Cyclosiloxanes - Information Center

Technical Information

Chemical properties

D4, D5 and D6 are colorless and odorless liquids. Some of their key physico-chemical properties are summarized below.

Environmental properties

The high Henry’s law constant combined with low water solubility means that D4, D5 and D6 have a strong tendency to partition from water to air meaning that they evaporate readily from formulations applied in thin layers. From this data alone, it can be predicted that the atmosphere will be the main environmental compartment for D4, D5 and D6.

The diagrams below describe the emission patterns of D4 and D5 respectively.

The diagrams show that more than 99.9 percent of emissions go to air and soil. In these diagrams, the Kow is a property which describes the equilibrium distribution of a substance between water and octanol (a fat simulant), the Koc describes the distribution between organic carbon and water, and the Kaw describes the distribution between air and water.

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Click on the diagram below to zoom in

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