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Cyclopentasiloxane (D5 Silicone) is a cyclic siloxane, that has a silicon-oxygen bond in a cyclic arrangement and methyl groups attached with the silicon atom.
Cyclopentasiloxane (D5 Silicone) is used in the production of some silicon-based polymers that are widely used in various personal care products.
Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.
CAS: 541-02-6
MF: C10H30O5Si5
MW: 370.77
EINECS: 208-764-9
Synonyms
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;CD3770;cyclicdimethylsiloxanepentamer;Cyclopentasiloxane, decamethyl-;D3770;Decamethylcylopentasiloxane;siliconsf1202;unioncarbide7158siliconefluid;DECAMETHYLCYCLOPENTASILOXANE;541-02-6;Cyclopentasiloxane, decamethyl-;Cyclomethicone 5;2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;CYCLOPENTASILOXANE;Dimethylsiloxane pentamer;Dow corning 345;NUC silicone VS 7158;Silicon SF 1202;Ciclopentasiloxane;Cyclic dimethylsiloxane pentamer;Cyclomethicone D5;Dekamethylcyklopentasiloxan;D5-sil;KF 995;CCRIS 1328;VS 7158;HSDB 5683;UNII-0THT5PCI0R;0THT5PCI0R;Ddecamethylcyclopentasiloxane;EINECS 208-764-9;SF 1202;BRN 1800166;DTXSID1027184;JEESILC CPS-211;XIAMETER PMX-0245;DTXCID907184;CYCLOPENTASILOXANE (D5);D5;EC 208-764-9;4-04-00-04128 (Beilstein Handbook Reference);KF-995;DOW CORNING ST CYCLOMETHICONE 5;OCTAMETHYLCYCLOTETRASILOXANE (D5);KP-545 COMPONENT CYCLOMETHICONE 5;2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane;CYCLOMETHICONE 5 (USP-RS);CYCLOMETHICONE 5 [USP-RS];MFCD00046966;Dekamethylcyklopentasiloxan [Czech];decamethyl cyclopentasiloxane;C10H30O5Si5;Lightening Serum;D5 Cyclomethicone;dimethylcyclopentasiloxane;Decamethylcylopentasiloxane;UNII: 0THT5PCI0R;SCHEMBL28497;N-Propylheptamethyltrisiloxane;CHEMBL1885178;3CE PINK IM GOOD MASCARA;CHEBI:191092;Decamethylcyclopentasiloxane, 97%;Cyclopentasiloxane, 2,2,4,4,6,6,8,8,10,10-decamethyl-;CYCLOMETHICONE 5 [WHO-DD];BCP15826;Tox21_303170;CD3770;CYCLOPENTASILOXANE, DECAMETHYL;AKOS008901199;CS-W009767;DB11244;HY-W009051;DECAMETHYLCYCLOPENTASILOXANE [MI];NCGC00163981-01;NCGC00257224-01;AS-59731;CAS-541-02-6;DA-72620;DECAMETHYLCYCLOPENTASILOXANE [HSDB];D1890;D3770;Decamethylcyclopentasiloxane (cyclic monomer);NS00043162;D78203;S05475;Decamethylcyclopentasiloxane, analytical standard;Q414350;decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;Cyclomethicone 5, United States Pharmacopeia (USP) Reference Standard;2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane #;D5 Cyclomethicone, Pharmaceutical Secondary Standard; Certified Reference Material
Cyclopentasiloxane (D5 Silicone)The chemical formula for Cyclopentasiloxane is C10H30O5Si5.
Cyclopentasiloxane (D5 Silicone) is a non-greasy silicone that is colorless, odorless, and water-thin.
Cyclopentasiloxane (D5 Silicone) gets quickly evaporated from the skin rather than getting absorbed - making it a brilliant ingredient to be used in products that need to dry fast, like antiperspirants and hair sprays. Further, it also has lubricating properties and feels silky smooth when applied to hair and skin.
Cyclopentasiloxane (D5 Silicone), often referred to as D5, is a clear, odorless, and lightweight silicone-based compound widely used in the cosmetics and personal care industry.
Cyclopentasiloxane (D5 Silicone) belongs to a larger class of silicones known as cyclomethicones.
Cyclopentasiloxane (D5 Silicone) is valued for its unique properties that make it an excellent ingredient in various formulations.
Cyclopentasiloxane (D5 Silicone), also known as D5 and D5, is an organosilicon compound with the formula [(CH3)2SiO]5.
Cyclopentasiloxane (D5 Silicone) is a colorless and odorless liquid that is slightly volatile.
Cyclopentasiloxane (D5 Silicone) is a cyclic dimethyl polysiloxane commonly known as D5.
Cyclopentasiloxane (D5 Silicone) is a member of the family of ingredients which also include cyclotetrasiloxane (D4), cyclohexasiloxane (D6), and cyclomethicone, which is a mixture of the individual chain-length cyclic dimethyl polysiloxane compounds from D4 to D6.
