Tris(4-nonylphenyl) phosphite

Tris(4-nonylphenyl) phosphite is an organophosphorus compound with the molecular formula C45H69O3P and CAS number 26523-78-4. This chemical substance has a molecular weight of 689 g/mol and belongs to the phosphite ester family. It is classified as a skin sensitizer and poses acute and chronic hazards to aquatic environments, requiring careful handling and environmental protection measures during use and disposal.

Tris(4-nonylphenyl) phosphite is typically a viscous liquid or solid at room temperature due to its high molecular weight of 689 g/mol. As an organophosphorus compound with long nonylphenyl chains, it exhibits low water solubility but good solubility in organic solvents. The compound's physical state and appearance can vary depending on temperature and purity, with its large molecular structure contributing to its viscous nature.

Tris(4-nonylphenyl) phosphite is primarily used as an antioxidant and stabilizer in polymer processing and plastic manufacturing. It serves as a secondary antioxidant, protecting materials from oxidative degradation during processing and extending their service life. The compound is particularly valuable in applications requiring thermal stability and protection against polymer chain scission, making it essential in various industrial polymer formulations and specialty chemical applications.

Tris(4-nonylphenyl) phosphite requires careful handling due to its skin sensitization properties (Skin Sens. 1). Workers must wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing to prevent skin contact. Ensure adequate ventilation in work areas and avoid generating dust or vapors. Follow proper hygiene practices, wash hands thoroughly after handling, and never eat, drink, or smoke in work areas.

Tris(4-nonylphenyl) phosphite should be stored in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Keep containers tightly closed and protected from moisture to prevent degradation. Store away from oxidizing agents and incompatible materials. Maintain storage temperatures according to supplier specifications and ensure proper labeling with hazard warnings. Implement appropriate spill containment measures to protect the environment from potential contamination.

Immediate action is required if contact with tris(4-nonylphenyl) phosphite occurs due to its skin sensitizing properties. For skin contact, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. If eye contact occurs, rinse immediately with clean water for 15 minutes. Seek medical attention if irritation persists or if sensitization symptoms develop. Do not induce vomiting if ingested.

Tris(4-nonylphenyl) phosphite must be disposed of as hazardous waste due to its aquatic toxicity classification (Aquatic Acute 1; Aquatic Chronic 1). Contact licensed waste disposal contractors specialized in chemical waste management. Never discharge into sewers, waterways, or soil. Small quantities should be absorbed with inert material and placed in appropriate containers. Follow local and national environmental regulations, and maintain proper documentation for waste disposal activities.

Tris(4-nonylphenyl) phosphite is classified as ADR Class 9 (Miscellaneous dangerous goods), Packing Group III for transportation purposes. This classification indicates it requires proper packaging, labeling, and documentation during transport. Use UN-approved packaging and ensure proper hazard labels are affixed. Transport vehicles must carry appropriate emergency equipment and documentation. Follow ADR regulations for loading, segregation, and route restrictions to ensure safe transportation.

Tris(4-nonylphenyl) phosphite is subject to REACH regulation as a chemical substance manufactured or imported in the EU. It is classified under CLP regulation with harmonized hazard classifications including skin sensitization and aquatic toxicity. While not currently listed as an SVHC (Substance of Very High Concern), users must comply with safety data sheet requirements, classification and labeling obligations, and environmental protection measures under European chemical legislation.

Tris(4-nonylphenyl) phosphite is available through OYSI, a specialized European distributor of technical chemicals and industrial raw materials. OYSI provides reliable supply chain solutions across Europe with proper documentation, safety data sheets, and regulatory compliance support. As a professional chemical distributor, OYSI ensures product quality, proper packaging, and adherence to transportation regulations for safe delivery to industrial customers throughout European markets.