Di-octyl Phthalate (DOP)

Di-octyl Phthalate (DOP) is an ester of phthalic acid commonly used as a plasticizer to impart flexibility and durability to rigid polymers. It is a clear to pale yellow oily liquid with the chemical formula C24H38O4 and CAS number 117-81-7. This compound is predominantly supplied in liquid form and is typically used at concentrations ranging from 10% to 60% by weight during the compounding of flexible polyvinyl chloride (PVC). Buyers should be aware that DOP is incompatible with strong oxidizing agents and must be handled with appropriate protective measures to avoid degradation or hazardous reactions. Finstar supplies DOP in industrial-grade drums and intermediate bulk containers (IBCs), ensuring suitability for various production scales. Storage recommendations include keeping it in a cool, dry, and well-ventilated space away from sources of heat or ignition to maintain chemical stability. Effective usage hinges on maintaining controlled processing temperatures below 60°C during mixing to prevent volatilization and preserve plasticizing efficiency.

DOP addresses the challenge of enhancing flexibility in otherwise rigid polymers, particularly PVC, without compromising mechanical strength or workability. By integrating DOP as a plasticizer, manufacturers achieve improved softness, elongation, and resistance to cracking in final products such as cables, flooring, and automotive interiors. Moreover, DOP's chemical stability reduces plasticizer migration and evaporation over time, thereby extending the service life of plastic materials exposed to environmental stressors. This consistency in performance is critical for product reliability where material flexibility and durability are essential.