Electro Plating, High-Purity Solvents

Propyne Ethoxylate (PME)

Propyne Ethoxylate, also identified by the CAS Registry Number 3973-18-0 and commonly abbreviated as PME, is a specialized organic compound that serves as a critical intermediate in modern industrial chemistry, particularly within the electroplating and surface finishing sectors. Chemically, it is classified as an ethoxylated terminal alkyne, characterized by the presence of a triple bond which provides significant reactive potential for various chemical transformations and surface-active properties. In the specific context of metal plating, Propyne Ethoxylate acts as a highly effective brightener and leveling agent, specifically optimized for use in nickel electroplating baths. Its molecular structure allows it to interact effectively at the electrode-electrolyte interface, ensuring the formation of a uniform, lustrous, and smooth metallic coating on diverse substrates. Beyond its primary role in metal finishing, PME is valued for its stability under typical process conditions and its ability to enhance the overall aesthetic and functional quality of industrial components.

Attributes

Key Features and Benefits

Superior leveling properties ensure smooth metal surface deposition.
Excellent brightness enhancement for high-quality nickel plating finishes.
High thermal stability allows for consistent performance in baths.
Low consumption rates provide significant cost-effectiveness for manufacturers.
Compatible with various surfactants and additives in formulations.
Improves the ductile properties of the resulting metal layer.
Reduces internal stress within the electroplated nickel coatings effectively.
Environmentally stable profile under standard industrial handling conditions today.
Enhanced solubility in aqueous systems facilitates easy bath preparation.
Terminal alkyne functionality permits versatile chemical modification for synthesis. It offers reliable long-term stability for demanding industrial surface treatment workflows operating at scale.

Specifications

Technical Highlights

CAS Number: 3973-18-0; Chemical Formula: C5H8O2; Molecular Weight: 100.12.
Appearance: Clear, colorless to light yellowish liquid substance.
Assay Purity: Typically exceeds 98% for high-grade industrial applications.
Density: Approximately 1.01 g/cm3 at standard room temperature conditions.
Boiling Point: Measured near 190 degrees Celsius at atmospheric pressure.
Refractive Index: Ranges between 1.440 and 1.450 for purity verification.
Solubility: Fully miscible in water and polar organic solvents.
pH Stability: Highly effective across a broad range of acidic baths.
Flash Point: High safety margin with values exceeding 100 degrees Celsius.
Functional Group: Terminal alkyne and ether linkages present in the molecular chain backbone structure.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Primary brightener for decorative and functional nickel electroplating processes.
Key intermediate for synthesizing specialty surfactants and chemical agents.
Levelling agent in acidic copper plating for electronics manufacturing.
Additive in metal cleaning formulations to improve surface wetting.
Intermediate for pharmaceutical synthesis involving alkyne-based chemical building blocks.
Component in high-performance coatings for automotive and aerospace industries.
Used in the production of corrosion inhibitors for oilfield environments.
Laboratory reagent for specialized organic coupling and click chemistry reactions.
Surface treatment agent for improving adhesion in polymer-to-metal bonding applications.
Ingredient in specialized textile finishing agents for enhanced fabric properties across global manufacturing supply chain networks.