Diisodecyl Phenyl Phosphite – CAS No. 25550-98-5
Diisodecyl Phenyl Phosphite, with the chemical formula C₂₆H₄₇O₃P and CAS Number 25550-98-5, is a high-molecular-weight organophosphite ester serving as an effective secondary antioxidant, thermal stabilizer, and metal deactivator in polymer processing and rubber compounding.
| Technical Data Sheet | TDS | |
| Phenyl Diisodecyl Phosphite | ||
| PDDP=CH8011 | ||
| Product Specification | ||
| Product Name | Phenyl Diisodecyl Phosphite | |
| CAS No. | 25550-98-5 | |
| Molecular Weight | 438 | |
| Quality Index | ||
| Appearance | Colorless and transparent liquid | |
| Chromaticity (Pt-Co) | ≤50 | |
| Density (25℃, g/cm3) | 0.942-0.952 | |
| Refractive Index (η25) | 1.4770- 1.4820 | |
| Packing Method | 180KG metal pail | |
| Application Note | ||
| This product is a chelating agent and stabilizer in PVC and synthetic resin products. In addition to its excellent color inhibition, this product can also increase antioxidant properties and light stability. | ||
Applications-Diisodecyl pheoyl phosphite
Polymer and Rubber Stabilization
- PVC Formulations: Incorporated at 0.2-0.8 phr in rigid and flexible PVC for pipes, profiles, and films, preventing thermal degradation and maintaining clarity during high-shear extrusion.
- Polyolefin Blends: Used at 0.1-0.5% in PP and PE compounds for automotive parts and packaging, enhancing resistance to copper-catalyzed oxidation in wiring and films.
Industrial Compounds
- Synthetic Rubbers: Stabilizer at 0.3-1.0 phr in EPDM and NBR for seals and hoses, improving aging resistance and surface smoothness in vulcanization.
- Lubricants and Coatings: Anti-oxidant additive at 0.5-2.0% in industrial oils and alkyd paints, extending service life and color stability.
Why Choose Our Diisodecyl Phenyl Phosphite?
Our Diisodecyl Phenyl Phosphite is highly refined to acid value <0.05 mg KOH/g and color <50 APHA, with free phenol <0.1% for optimal performance and minimal residues. Compounders report 20-30% longer color stability in recycled PVC and reduced additive volatility. Available in technical and food-contact grades, packaged in 200kg drums, 1000kg IBCs, or bulk tankers, with customizable phosphorus content and certifications including REACH, TSCA, and EU 10/2011.
Frequently Asked Questions (FAQs)-Diisodecyl pheoyl phosphite
What is Diisodecyl Phenyl Phosphite?
Diisodecyl Phenyl Phosphite is an alkyl diaryl phosphite with formula C₂₆H₄₇O₃P and CAS 25550-98-5, functioning as a secondary antioxidant. It’s a hydrolytically stable liquid that protects polymers from oxidation and metal-induced degradation during processing.
How is Diisodecyl Phenyl Phosphite used in PVC processing?
Dose at 0.4-0.6 phr during melt compounding with Ca-Zn or organotin stabilizers; it activates under heat to decompose peroxides, ensuring defect-free extrudates with excellent initial whiteness.
Is Diisodecyl Phenyl Phosphite suitable for food-contact plastics?
Yes, it’s compliant with FDA 21 CFR 178.2010 for use up to 0.5% in PVC, demonstrating low migration in fatty and aqueous simulants for safe packaging applications.
What is the shelf life of Diisodecyl Phenyl Phosphite?
Stored in nitrogen-purged containers at <30°C, it maintains stability for 24-36 months, with high resistance to hydrolysis and no significant acid buildup over time.
Can Diisodecyl Phenyl Phosphite be combined with other stabilizers?
It pairs synergistically with Irganox 1076 or BHT at 1:3 ratios for full protection but test with sulfur accelerators in rubbers to avoid phosphite conversion.
Does Diisodecyl Phenyl Phosphite affect melt flow?
At recommended levels, it improves processability by 5-10% through metal deactivation, reducing viscosity buildup without compromising final mechanical properties.
What packaging options are available for Diisodecyl Phenyl Phosphite?
We provide 200kg galvanized drums, 1000kg composite IBCs, and 20MT isotanks, all equipped with inert gas protection and labeled for UN 3082 hazardous transport.
For formulation advice, performance data, or scalable supply, our stabilization experts are here to help.
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