functionality as an antioxidant and stabilizer in various applications.

The discovery of tris(2,4-ditert-butylphenyl) phosphite can be traced back to the mid-20th century when researchers began to explore the use of phosphite compounds in polymer stabilization. As the need for durable and long-lasting materials increased, scientists sought to develop additives that could improve the thermal and oxidative stability of polymers. TDBP emerged as a promising candidate due to its effective radical scavenging properties and ability to inhibit the degradation of polymers under thermal stress.

One of the primary applications of TDBP is in the stabilization of polyolefins, including polyethylene and polypropylene. These materials are widely used in packaging, automotive, and construction industries. When incorporated into polymer formulations, tris(2,4-ditert-butylphenyl) phosphite effectively mitigates the effects of thermal oxidation, thereby enhancing the longevity and performance of the final products. This capability is particularly crucial in applications where materials are exposed to high temperatures and harsh environmental conditions.

In addition to its role as a polymer stabilizer, TDBP is utilized in the production of various coatings, adhesives, and sealants. Its antioxidant properties not only improve the durability of these formulations but also contribute to maintaining their aesthetic qualities over time. By preventing discoloration and loss of mechanical integrity, tris(2,4-ditert-butylphenyl) phosphite helps ensure that coatings and adhesives perform optimally throughout their intended lifespan.

Another notable application of TDBP is in the synthesis of high-performance thermoplastics. Its incorporation into engineering plastics enhances their thermal stability and processing characteristics, making them suitable for demanding applications in industries such as electronics and aerospace. As the demand for lightweight and durable materials continues to rise, TDBP serves as a critical additive in developing advanced polymer systems.

Despite its numerous benefits, the use of tris(2,4-ditert-butylphenyl) phosphite must be approached with caution due to potential health and environmental concerns associated with organophosphorus compounds. As with many chemical additives, it is essential for manufacturers to adhere to safety guidelines and regulatory standards to minimize risks related to exposure during production and application.

Ongoing research into tris(2,4-ditert-butylphenyl) phosphite focuses on optimizing its performance in various applications and exploring alternative formulations that enhance its effectiveness. Innovations in materials science aim to develop new polymer blends and composites that leverage the antioxidant properties of TDBP while addressing environmental sustainability.

The discovery and application of tris(2,4-ditert-butylphenyl) phosphite exemplify its importance in modern chemistry and materials science. Its roles in stabilizing polymers, coatings, and thermoplastics underscore the compound's impact on enhancing the performance and durability of various products, thereby contributing to advancements in multiple industrial sectors.