Heptamethyltrisiloxane
Heptamethyltrisiloxane

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Understanding the Boiling Point of Heptamethyltrisiloxane

Heptamethyltrisiloxane, a silicone-based compound with the CAS number 1873-88-7, is widely recognized for its unique chemical properties and versatility in industrial applications. One of its most critical physical characteristics is its boiling point, which plays a pivotal role in determining its suitability for specific uses.

Boiling Point and Key Physical Properties

The boiling point of heptamethyltrisiloxane is ​142°C (287.6°F)​​ under standard atmospheric pressure . This relatively high boiling point reflects its stability under moderate thermal conditions, making it ideal for applications requiring thermal resilience. Additional properties include:

  • Density: 0.819 g/mL at 25°C
  • Flash Point: 82°F (27.8°C)
  • Solubility: Miscible with acetone, ethanol, and diethyl ether, but insoluble in water

These characteristics position it as a valuable intermediate in organic synthesis and specialty chemical formulations.


Why Does the Boiling Point Matter?​

The boiling point directly impacts handling, storage, and application methods. For instance:

  1. Industrial Processes: In pesticide or coating additives, heptamethyltrisiloxane’s thermal stability ensures performance under varying conditions .
  2. Safety Considerations: A moderate boiling point reduces risks during transportation and storage, though its flammability (classified as Xi – Irritant) necessitates cautious handling .

Applications Driving Demand

Heptamethyltrisiloxane serves as a foundational material in:

  • Agricultural Adjuvants: Enhances pesticide efficacy by improving leaf surface coverage .
  • Cosmetics: Acts as a sensory enhancer in formulations, improving texture and spreadability .
  • Polymer Synthesis: Facilitates the creation of siloxane-terminated polymers for coatings and adhesives .

Its ability to undergo hydrosilylation reactions further broadens its utility in pharmaceuticals and agrochemicals .


Supplier Insights and Quality Assurance

When sourcing heptamethyltrisiloxane, purity (≥99%) and reliable supply chains are paramount. Leading manufacturers like ​Biyuan Chemical Innovations​ adhere to stringent quality control measures, ensuring products meet global standards (e.g., REACH, TSCA compliance). For bulk orders, suppliers typically offer packaging options ranging from 150 kg drums to IBC containers, balancing cost-efficiency with safety .


Conclusion

Heptamethyltrisiloxane’s boiling point of 142°C underscores its role as a stable, high-performance intermediate. Whether in agricultural formulations or advanced coatings, its properties enable innovative solutions across industries. For businesses prioritizing reliability and technical expertise, partnering with certified suppliers like ​Biyuan​ ensures access to premium-grade materials tailored to demanding applications.

Note: Always consult safety data sheets (SDS) and regulatory guidelines when handling chemicals.

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