Description

Diphenyl Isodecyl Phosphite (CAS No. 26544-23-0) is a high-purity organophosphorus compound with the molecular formula C₂₂H₃₁O₃P. This specialty chemical, also known as 8-methylnonyl diphenyl phosphite, is widely recognized for its role as a stabilizer and antioxidant in polymer formulations. Its unique structure, featuring a phenyl and isodecyl group bonded to a phosphite moiety, enhances its compatibility with various polymeric matrices, including PVC, polyolefins, and elastomers. This product is supplied as a clear, colorless to pale yellow liquid with a mild characteristic odor, ensuring ease of handling and integration into industrial processes. Suitable for research and manufacturing applications, it is rigorously tested for consistency, purity, and performance to meet the stringent demands of material science and chemical engineering.

Properties

• CAS Number: 26544-23-0
• Complexity: 305
• IUPAC Name: 8-methylnonyl diphenyl phosphite
• InChI: InChI=1S/C22H31O3P/c1-20(2)14-8-4-3-5-13-19-23-26(24-21-15-9-6-10-16-21)25-22-17-11-7-12-18-22/h6-7,9-12,15-18,20H,3-5,8,13-14,19H2,1-2H3
• InChI Key: ADRNSOYXKABLGT-UHFFFAOYSA-N
• Exact Mass: 374.20108184
• Molecular Formula: C22H31O3P
• Molecular Weight: 374.5
• SMILES: CC(C)CCCCCCCOP(OC1=CC=CC=C1)OC2=CC=CC=C2
• Topological: 27.7
• Monoisotopic Mass: 374.20108184
• Physical Description: Liquid; Dry Powder, Liquid
• Synonyms: Isodecyl diphenyl phosphite, 26544-23-0, Weston DPDP, Phosphorous acid, isodecyl diphenyl ester, Diphenyl isodecyl phosphite, Chelex MD, Mark 135A, Phoselere T 26, Isodecyl alcohol, diphenyl phosphite, EINECS 247-777-4, 2BQ9I1429A, DOVERPHOS 8, PHOSCLERE T 26, Isodecyl phenyl phosphite ((C10H21O)(PhO)2P), ADK STAB 135A, EC 247-777-4, ISODECYL DIPHENYL ESTER OF PHOSPHOROUS ACID, PHOSPHOROUS ACID, 8-METHYLNONYL DIPHENYL ESTER, DTXSID3027904, 247-777-4, 8-methylnonyl diphenyl phosphite, Diphenylisodecyl phosphite, UNII-2BQ9I1429A, SCHEMBL78491, 8-methylnonyldiphenylphosphite, DTXSID20883110, ADRNSOYXKABLGT-UHFFFAOYSA-N, Phosphorous acid,isooctyl diphenyl ester, NS00010046, Q27254528, 4169-11-3

Application

Diphenyl Isodecyl Phosphite is primarily employed as a secondary antioxidant and heat stabilizer in polymer systems, where it effectively scavenges free radicals and decomposes hydroperoxides to prolong material lifespan. It is commonly used in conjunction with primary antioxidants to enhance the thermal and oxidative stability of polyolefins, PVC, and synthetic rubbers. Additionally, this phosphite ester finds utility in lubricant formulations to prevent viscosity breakdown and deposit formation under high-temperature conditions. Its compatibility with a broad range of additives makes it a versatile choice for advanced material development.

Safety and Hazards

GHS Hazard Statements

• H317: May cause an allergic skin reaction [Warning Sensitization, Skin]

Precautionary Statements

• P261, P272, P280, P302+P352, P321, P333+P317, P362+P364, and P501

Hazard Classes and Categories

• Skin Sens. 1 (92.9%)
• STOT RE 2 (72.7%)
• Aquatic Chronic 2 (82.3%)

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