1.Parylene D Dimer Basic Information

Chemical Identification

Chemical Name: Tetrachloro-p-xylene dimer

Alternative Name: Tetrachloro-tricyclo[8.2.2.2⁴,⁷]hexadecene-4,6,10,12,13,15-hexaene

Molecular Formula: C₁₆H₁₂Cl₄

Molecular Weight: 346.08

CAS Number: 30501-29-2

2. Physical & Chemical Properties

3. Parylene D Dimer Features & Advantages

• Raw Material Characteristics

White crystalline powder or white granules

High purity (≥99%) with stable batch-to-batch consistency

Stable melting point range (130–140 °C), suitable for controlled sublimation processes

• Film Formation Performance

Deposited via Chemical Vapor Deposition (CVD) process

Uniform, dense, and pinhole-free coating

Excellent conformal coverage on deep cavities and complex geometries

• Electrical Properties

Excellent electrical insulation performance

High dielectric strength

Low dielectric constant, suitable for precision electronic component protection

• Environmental Resistance

Outstanding moisture and humidity resistance

Good chemical resistance

Enhanced thermal resistance compared to some other Parylene grades

• Reliability Advantages

Excellent long-term stability

Maintains protective performance under harsh environmental conditions

Suitable for high-reliability industries and applications

4. Parylene D Typical Applications

Parylene D is a high-performance parylene coating material widely used in the electronics, medical, and aerospace industries. It provides excellent moisture resistance, electrical insulation, and long-term protective performance.