O,O'-Dioctadecylpentaerythritol bis(phosphite)
[CAS# 3806-34-6]

Identification

• Classification: Catalysts and additives >> Antioxidant
• Name: O,O'-Dioctadecylpentaerythritol bis(phosphite)
• Synonyms: 3,9-Bis(octadecyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane
• Molecular Formula: C₄₁H₈₂O₆P₂
• Molecular Weight: 733.03
• CAS Registry Number: 3806-34-6
• EC Number: 223-276-6
• SMILES: CCCCCCCCCCCCCCCCCCOP1OCC2(CO1)COP(OC2)OCCCCCCCCCCCCCCCCCC

Properties

• Melting point: 44-47 °C
• Boiling Point: 692.2±55.0 °C (760 mmHg), Calc.^*
• Flash Point: 470.7±31.8 °C, Calc.^*, >110 °C

Safety Data

• Hazard Symbols: GHS08 Danger
• Risk Statements: H340-H360-H413
• Safety Statements: P203-P273-P280-P318-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413
Germ cell mutagenicity	Muta.	1B	H340
Reproductive toxicity	Repr.	1B	H360
Eye irritation	Eye Irrit.	2	H319

Discovery and Applications

O,O'-Dioctadecylpentaerythritol bis(phosphite) is a chemical compound known for its role as an effective antioxidant and stabilizer in various industrial applications. This substance, often used in polymer chemistry, has significantly impacted the field of materials science and manufacturing due to its unique chemical properties.

The discovery of O,O'-Dioctadecylpentaerythritol bis(phosphite) emerged from the need for more effective stabilizers to improve the longevity and durability of polymer materials. As a phosphite ester, it was designed to combat the oxidative degradation that polymers often undergo when exposed to heat, light, and oxygen. The development of this compound was part of broader research efforts to enhance the stability and performance of plastics and other synthetic materials.

O,O'-Dioctadecylpentaerythritol bis(phosphite) is primarily utilized as an antioxidant in the polymer industry. Its main function is to prevent the degradation of polymers during processing and use. By incorporating this compound into polymer formulations, manufacturers can significantly extend the lifespan of their products. This application is crucial in industries such as automotive, aerospace, and packaging, where material durability is essential.

One of the notable applications of O,O'-Dioctadecylpentaerythritol bis(phosphite) is in the production of polyethylene and polypropylene. These widely used polymers benefit from the antioxidant properties of the compound, which helps to maintain their mechanical properties and appearance over time. The inclusion of this stabilizer improves the resistance of these materials to environmental stressors such as UV radiation and thermal degradation.

In addition to its use in polymers, O,O'-Dioctadecylpentaerythritol bis(phosphite) is employed in the formulation of various coatings and adhesives. In coatings, it helps to protect the finish from oxidative damage, thereby preserving the aesthetic and functional properties of the surface. For adhesives, the compound ensures that the adhesive remains effective and stable throughout its intended lifespan.

The compound also finds application in the production of elastomers and rubbers. Here, O,O'-Dioctadecylpentaerythritol bis(phosphite) acts as a processing stabilizer, preventing premature degradation of the material during manufacturing. This role is critical in ensuring that the final rubber products, such as seals and gaskets, perform reliably under varying environmental conditions.

The effectiveness of O,O'-Dioctadecylpentaerythritol bis(phosphite) as an antioxidant and stabilizer has been well-documented in scientific literature. Research has shown that its use can lead to significant improvements in the thermal and oxidative stability of polymers, enhancing their overall performance and extending their useful life.

In summary, O,O'-Dioctadecylpentaerythritol bis(phosphite) is a valuable chemical compound used primarily as an antioxidant in the polymer industry. Its discovery has enabled significant advancements in material science, particularly in improving the durability and longevity of polymers, coatings, and adhesives.

References

2018. The Chemical and Products Database, a resource for exposure-relevant data on chemicals in consumer products. Scientific Data, 5.
DOI: 10.1038/sdata.2018.125