Absorption and retention of polydimethylsiloxanes (silicones) in fish: Preliminary experiments†

Bruggeman, W. A.; Weber‐Fung, D.; Opperhuizen, A.; VanDerSteen, J.; Wijbenga, A.; Hutzinger, O.

doi:10.1080/02772248409357032

Cited by 36 publications

(18 citation statements)

References 14 publications

(11 reference statements)

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“…Tables 6 a, 6 b, and 6 c present the 10g{Kow} values of organosilicon compounds, including linear and cyclic siloxanes and silanols, estimated at room temperature (20-25°C) by LOGKOW [19]. Apparent 10g{Kow} values of linear and cyclic siloxanes estimated by Bruggeman et al [30] are also presented in these tables for comparison. Figure 5 provides a plot of apparent In general, the linear and cyclic organosiloxanes have higher log{Kow} values than silanols.…”

Section: Octanollwater Partition Coefficient (Kow)mentioning

confidence: 98%

“…Apparent hydrophobicity or apparent 10g{K ow } has been estimated for a series of linear and cyclic organosiloxanes by using corrected retention times in reversed phase high performance liquid chromatography (HPLC) [30]. The apparent 10g{K ow } for highly hydrophobic compounds (log {Kow} > 7) may have large errors due to extrapolation involved in the estimation, and should therefore be used with caution.…”

Section: Octanollwater Partition Coefficient (Kow)mentioning

confidence: 99%

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Eco-Relevant Properties of Selected Organosilicon Materials

Mazzoni¹,

Roy²,

Grigoras³

1997

The Handbook of Environmental Chemistry

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Section: Octanollwater Partition Coefficient (Kow)mentioning

confidence: 98%

Section: Octanollwater Partition Coefficient (Kow)mentioning

confidence: 99%

Eco-Relevant Properties of Selected Organosilicon Materials

Mazzoni¹,

Roy²,

Grigoras³

1997

The Handbook of Environmental Chemistry

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“…Bruggeman et al (1984) report the results of an earlier study [de Groot (1979), in Dutch] that found traces of D4 in water from the River Rhine in 1979.…”

Section: Measured Environmental Concentrationsmentioning

confidence: 86%

“…The first study (Bruggeman et al, 1984) determined the log K ow to be 4.45 using a high performance liquid chromatography (HPLC) retention time method. A homologous series of n-alkylbenzenes were used as reference compounds.…”

Section: N-octanol-water Partition Coefficientmentioning

confidence: 99%

“…Some of these experiments provide evidence that cyclic siloxane products (ranging from D5 to D9) form in fish, but it cannot be established whether this was the result of impurities in the materials, or whether such materials were formed by transformation in the water phase followed by subsequent uptake or were formed by metabolic processes in the fish. Bruggeman et al (1984) attempted to determine the dietary uptake of D4 by guppies (Po. reticulata).…”

Section: Experimental Datamentioning

confidence: 99%

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Temperature Dependence of the Organic Carbon/Water Partition Ratios (K_OC) of Volatile Methylsiloxanes

Panagopoulos

Jahnke

Kierkegaard

et al. 2017

Environ. Sci. Technol. Lett.

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Knowing the temperature dependence of the organic carbon/water partition ratios (K OC ) of volatile methylsiloxanes (VMS) is required to understand their environmental fate. We measured the K OC of two linear VMS (lVMS), three cyclic VMS (cVMS), and six polychlorinated biphenyls (PCBs) at 25, 15, 10, and 5 °C and calculated their enthalpies and entropies of sorption to organic carbon (ΔH OC and ΔS OC , respectively). The ΔH OC of VMS ranged from −79.2 to −45.8 kJ mol −1 , while the ΔH OC of the PCBs ranged from −68.7 to −29.3 kJ mol −1 . Previously reported measurements of the enthalpy of phase change between octanol and water (ΔH OW ) for cVMS (11.3−68.8 kJ mol −1 ) differed substantially from our ΔH OC measurements, even showing different signs (negative versus positive). Literature data of ΔH OC and ΔH OW for PCBs (−61 to −17 kJ mol −1 ) are closer to our measured values of ΔH OC for the PCBs showing the same sign (negative) with differences within a factor of 2 in the majority of the cases. Comparison of all available data for PCBs and VMS indicated that there may be important differences between ΔH OC and ΔH OW , especially for the VMS. Therefore, assuming ΔH OC equals ΔH OW in environmental fate models may be a source of substantial error.

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Silicones

Greene,

House‐Knight,

Gentry

et al. 2023

Patty's Toxicology

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Linear polydimethylsiloxanes (PDMS), often commonly referred to as “silicones,” “siloxanes,” “organosilicones,” or “organosiloxanes,” are polymeric organosilicon substances composed of dimethylsiloxy units with trimethylsilyl end groups. This class of PDMS may best be represented by the main CAS number [ 63148‐62‐9 ], although other CAS numbers [( 9016‐00‐6 ) and ( 63394‐02‐5 )] may be considered representative of this class of compounds. PDMS are manmade organosilicon compounds that range from low molecular weight volatile materials to high molecular weight polymeric materials. Silicones have a wide range of applications found in all areas of everyday life. The chemical, rubber, plastics, and construction industries make up the majority of the total market volume. Results from studies conducted in animals following oral, dermal, and inhalation exposure indicated minimal adverse effects, with no significant increase reported in mortality or malignant or benign tumors. Due to the wide use of PDMS fluids in foods, drugs, cosmetics, and implants studies in humans have been conducted. The overall weight of medical and scientific evidence supports the conclusion that PDMS fluids used in food, drugs, and cosmetics, as well as in implants, at the concentrations currently in the marketplace, are not associated with an increased risk of adverse health effects.

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Absorption and retention of polydimethylsiloxanes (silicones) in fish: Preliminary experiments†

Cited by 36 publications

References 14 publications

Eco-Relevant Properties of Selected Organosilicon Materials

Eco-Relevant Properties of Selected Organosilicon Materials

Temperature Dependence of the Organic Carbon/Water Partition Ratios (K_OC) of Volatile Methylsiloxanes

Silicones

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Absorption and retention of polydimethylsiloxanes (silicones) in fish: Preliminary experiments†

Cited by 36 publications

References 14 publications

Eco-Relevant Properties of Selected Organosilicon Materials

Eco-Relevant Properties of Selected Organosilicon Materials

Temperature Dependence of the Organic Carbon/Water Partition Ratios (KOC) of Volatile Methylsiloxanes

Silicones

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Product

Resources

About

Temperature Dependence of the Organic Carbon/Water Partition Ratios (K_OC) of Volatile Methylsiloxanes