Octamethylcyclotetrasiloxane, CAS No. 556-67-2

Welcome to iChemical.com!

In the below part, please select the country you want us to ship to: Please note that once you've selected a shipping country, all pricing information on our website will be automatically updated to include door-to-door shipping to the country you specified.

North America

South America

Africa

Europe

Asia

Oceania

556-67-2

Catalog No. EBD45670

CAS 556-67-2

Name Octamethylcyclotetrasiloxane

Get Quote

Basic Information

Synonyms: Octamethylcyclotetrasiloxane 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetroxatetrasilocane octamethyltetrasiloxane oktamethylcyklotetrasiloxan octamethyl-cyclotetrasiloxan octamethylcyclotetraoxysilane cyclicdimethylsiloxanetetramer cyclotetrasiloxane,octamethyl- tetracyclosiloxane,octamethyl- dimethylsiloxanecyclictetramer

Molecular Formula: C8H24O4Si4

Molecular Weight: 296.62

MDL Number: MFCD00003269

Categories: Materials Chemistry > Polymers and Macromolecular Materials > Polymer Additives Functional Chemicals > Consumer & Industrial Chemicals > Industrial Auxiliaries Synthetic Chemistry > Organic Building Blocks > Other Organic Building Blocks

Product Description:

Octamethylcyclotetrasiloxane (D4) is a cyclic siloxane with the formula [(CH3)2SiO]4. It is a colorless, volatile liquid with a mild odor. It is a key monomer and intermediate in the silicone industry. Its primary application is as a monomer for the production of polydimethylsiloxanes (PDMS), which are widely used in silicone oils, rubbers, resins, and sealants. It also serves as a carrier fluid, lubricant, and release agent in various industrial and consumer applications, including personal care products (e.g., in hair and skin care formulations as a volatile conditioning agent) and as a component in cleaning products. D4 is considered a high-production-volume chemical. It is subject to regulatory scrutiny due to concerns regarding its persistence, bioaccumulation potential, and environmental toxicity, particularly to aquatic organisms. Safe handling requires adequate ventilation as it is volatile.

Physical Properties

Melting Point: 17-18 °C(lit.)

Boiling Point: 175-176 °C(lit.)

Flash Point: 55 °C

Density: 1 (vs air)

Solubility: INSOLUBLE

Refractivity: n20/D 1.396(lit.)

Storage: 2-8°C

Safety Information

Packing Level: III

Hazard Category: 3

Transport Codes: 1993C

Analytical Data

Appearance: Colorless clear liquid