CYCLOPENTASILOXANE
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About the ratings
EWG provides information on personal care product ingredients from the published scientific literature, to supplement incomplete data available from companies and the government. The ratings below indicate the relative level of concern posed by exposure to the ingredients in this product - not the product itself - compared to other product formulations. The ratings reflect potential health hazards but do not account for the level of exposure or individual susceptibility, factors which determine actual health risks, if any.
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Function/use(s): Hair Conditioning Agent; Skin-Conditioning Agent - Emollient; Solvent; SKIN CONDITIONING
About CYCLOPENTASILOXANE: Cyclopentasiloxane (cyclomethicone) is a silicon-based cyclic compound; may be associated with environmental toxicity.
Synonym(s): CYCLOPENTASILOXANE, DECAMETHYL-; DECAMETHYLCYCLOPENTASILOXANE; DECAMETHYL- CYCLOPENTASILOXANE
Organ system toxicity (non-reproductive) |
| type of concern |
product conditions |
reference |
| Classified as expected to be toxic or harmful |
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Environment Canada Domestic Substance List |
Persistence and bioaccumulation |
| type of concern |
product conditions |
reference |
| Persistent, bioaccumulative in wildlife |
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Canada PBTs - Accelerated Reduction/Elimination of Toxics (ARET) |
Endocrine disruption |
| type of concern |
product conditions |
reference |
| One or more animal studies show endocrine disruption at moderate doses |
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McKim JM Jr, Choudhuri S, Wilga PC, Madan A, Burns-Naas LA, Gallavan RH, Mast RW, Naas DJ, Parkinson A, Meeks RG, 1999 |
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| One or more animal studies show endocrine disruption at moderate doses |
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Siddiqui WH, Stump DG, Reynolds VL, Plotzke KP, Holson JF, Meeks RG, 2007 | |
Neurotoxicity |
| type of concern |
product conditions |
reference |
| One or more animal studies show effects at moderate doses |
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Jean PA, McCracken KA, Arthurton JA, Plotzke KP, 2005 |
Cancer |
| type of concern |
product conditions |
reference |
| One or more animal studies show tumor formation at moderate doses |
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Dow Corning Corporation, 2005 |
Ecotoxicology |
| type of concern |
product conditions |
reference |
| Suspected to be an environmental toxin and be persistent or bioaccumulative |
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Environment Canada Domestic Substance List |
| show more |
| Suspected to be an environmental toxin |
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Environment Canada Domestic Substance List | |
Data gaps |
| type of concern |
product conditions |
reference |
| 48 studies in PubMed science library may include information on the toxicity of this chemical
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PubMed |
Government, industry, academic studies and classifications |
| government/industry list/academic study |
appears on list as |
classification(s) |
| Canada PBTs - Accelerated Reduction/Elimination of Toxics (ARET) | CYCLOPENTASILOXANE, DECAMETHYL | Identified as a priority action PBT under Environment Canada's July 2006 assessment |
| Dow Corning Corporation, 2005 | DECAMETHYLCYCLOPENTASILOXANE | Uterine tumors in female rats |
| Siddiqui WH, Stump DG, Reynolds VL, Plotzke KP, Holson JF, Meeks RG, 2007 | DECAMETHYLCYCLOPENTASILOXANE | Increased anogenital distance observed in rats at a moderate dose. |
| McKim JM Jr, Choudhuri S, Wilga PC, Madan A, Burns-Naas LA, Gallavan RH, Mast RW, Naas DJ, Parkinson A, Meeks RG, 1999 | DECAMETHYLCYCLOPENTASILOXANE | Alters activity of liver enzyemes that metabolize chemicals with hormone activity. |
| Jean PA, McCracken KA, Arthurton JA, Plotzke KP, 2005 | DECAMETHYLCYCLOPENTASILOXANE | Moderate dose in rate suggested dopamine D2-receptor behavior on pituitary cells. |
| Environment Canada Domestic Substance List | CYCLOPENTASILOXANE, DECAMETHYL- | Y-Categorization,,,Y-Persistent,Y-Bioaccumulative,Y-AquaticTox,,,, |
| IFRA Fragrance Ingredient List | DECAMETHYLCYCLOPENTASILOXANE | reported as used in fragrance compounds in 2008 |
Other RTECS® classifications [shown for informational purposes only] |
| government/industry list/academic study |
appears on list as |
classification(s) |
| RTECS®- "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J 1986 | CYCLOPENTASILOXANE | • sense organ - Primary eye irritant (rabbit ) • skin - Primary skin irritant (rabbit )
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| RTECS®- National Technical Information Service 0101 | CYCLOPENTASILOXANE | • liver - Changes in liver weight (rat TDLo) • biochemical - Hepatic microsomal mixed oxidase (dealkylation, hydroxylation, etc.) (rat TDLo) • liver - Other changes (rat TDLo)
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references |
| government/industry list/academic study
| reference
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| Canada PBTs - Accelerated Reduction/Elimination of Toxics (ARET) | EC (Environment Canada). 1994. Accelerated Reduction/Elimination of Toxics (ARET). ARET substance list of persistent, bioaccumulative and toxic chemicals. |
| Open scientific literature | Dow Corning Corporation. 2005. Decamethylcyclopentasiloxane: A 24-month combined chronic toxicity and oncogenicity whole body vapor inhalation study in Fischer-344 rats. Dow Corning Report No. 2005-1000-54953. 4062. |
| Open scientific literature | Siddiqui WH, Stump DG, Reynolds VL, Plotzke KP, Holson JF, Meeks RG. 2007. A two- generation reproductive toxicity study of decamethylcyclopentasiloxane (D5) in rats exposed by whole-body vapor inhalation. Reprod Toxicol. 23(2):216-25. |
| Open scientific literature | McKim JM Jr, Choudhuri S, Wilga PC, Madan A, Burns-Naas LA, Gallavan RH, Mast RW, Naas DJ, Parkinson A, Meeks RG. 1999. Induction of hepatic xenobiotic metabolizing enzymes in female Fischer-344 rats following repeated inhalation exposure to decamethylcyclopenta- siloxane. Toxicol Sci. 50(1):10-19. |
| Open scientific literature | Jean PA, McCracken KA, Arthurton JA, Plotzke KP. 2005b. Investigation of octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) as dopamine D2- receptor agonists. Toxicologist 84(S-1):370. |
| Environment Canada Domestic Substance List | EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry. |
| IFRA Fragrance Ingredient List | IFRA (International Fragrance Assocication). 2010. IFRA Fragrance Ingredient List based on 2008 Use Survey. Accessed online 01/04/2010: http://www.ifraorg.org/Home/News/Latest-News/page.aspx/66?xf_itemId=43&xf_selectionDatapartId=25 |
| RTECS®- "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J 1986 [shown for informational purposes only] | RTECS®- "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 -,1234,1986 |
| RTECS®- National Technical Information Service 0101 [shown for informational purposes only] | RTECS®- National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. OTS0590101 |
"RTECS®" is a United States trademark owned and licensed under authority of the U.S. Government, by and through MDL Information Systems, Inc.