Description

Tris(nonylphenyl)phosphite (CAS 3050-88-2) is a high-performance organophosphite antioxidant widely utilized in polymer stabilization and industrial applications. With the molecular formula C₄₅H₆₉O₃P and IUPAC name tris(4-nonylphenyl) phosphite, this compound acts as a highly effective secondary antioxidant, preventing thermal degradation and oxidative chain scission in polymers. It is particularly valued for its compatibility with polyolefins, ABS, PVC, and synthetic rubbers, where it synergizes with phenolic antioxidants to enhance material longevity. Available in liquid form, this phosphite exhibits excellent hydrolytic stability and low volatility, making it ideal for high-temperature processing. Suitable for research, manufacturing, and formulation of stabilized polymer systems.

Properties

• CAS Number: 3050-88-2
• Complexity: 613
• IUPAC Name: tris(4-nonylphenyl) phosphite
• InChI: InChI=1S/C45H69O3P/c1-4-7-10-13-16-19-22-25-40-28-34-43(35-29-40)46-49(47-44-36-30-41(31-37-44)26-23-20-17-14-11-8-5-2)48-45-38-32-42(33-39-45)27-24-21-18-15-12-9-6-3/h28-39H,4-27H2,1-3H3
• InChI Key: MGMXGCZJYUCMGY-UHFFFAOYSA-N
• LogP: log Kow = 14 , HPLC Method)
• Exact Mass: 688.49843306
• Molecular Formula: C45H69O3P
• Molecular Weight: 689.0
• SMILES: CCCCCCCCCC1=CC=C(C=C1)OP(OC2=CC=C(C=C2)CCCCCCCCC)OC3=CC=C(C=C3)CCCCCCCCC
• Topological: 27.7
• Monoisotopic Mass: 688.49843306
• Physical Description: Dry Powder, Liquid
• Color/Form: Clear liquid
• Boiling Point: >300 °C, OECD Guideline 103 , has an onset of degradation at 322 °C under nitrogen
• Melting Point: 6 °C , OECD Guideline 102
• Flash Point: 207 °C – closed cup
• Solubility: In water, <0.6 mg/L at 24 °C, pH 7 )
• Density: 0.98 g/cu cm at 20 °C
• Vapor Pressure: 0.058 Pa at 25 °C , extrapolated from measured data at higher temperatures
• Stability/Shelf Life: Chemical stability: Stable under recommended storage conditions.
• Autoignition Temperature: 440 °C
• Viscosity: 6000 mPa.s at 25 °C )
• Synonyms: 3050-88-2, Phenol, 4-nonyl-, phosphite (3:1), Antioxidant TNP, Irgafos TNPP, Naugard TNPP, Phenol, nonyl-, phosphite (3:1), SUMILIZER TNP, p-Nonylphenol, phosphite (3:1), DOVERPHOS 4, Tris(p-nonylphenyl) phosphite, E423N4NW2Z, DTXSID60872866, Phenol, nonyl-, 1,1′,1”-phosphite, Tris[p-nonylphenyl] phosphite, Trisnonylphenylphosphit, DTXCID707903, Phenol,nonyl-,phosphite (3:1), TRIS(NONYLPHENYL)PHOSPHITE [INCI], 247-759-6, 608-492-4, tris(4-nonylphenyl) phosphite, tris(4-nonylphenyl)phosphite, SCHEMBL77176, tris-(p-nonylphenyl) phosphite, C45H69O3P, MGMXGCZJYUCMGY-UHFFFAOYSA-N, DAA05088, Phenol, 4-anonyl-a, phosphite (3:1), CS-0160274, NS00002998, D97379, Tris(nonylphenyl) phosphite; TNNP; Tris(nonylphenol)phosphite

Application

Tris(nonylphenyl)phosphite is primarily used as a secondary antioxidant in polymer processing, where it decomposes hydroperoxides to prevent oxidative degradation. It is commonly applied in polyolefins, styrenics, and elastomers to improve thermal stability during extrusion and molding. The compound also finds use in adhesives and coatings to maintain performance under prolonged heat exposure. Its compatibility with phenolic antioxidants makes it a key component in synergistic stabilization systems.

Safety and Hazards

GHS Hazard Statements

• H315: Causes skin irritation [Warning Skin corrosion/irritation]
• H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
• H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
• H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]
• H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
• H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P203, P261, P264, P264+P265, P272, P273, P280, P302+P352, P305+P354+P338, P317, P318, P321, P332+P317, P333+P317, P362+P364, P391, P405, and P501

Hazard Classes and Categories

• Skin Irrit. 2 (15.9%)
• Skin Sens. 1 (80.9%)
• Aquatic Acute 1 (86.5%)
• Aquatic Chronic 1 (80.1%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.