Description

Phenyltris(trimethylsiloxy)silane (CAS No. 195868-36-1) is a high-purity organosilicon compound with the molecular formula C₁₅H₃₂O₃Si₄. Also known as Phenyl trimethicone, this versatile siloxane derivative features a phenyl group bonded to a tris(trimethylsiloxy)silane backbone, offering unique chemical and thermal stability. Its IUPAC name, trimethyl-[phenyl-bis(trimethylsilyloxy)silyl]oxysilane, reflects its precise molecular structure. This compound is widely utilized in advanced material science, silicone polymer modification, and specialty coatings due to its hydrophobic properties and compatibility with organic matrices. Available in research-grade purity, it is ideal for applications requiring precise control over surface energy and rheological behavior. Packaged under inert conditions to ensure stability and longevity.

Properties

• CAS Number: 195868-36-1
• Complexity: 308
• IUPAC Name: trimethyl-[phenyl-bis(trimethylsilyloxy)silyl]oxy-silane
• InChI: InChI=1S/C15H32O3Si4/c1-19(2,3)16-22(17-20(4,5)6,18-21(7,8)9)15-13-11-10-12-14-15/h10-14H,1-9H3
• InChI Key: LINXHFKHZLOLEI-UHFFFAOYSA-N
• Exact Mass: 372.14285102
• Molecular Formula: C15H32O3Si4
• Molecular Weight: 372.75
• SMILES: C[Si](C)(C)O[Si](C1=CC=CC=C1)(O[Si](C)(C)C)O[Si](C)(C)C
• Topological: 27.7
• Monoisotopic Mass: 372.14285102
• Physical Description: Liquid
• Synonyms: 2116-84-9, Phenyl trimethicone, Phenyltris(trimethylsiloxy)silane, 1,1,1,5,5,5-hexamethyl-3-phenyl-3-((trimethylsilyl)oxy)trisiloxane, Tris(trimethylsiloxy)phenylsilane, trimethyl-[phenyl-bis(trimethylsilyloxy)silyl]oxysilane, MFCD00053665, S3QI0ZXT5X, 195868-36-1, 1,1,1,5,5,5-Hexamethyl-3-phenyl-3-(trimethylsilyloxy)trisiloxane, Phenyltris(trimethylsiloxyl)silane, Trisiloxane, 1,1,1,5,5,5-hexamethyl-3-phenyl-3-((trimethylsilyl)oxy)-, C15H32O3Si4, 1,1,1,5,5,5-hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane, Dow Corning 556, Silicone DC 556, Phenyl trimethyl siloxane, UNII-S3QI0ZXT5X, SCHEMBL339880, DTXSID6051857, phenyl tris(trimethylsiloxy)silane, LINXHFKHZLOLEI-UHFFFAOYSA-N, Phenyltris(trimethylsilyloxy)silane, EINECS 218-320-6, DC 556, AKOS025310938, s21150, AS-15561, SY057388, DB-045505, M3T(Ph): tris(trimethylsiloxy)phenylsilane, CS-0186280, H1460, NS00044920, D91036, Q27288541, 1,1,5,5,5-Hexamethyl-3-phenyl-3-((trimethylsilyl)oxy)trisiloxane

Application

Phenyltris(trimethylsiloxy)silane is primarily employed as a modifying agent in silicone elastomers and resins, enhancing their refractive index and thermal resistance. It serves as a key intermediate in the synthesis of phenyl-functionalized siloxanes for cosmetics, lubricants, and release coatings. In material science, it is used to tailor surface properties in hydrophobic coatings and adhesives. Its compatibility with organic polymers makes it valuable for hybrid material development.

Safety and Hazards

GHS Hazard Statements

• H315 (43.3%): Causes skin irritation [Warning Skin corrosion/irritation]
• H319 (43.6%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H330 (45.3%): Fatal if inhaled [Danger Acute toxicity, inhalation]
• H335 (43%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

Precautionary Statements

• P260, P261, P264, P264+P265, P271, P280, P284, P302+P352, P304+P340, P305+P351+P338, P316, P319, P320, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501

Hazard Classes and Categories

• Skin Irrit. 2 (43.3%)
• Eye Irrit. 2 (43.6%)
• Acute Tox. 2 (45.3%)
• STOT SE 3 (43%)

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