Cyclopentasiloxane (D5 Silicone), also known as D5, is part of a class of silicon-based compounds known as silicones.
This category of ingredients is massive, ranging from stiff solids (like silicone kitchen instruments, for example) to extremely lightweight liquids.
Despite some fear-mongering you may hear about silicones, each silicone has unique properties and they can’t be lumped together.
Many silicones are quite beneficial for the skin, helping to lock in moisture and strengthen the moisture barrier; others are crucial to make stable, elegant formulas.
Cyclopentasiloxane is an extremely lightweight silicone that evaporates completely.
Cyclopentasiloxane (D5 Silicone)’s been shown to be completely safe when used in leave-on products.
Cyclopentasiloxane (D5 Silicone)’s not recommended for use in wash-off products like cleansers, simply because that won’t give the ingredient time to evaporate.
Cyclopentasiloxane (D5 Silicone) is the reason C+C Serum is so lightweight and leaves behind only the active ingredients.
Uses
Because of its many enriching properties, Cyclopentasiloxane (D5 Silicone) is a common ingredient used in a variety of hair and skin care products.
Cyclopentasiloxane (D5 Silicone) helps the products spread more evenly and dry quickly, thus providing all the benefits without weighing the skin or hair down.
Cyclopentasiloxane (D5 Silicone) also gives cosmetic products a silky texture.
Skin care: The hydrating properties of Cyclopentasiloxane (D5 Silicone) are great for the skin as it traps moisture, making the skin smooth and soft.
Cyclopentasiloxane (D5 Silicone) is used in lightweight products as it does not penetrate the skin but rather evaporates quickly.
Further, Cyclopentasiloxane skin care has anti-aging properties and is a great ingredient to be used in lotions
Hair care: Cyclopentasiloxane (D5 Silicone) is a great conditioner for hair because of its lubricating properties.
Cyclopentasiloxane (D5 Silicone) is commonly used in shampoos, hair conditioners, hair sprays, anti-frizz, and hair detangling products.
Cyclopentasiloxane (D5 Silicone) forms a layer on the hair, protecting and preventing it from damage while also allowing the product to spread easily and evenly
Cosmetic products: Cyclopentasiloxane (D5 Silicone) is used in makeup and makeup removers because it is non-comedogenic and does not block pores
Cyclopentasiloxane (D5 Silicone) is widely used in the formulation of conditioners, shampoos, styling products, etc.
Cyclopentasiloxane (D5 Silicone) adds shine, softness, and manageability to hair by reducing friction and preventing tangles.
Cyclopentasiloxane (D5 Silicone) also helps to seal the hair cuticle, protecting it from damage.
When used in styling products, D5 helps to control frizz, add volume, and provide heat protection for hair during styling.
Cyclopentasiloxane (D5 Silicone) is an excellent solvent for a wide range of ingredients commonly used in cosmetics and personal care products.
Cyclopentasiloxane (D5 Silicone) can dissolve various active ingredients, including vitamins, botanical extracts, and other performance-enhancing agents, ensuring they are evenly distributed throughout the formulation.
Cyclopentasiloxane (D5 Silicone) is classified as a cyclomethicone.
Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products.
Cyclopentasiloxane (D5 Silicone) is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage.
Cyclopentasiloxane (D5 Silicone) is also used as part of silicone-based personal lubricants.
D5 is considered an emollient.
In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products.
10,000–100,000 tonnes per year of Cyclopentasiloxane (D5 Silicone) is manufactured and/or imported in the European Economic Area.
Atmospheric emissions of Cyclopentasiloxane (D5 Silicone) in the Northern Hemisphere were estimated to 30,000 tonnes per year.
Cyclopentasiloxane (D5 Silicone) has also been tried as a dry-cleaning solvent in the early 2000s.
Cyclopentasiloxane (D5 Silicone) was marketed as a more environmentally friendly solvent than tetrachloroethylene (the most common dry-cleaning solvent worldwide) despite being controlled in the EU for to its persistent, bioaccumulative and toxic characteristics.
Production and polymerization
Commercially Cyclopentasiloxane (D5 Silicone) is produced from dimethyldichlorosilane.
Hydrolysis of the dichloride produces a mixture of cyclic dimethylsiloxanes and polydimethylsiloxane.
From this mixture, the cyclic siloxanes including Cyclopentasiloxane (D5 Silicone) can be removed by distillation.
In the presence of a strong base such as KOH, the polymer/ring mixture is equilibrated, allowing complete conversion to the more volatile cyclic siloxanes:
[(CH3)2SiO]5n → n [(CH3)2SiO]5
where n is a positive integer.
D4 and D5 are also precursors to the polymer.
The catalyst is again KOH.
