What is the melting point of heptamethyltrisiloxane? - heptamethyltrisiloxane factory&supplier

Understanding the Melting Point of Heptamethyltrisiloxane​

Heptamethyltrisiloxane (CAS No. 1873-88-7) is a critical intermediate in organic synthesis and industrial applications, renowned for its unique silicon-hydrogen bonding properties. One of its fundamental physical characteristics—the melting point—plays a pivotal role in determining its storage, handling, and application efficacy. This article explores the technical aspects of its melting behavior, alongside broader insights into its chemical profile, industrial relevance, and market dynamics.

​Key Physical Properties of Heptamethyltrisiloxane​

1. ​Melting Point​
   Heptamethyltrisiloxane exhibits a ​melting point below 0°C, making it a liquid at standard room temperatures (25°C). This low freezing point ensures stability in diverse climatic conditions, simplifying logistics and storage for industrial users .
2. ​Boiling Point & Density​
   With a boiling point of ​142°C (lit.)​​ and a density of ​0.819 g/mL at 25°C, the compound remains volatile yet manageable in laboratory and production settings. Its miscibility with organic solvents like acetone and ethanol further enhances its utility in formulations .
3. ​Chemical Stability​
   While reactive under specific conditions (e.g., hydrolysis with aqueous bases), heptamethyltrisiloxane is generally stable when stored inertly. Its compatibility with polyether modifications positions it as a precursor for surfactants and agricultural additives .

​Industrial Applications Driving Demand​

Heptamethyltrisiloxane’s versatility spans multiple sectors:

• ​Pesticide & Coating Additives: As a building block for polyalkyleneoxide-modified siloxanes, it improves adhesion and water repellency in coatings and pesticide formulations .
• ​Pharmaceuticals & Dyes: Its role in silylation reactions enables the synthesis of complex organic molecules, including aromatic C-H functionalized compounds .
• ​Cosmetics: Derived derivatives like 3-octyl-heptamethyltrisiloxane enhance sensory performance in skincare products, boosting market demand .

​Market Insights & Supplier Landscape​

Global suppliers, including ​, offer heptamethyltrisiloxane in bulk quantities (≥1kg) with purities exceeding 99%. Competitive pricing (79–38/kg for bulk orders) and reliable supply chains (20-ton monthly capacity) underscore its accessibility for industrial clients .

​Safety & Handling Considerations​

• ​Hazard Classification: Classified as flammable (UN 1993, PG II), it requires precautions against ignition sources and incompatible oxidizers .
• ​Storage: Ideal storage at 15–25°C in sealed containers minimizes degradation risks .

​Why Partner with Biyuan for Quality Assurance?​​

In the competitive landscape of specialty chemicals, ​Biyuan​ stands out as a trusted partner. Our commitment to delivering ​high-purity heptamethyltrisiloxane​ aligns with rigorous industry standards, ensuring optimal performance in your formulations. With advanced production facilities and a focus on innovation, Biyuan provides tailored solutions—from bulk procurement to technical support—empowering businesses to streamline operations and meet evolving market demands.

Explore our product catalog today or contact our team for customized sourcing strategies.

​References:

Hebei Zhuanglai Chemical Trading Co Ltd, 2025
ChemicalBook, 2024
Supplier Profiles, 2024
Technical Datasheets, 2024
jiangsu Tiancheng Chemical,2025

For detailed procurement inquiries, visit or connect with our regional distributors.