Description

Poly-p-Xylylene is a high-performance polymer precursor, specifically the dimer form of [2.2]paracyclophane, which is vapor-deposited to form ultra-thin, conformal parylene coatings. This compound matters for its critical role in creating parylene N films, which offer exceptional dielectric strength, chemical inertness, and biocompatibility. Industries requiring reliable, pinhole-free protective barriers, such as microelectronics, medical device manufacturing, and advanced aerospace components, need this high-purity chemical intermediate.

Application

• Conformal Coating for Electronics: Used as the vapor-phase precursor for Parylene N coatings to protect printed circuit boards (PCBs), sensors, and MEMS devices from moisture, dust, and corrosive environments.
• Medical Device Encapsulation: Essential for depositing biocompatible, USP Class VI compliant parylene coatings on implantable devices, surgical tools, and diagnostic components to ensure patient safety and device longevity.
• Aerospace & Defense Components: Applied to protect sensitive avionics, connectors, and hardware in extreme conditions due to its excellent thermal stability and dielectric properties.
• Advanced Material Research: Serves as a key monomer in the synthesis of specialized polymers and nano-coatings for R&D in barrier films and functional surfaces.
• Hybrid Microelectronics: Provides a uniform insulating layer in hybrid circuits, chip-on-board assemblies, and other high-density electronic packages.
• Cultural Heritage Preservation: Utilized in the thin-film encapsulation of delicate artifacts and historical documents to protect against environmental degradation.

Basic Information

Product Name	Poly-p-Xylylene
CAS No.	25722-33-2
Molecular Formula	C16H16
Molecular Weight	208.30 g/mol
Synonyms	Dimer of p-Xylylene; [2.2]Paracyclophane; Parylene N Dimer; Di-p-xylylene; DPX-N; Parylene Precursor N; Cyclophane, 4,12-dihydro-; Parylene dimer
EINECS	Contact for details

Quality Control

Our Poly-p-Xylylene is manufactured under stringent conditions to meet the high-purity demands of vapor deposition processes. Each batch is subjected to rigorous analytical testing, including chromatography and spectroscopy, to ensure consistency and performance. A Certificate of Analysis (COA) detailing purity, melting point, and key impurity profiles is provided with every shipment to 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 a controlled room temperature (15-25°C). The product is moisture-sensitive and should be kept under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent oxidation and maintain purity. Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 99.0%
Melting Point	285 - 295 °C
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%
Volatile Matter	≤ 0.5%

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