Description

5-Methyloctadecane is a high-purity branched alkane, also known as an isoparaffin, with the CAS registry number 25117-35-5. This compound is valued for its chemical stability, low reactivity, and hydrophobic properties, making it a versatile intermediate and performance additive in specialized industrial formulations. It is primarily sought by manufacturers in the lubricant, polymer, and specialty chemical sectors for applications requiring consistent molecular structure and reliable performance.

Application

• Lubricant and Grease Formulation: Acts as a high-performance base oil or viscosity modifier in synthetic lubricants and specialty greases, offering excellent thermal and oxidative stability.
• Polymer and Plasticizer Industry: Serves as a plasticizer or processing aid in polymer synthesis and modification, helping to improve flexibility and processing characteristics.
• Chemical Intermediate: Used in organic synthesis as a building block for producing more complex surfactants, corrosion inhibitors, and other functional chemicals.
• Reference Standard and Calibration: Employed in analytical laboratories as a certified reference material (CRM) for gas chromatography (GC) and mass spectrometry (MS) due to its defined structure.
• Specialty Solvents and Carrier Fluids: Functions as an inert, non-polar solvent or carrier fluid in high-value applications such as electronics cleaning or heat transfer fluids.
• Cosmetic and Personal Care: Used as an emollient or skin-conditioning agent in high-end cosmetic formulations where purity and skin feel are critical.

Basic Information

Product Name	5-Methyloctadecane
CAS No.	25117-35-5
Molecular Formula	C₁₉H₄₀
Molecular Weight	268.52 g/mol
Synonyms	5-Methyloctadecane; Iso-Nonadecane; 5-Methyl-n-octadecane; 5-Methyloctadecane (principal name); 25117-35-5; NSC 74139; Octadecane, 5-methyl-; Isoalkane C19
EINECS	Contact for details

Quality Control

Our 5-Methyloctadecane is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including gas chromatography (GC) for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and impurity profiles is provided with each shipment to guarantee traceability and quality assurance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, heat, and open flames.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Refractive Index (20°C)	Contact for details
Density (20°C)	Contact for details

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