Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer known for its exceptional chemical resistance, high melting point, and non-stick properties. Its chemical formula is (C₂F₄)ₙ, representing a linear chain of carbon atoms fully saturated with fluorine atoms. The CAS (Chemical Abstracts Service) registry number for PTFE is 9002-84-0, a unique identifier used in chemical databases and regulatory documentation. PTFE's inertness and thermal stability make it valuable for applications ranging from non-stick coatings to industrial seals and custom ptfe parts.
Key Points Explained:
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Chemical Formula of PTFE
- Represented as (C₂F₄)ₙ, PTFE consists of repeating units of two carbon atoms bonded to four fluorine atoms.
- The "n" denotes polymerization, indicating a long-chain molecular structure.
- This fully fluorinated backbone grants PTFE its signature properties: chemical inertness, low friction, and thermal stability (melting point ~327°C).
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CAS Number (9002-84-0)
- A unique numeric identifier assigned by the Chemical Abstracts Service to standardize chemical nomenclature.
- Critical for:
- Regulatory compliance (e.g., safety data sheets).
- Procurement and inventory management.
- Academic/industrial research referencing.
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Material Properties
- Density: 2,200 kg/m³.
- Thermal Stability: Withstands temperatures up to 260°C (500°F) continuously.
- Chemical Resistance: Inert to most solvents, acids, and bases—except molten alkali metals or aggressive fluorinating agents (e.g., ClF₃).
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Applications
- Industrial: Seals, gaskets, and custom ptfe parts for corrosive environments.
- Consumer: Non-stick cookware coatings.
- Medical: Biocompatible components like catheters.
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Handling Considerations
- While PTFE is stable, machining or heating above 400°C can release toxic fumes (e.g., hydrogen fluoride). Proper ventilation is essential during fabrication.
For purchasers, verifying the CAS number ensures material authenticity, while the chemical formula underscores PTFE’s suitability for demanding applications. Its versatility makes it indispensable in sectors prioritizing durability and chemical resistance.
Summary Table:
| Property | Value/Description |
|---|---|
| Chemical Formula | (C₂F₄)ₙ |
| CAS Number | 9002-84-0 |
| Density | 2,200 kg/m³ |
| Thermal Stability | Up to 260°C (500°F) continuously |
| Key Applications | Seals, gaskets, medical devices, coatings |
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