Description

n-Octylpentamethyldisiloxane is a high-purity organosilicon compound, specifically a linear disiloxane functionalized with a long alkyl chain. This unique structure provides a combination of excellent hydrophobicity, thermal stability, and low surface tension, making it a valuable intermediate and functional additive. It is primarily utilized in the synthesis of advanced silicone polymers and as a surface-modifying agent. Key industries that rely on this specialty chemical include personal care, coatings, and advanced material manufacturing.

Application

• Silicone Intermediate: A key building block for synthesizing custom silicone oils, resins, and elastomers with tailored properties.
• Surface Modification Agent: Imparts water repellency and release properties to textiles, paper, and inorganic fillers.
• Personal Care Formulations: Acts as an emollient and conditioning agent in hair care and skincare products for a smooth, non-greasy feel.
• Lubricant & Release Agent: Used in specialty lubricants and as a mold release agent in plastic and rubber processing.
• Coating Additive: Enhances slip, mar resistance, and water repellency in industrial and protective coatings.
• Adhesive & Sealant Modifier: Modifies rheology and improves compatibility in silicone-based adhesive and sealant systems.

Basic Information

Product Name	n-Octylpentamethyldisiloxane
CAS No.	180006-15-9
Molecular Formula	C₁₃H₃₂O Si₂
Molecular Weight	260.57 g/mol
Synonyms	1,1,1,3,3-Pentamethyl-3-octyldisiloxane; Octylpentamethyldisiloxane; Disiloxane, 1,1,1,3,3-pentamethyl-3-octyl-; 3-Octyl-1,1,1,3,3-pentamethyldisiloxane; n-Octyl-PMDS; Linear disiloxane with octyl group
EINECS	Contact for details

Quality Control

Our n-Octylpentamethyldisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC and NMR, to ensure high chemical purity and consistency. We provide comprehensive Certificates of Analysis (COA) with every shipment to guarantee compliance with your specifications and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and bases. For long-term storage, consider under an inert atmosphere such as nitrogen to maintain optimal purity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0%
Refractive Index (n20/D)	1.415 - 1.420
Density (25°C)	0.82 - 0.86 g/mL

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.