Description

Phenyltris(trimethylsiloxy)silane (CAS No. 2116-84-9) is a high-purity organosilicon compound with the molecular formula C₁₅H₃₂O₃Si₄, widely used in advanced material science and specialty chemical applications. This compound, also known by its IUPAC name trimethyl-[phenyl-bis(trimethylsilyloxy)silyl]oxysilane, features a unique phenyl group bonded to a tris(trimethylsiloxy)silane backbone, offering exceptional thermal stability, hydrophobicity, and compatibility with organic matrices. It is supplied as a clear, colorless liquid with a low volatility, making it ideal for formulations requiring precise control over surface properties and reactivity. Suitable for research and industrial applications, this product is rigorously tested for consistency, ensuring optimal performance in silicone modification, surface coatings, and polymer synthesis. Store in a cool, dry place under inert conditions to maintain its integrity.

Properties

• CAS Number: 2116-84-9
• 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-based polymers to enhance their refractive index, thermal stability, and adhesion properties. It serves as a key intermediate in the synthesis of specialty silicones for cosmetics, where it imparts a silky, non-greasy feel. In material science, it is used to create hydrophobic coatings for optical and electronic components. Additionally, its compatibility with organic solvents makes it valuable for formulating high-performance lubricants and release agents.

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.