Octamethylcyclotetrasiloxane (IOTA D4), also known as D4, is a crucial organic silicon intermediate widely used in the production of silicone oil, silicone rubber, cosmetics, and rubber filler treatment agents. As a colorless, transparent liquid, IOTA D4 stands out for its excellent physical and chemical properties and stable performance, making it a core raw material in the organic silicon industry.

Physical and Chemical Properties:

• Melting Point: 17-18°C
• Boiling Point: 175-176°C
• Flash Point: 55°C
• Relative Density: 0.956 g/cm³ (25°C)
• Refractive Index: 1.3960~1.3970 (20°C)

Under acidic or alkaline catalysis, IOTA D4 can polymerize into silicone polymers, serving as the foundational raw material for silicone oil and silicone rubber. Its colorless and water-insoluble properties also make it an ideal ingredient for cosmetics and a direct additive for rubber filler treatment agents, enhancing the performance of rubber products.

Technical Specifications:

• Appearance: Colorless, transparent liquid, free of visible impurities
• Color Value: ≤10 Hazen units
• Mass Fraction: ≥99.0%

Applications:
IOTA D4 demonstrates its wide applicability in the following fields:

1. Silicone Oil and Silicone Rubber Production: As a foundational raw material, it is extensively used in the production of high-performance silicone oil and silicone rubber.
2. Cosmetic Ingredients: Its colorless and transparent nature makes it an ideal component in cosmetic formulations.
3. Rubber Filler Treatment Agents: It can be directly used in rubber filler treatment, improving the performance of rubber products.

Packaging and Storage:
IOTA D4 is typically packaged in plastic drums (190 kg/drum or ton drums) or standard ISO tank containers. It should be stored in a cool, dry place, avoiding contact with oxidizing agents, acids, and alkalis. Fire-fighting equipment and spill emergency treatment devices should be readily available to ensure safe transportation and storage.

Safety Notes:

• Incompatible Materials: Strong oxidizers, acids, and alkalis.
• Avoid Contact Conditions: Incompatible substances, heat sources, ignition sources, and humid air.
• Decomposition Products: In a fire, it may produce carbon oxides, hydrocarbons, silicon oxides, and combustion smoke.

IOTA D4's stability and versatility make it an indispensable raw material for the organic silicon industry. Its broad application prospects and outstanding performance will continue to drive industry development and innovation.