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 compound 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 aquatic toxicity risks, requiring careful handling and environmental protection measures during use.

Tris(4-nonylphenyl) phosphite is a complex organic phosphite ester with a high molecular weight of 689 g/mol. As a phosphite compound, it typically exists as a liquid or viscous material at room temperature. The compound contains three nonylphenyl groups attached to a central phosphite structure, giving it significant hydrophobic characteristics and limited water solubility due to its large organic substituents.

Tris(4-nonylphenyl) phosphite is primarily used as an antioxidant and stabilizer in polymer processing and plastic manufacturing. It serves as a secondary antioxidant that works synergistically with primary antioxidants to prevent polymer degradation during processing and end-use. The compound is particularly effective in protecting polymers from thermal and oxidative degradation, extending the service life of plastic products and maintaining their mechanical properties.

Tris(4-nonylphenyl) phosphite must be handled with appropriate personal protective equipment due to its skin sensitization properties. Wear chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Ensure adequate ventilation in work areas and avoid generating dust or vapors. The compound requires warning labeling with GHS07 and GHS09 pictograms, indicating health and environmental hazards.

Tris(4-nonylphenyl) phosphite should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Keep containers away from incompatible materials such as strong oxidizing agents and acids. Store in original packaging with proper hazard labeling intact. Maintain storage temperatures according to supplier specifications to prevent degradation and ensure product stability over time.

Tris(4-nonylphenyl) phosphite contact requires immediate first aid due to its skin sensitization properties. In case of skin contact, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. For eye contact, flush immediately with clean water for 15 minutes. If irritation develops or persists, seek medical attention promptly and provide the safety data sheet to medical personnel.

Tris(4-nonylphenyl) phosphite must be disposed of as hazardous waste due to its environmental classification as aquatic acute and chronic toxic. Do not discharge to sewers, waterways, or soil. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Follow local and national environmental regulations for hazardous chemical waste. Contaminated packaging should also be treated as hazardous waste and disposed of accordingly.

Tris(4-nonylphenyl) phosphite is classified as ADR Class 9 (miscellaneous dangerous goods), Packing Group III for transportation purposes. This classification indicates it presents a relatively lower degree of danger during transport but still requires proper packaging, labeling, and documentation. Shipments must comply with dangerous goods regulations, including appropriate packaging specifications, hazard labels, and transport documentation according to ADR requirements.

Tris(4-nonylphenyl) phosphite is subject to REACH regulation in Europe and must be registered for commercial use. Under CLP regulation, it requires classification and labeling as Skin Sens. 1, Aquatic Acute 1, and Aquatic Chronic 1 with warning signal word. The substance is not currently listed as SVHC (Substance of Very High Concern), but its environmental toxicity requires compliance with environmental protection regulations and proper risk management measures.

Tris(4-nonylphenyl) phosphite is available through OYSI, a specialized European distributor of technical chemicals and industrial raw materials. OYSI provides this phosphite antioxidant to polymer manufacturers, plastic processors, and other industrial users across Europe. As a professional chemical distributor, OYSI ensures proper handling, documentation, and regulatory compliance for hazardous chemicals like tris(4-nonylphenyl) phosphite throughout the European market.