Bis(2,4-DI-tert-butyl-6-methyl phenyl) ethyl phosphite
[CAS# 145650-60-8]

Identification

• Classification: Organic raw materials >> Organic phosphine compound
• Name: Bis(2,4-DI-tert-butyl-6-methyl phenyl) ethyl phosphite
• Synonyms: bis(2,4-ditert-butyl-6-methylphenyl) ethyl phosphite
• Molecular Formula: C₃₂H₅₁O₃P
• Molecular Weight: 514.72
• CAS Registry Number: 145650-60-8
• EC Number: 416-140-4
• SMILES: CCOP(OC1=C(C=C(C=C1C)C(C)(C)C)C(C)(C)C)OC2=C(C=C(C=C2C)C(C)(C)C)C(C)(C)C

Properties

• Boiling Point: 497.4±45.0 ºC (760 mmHg), Calc.^*
• Flash Point: 318.2±29.0 ºC, Calc.^*

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

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H315-H319
• Precautionary Statements: P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413

Discovory and Applicatios

Bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite is an organic compound primarily used as a stabilizer and flame retardant in various industrial applications. The molecule, featuring a phosphite group bonded to two bulky phenyl rings with tert-butyl and methyl substituents, is known for its excellent thermal stability and antioxidant properties. These features make it a valuable additive in the manufacturing of plastics, coatings, and other polymer-based materials.

The discovery of bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite can be attributed to the increasing demand for additives that improve the performance and longevity of polymers exposed to high temperatures or oxidative environments. Phosphite compounds have long been studied for their ability to act as stabilizers, preventing the degradation of materials by scavenging free radicals and reducing the formation of peroxides. The incorporation of bulky tert-butyl and methyl groups in the molecular structure of bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite further enhances its steric hindrance, contributing to its stability and efficacy in various industrial processes.

One of the primary applications of bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite is in the production of polyolefins, such as polyethylene and polypropylene. These polymers are widely used in packaging, automotive, and construction industries, but they are prone to degradation when exposed to heat or ultraviolet light. The addition of bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite helps to preserve the structural integrity of the polymer, ensuring that it maintains its mechanical properties over time. This phosphite compound can also be used in conjunction with other stabilizers to provide synergistic effects, improving the performance of the final product.

Another important application of bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite is as a flame retardant in plastics and coatings. When used in combination with other flame retardant agents, it helps reduce the flammability of materials, making them safer for use in a variety of environments. The compound acts by inhibiting the oxidative processes that lead to the ignition of materials, effectively delaying or preventing combustion. This property is particularly valuable in applications where fire safety is a critical concern, such as in electrical cables, automotive parts, and construction materials.

In addition to its role in polymer stabilization and flame retardancy, bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite is also utilized in lubricant formulations. The compound's antioxidant properties help extend the life of lubricants, ensuring that machinery and equipment remain functional for longer periods without the need for frequent oil changes. This is particularly important in industries such as automotive manufacturing and heavy machinery, where long-lasting lubrication is essential for smooth operation and cost efficiency.

In summary, bis(2,4-di-tert-butyl-6-methyl phenyl) ethyl phosphite is a highly effective stabilizer and flame retardant that has found widespread use in the plastics, coatings, and lubrication industries. Its excellent thermal stability, antioxidant properties, and flame-retardant capabilities make it an invaluable additive for improving the durability and safety of materials in various applications.