Description

Octadecanethiol CAS NO 2885-00-9 is a long-chain alkanethiol characterized by an 18-carbon hydrophobic tail and a reactive thiol (-SH) head group. This unique structure makes it an essential surface-modifying agent and a versatile building block in advanced material synthesis. It is a critical raw material for researchers and manufacturers in the nanotechnology, polymer, and specialty coatings industries seeking to impart specific surface properties.

Application

• Self-Assembled Monolayer (SAM) Formation: Used to create highly ordered, hydrophobic monolayers on gold, silver, and other metal surfaces for corrosion inhibition, biosensor platforms, and microelectromechanical systems (MEMS).
• Polymer Modification & Chain Transfer Agent: Acts as a chain-transfer agent in radical polymerizations to control molecular weight and as a modifier to introduce thiol end-groups for further functionalization.
• Nanoparticle Capping & Stabilization: Essential for functionalizing and stabilizing metal nanoparticles (e.g., gold nanorods, quantum dots) to prevent aggregation and tailor surface chemistry for specific applications.
• Lubricant & Fuel Additive: Serves as an extreme-pressure additive and anti-wear agent in lubricating oils and greases, and as an odorant or stabilizer in hydrocarbon fuels.
• Surface Hydrophobization: Imparts water-repellent characteristics to textiles, papers, and various substrates through chemical grafting.
• Adhesion Promotion: Functions as a coupling agent to improve the adhesion between organic polymers and inorganic materials like metals or glass.

Basic Information

Product Name	Octadecanethiol
CAS No.	2885-00-9
Molecular Formula	C18H38S
Molecular Weight	286.56 g/mol
Synonyms	1-Octadecanethiol; n-Octadecyl mercaptan; Stearyl mercaptan; Octadecylthiol; Thiooctadecyl alcohol; C18 thiol; n-Octadecanethiol; Long-chain alkanethiol
EINECS	220-744-1

Quality Control

Our Octadecanethiol is produced under stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including chromatographic purity analysis and identity confirmation, to ensure it meets precise customer specifications and consistent performance. Certificates of Analysis (COA) documenting purity, assay, and key physical properties are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C to minimize oxidation and prolong shelf life. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline solid or flakes
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Melting Point	28 - 32 °C
Heavy Metals (as Pb)	≤ 10 ppm

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