Description

Triisodecyl phosphite (CAS: 25448-25-3) is a high-purity organophosphorus compound with the molecular formula C₃₀H₆₃O₃P, widely utilized as an antioxidant, stabilizer, and chelating agent in polymer and lubricant formulations. This specialty chemical exhibits excellent hydrolytic stability and thermal resistance, making it ideal for high-performance applications in plastics, synthetic rubbers, and synthetic lubricants. Its role as a secondary antioxidant helps to synergize with primary antioxidants, thereby enhancing the longevity and durability of polymeric materials by preventing oxidative degradation. Triisodecyl phosphite is also employed as a metal deactivator, effectively sequestering metal ions that could otherwise catalyze degradation reactions. Available in liquid form with a purity of ≥95%, it is compatible with a broad range of industrial processes and complies with stringent quality standards for research and manufacturing.

Properties

• CAS Number: 25448-25-3
• Complexity: 330
• IUPAC Name: tris(8-methylnonyl) phosphite
• InChI: InChI=1S/C30H63O3P/c1-28(2)22-16-10-7-13-19-25-31-34(32-26-20-14-8-11-17-23-29(3)4)33-27-21-15-9-12-18-24-30(5)6/h28-30H,7-27H2,1-6H3
• InChI Key: QEDNBHNWMHJNAB-UHFFFAOYSA-N
• Exact Mass: 502.45148287
• Molecular Formula: C30H63O3P
• Molecular Weight: 502.8
• SMILES: CC(C)CCCCCCCOP(OCCCCCCCC(C)C)OCCCCCCCC(C)C
• Topological: 27.7
• Monoisotopic Mass: 502.45148287
• Physical Description: Liquid; Dry Powder, Liquid
• Synonyms: Triisodecyl phosphite, 25448-25-3, Isodecyl phosphite, Phosphorous acid, triisodecyl ester, Triisodecyl phosphate, Phosclere T 310, Phosphorous acid, tris(isodecyl) ester, EINECS 246-998-3, DOVERPHOS 6, M01370002Z, EC 246-998-3, J261.093K, PHOSPHOROUS ACID TRI(8-METHYLNONYL) ESTER, DTXSID3027873, Phosphorous acid, tris(isodecyl) ester (8CI), 246-998-3, Phosphorous Acid Triisodecyl Ester, tris(8-methylnonyl) phosphite, 124129-26-6, isodecylphosphite, triisodecylphosphite, UNII-M01370002Z, MFCD00015059, SCHEMBL99874, DTXSID00881235, Triisodecyl Phosphite, >/=95%, AKOS025295004, 1-Nonanol,8-methyl-,1,1′,1”-phosphite, NS00005289, T0420, 1-Nonanol, 8-methyl-, 1,1′,1”-phosphite, Q27283277

Triisodecyl phosphite is primarily used as a stabilizer in polyolefins, PVC, and other polymers to prevent thermal and oxidative degradation during processing and end-use. It acts as a synergist with phenolic antioxidants, enhancing their effectiveness in protecting polymers from chain scission and discoloration. In lubricant formulations, it serves as an anti-wear additive and metal passivator, extending the service life of machinery components. Its chelating properties make it valuable in applications requiring metal ion sequestration, such as adhesives and coatings. Additionally, it finds use in synthetic rubber production to improve aging resistance.

Safety and Hazards

GHS Hazard Statements

• H315 (48.3%): Causes skin irritation [Warning Skin corrosion/irritation]
• H317 (46.6%): May cause an allergic skin reaction [Warning Sensitization, Skin]
• H319 (27.7%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H335 (11.4%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
• H340 (11.7%): May cause genetic defects [Danger Germ cell mutagenicity]
• H360 (11.7%): May damage fertility or the unborn child [Danger Reproductive toxicity]

Precautionary Statements

• P203, P261, P264, P264+P265, P271, P272, P280, P302+P352, P304+P340, P305+P351+P338, P318, P319, P321, P332+P317, P333+P317, P337+P317, P362+P364, P403+P233, P405, and P501

Hazard Classes and Categories

• Skin Irrit. 2 (48.3%)
• Skin Sens. 1 (46.6%)
• Eye Irrit. 2 (27.7%)
• STOT SE 3 (11.4%)
• Muta. 1B (11.7%)
• Repr. 1B (11.7%)

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