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CAS Number : 69430-24-6
EC Number : 614-966-1
Molecular Formula : H10O5Si5
Molecular Weight : 230.50
Cyclomethicone, also known as D5 and D5, is an organosilicon compound with the formula H10O5Si5.
Cyclomethicone is a colorless and odorless liquid that is slightly volatile.
Use of Cyclomethicone
Cyclomethicone is classified as a cyclomethicone.
Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products.
Cyclomethicone is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage.
Cyclomethicone is also used as part of silicone-based personal lubricants.
Cyclomethicone 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 Cyclomethicone is manufactured and/or imported in the European Economic Area.
Atmospheric emissions of Cyclomethicone in the Northern Hemisphere were estimated to 30,000 tonnes per year.
Cyclomethicone is a silicone-based compound that is in the form of a clear, odorless liquid.
Cyclomethicone is responsible for giving a silky texture to the skin or hair, and also aids the spreadability of the product.
Cyclomethicone works really well with the other ingredients in a formulation and helps stabilize the product.
Cyclomethicone can not only improve the texture of the surface that it is applied on, but also the texture of the product itself.
The chemical formula of Cyclomethicone is C10H30O5Si5.
Cyclomethicone has a great number of uses and benefits for the skin and hair.
Cyclomethicone is therefore used in a wide range of products when it comes to the cosmetic and skin/hair care industry.
Skin care:
Cyclomethicone gives a smooth and silky touch to the skin.
Cyclomethicone is used in a variety of cosmetic products as it creates a barrier between the skin and the environment and thus protects it from the harmful external factors.
Cyclomethicone locks the moisture on the skin surface and prevents water loss.
Thus, Cyclomethicone is beneficial for dry and flaky skin. Moreover, it has also been known to improve the appearance of scars.
Hair care:
Cyclomethicone is responsible for improving the texture of the formulations that it is added in.
Cyclomethicone gives luster and shine to the shafts while also making them appear healthier and bouncier.
Industry Uses of Cyclomethicone
Adhesives and sealant chemicals
-Anti-adhesive agents
-Diluent
-Intermediate
-Intermediates
-Lubricants and lubricant additives
-Softener and conditioner
-Solvent
-Solvents (which become part of product formulation or mixture)
-Terminator/Blocker
-Viscosity adjustors
-Viscosity modifiers
Consumer Uses of Cyclomethicone
Adhesives and sealant chemicals
-Cleaning agent
-Diluent
-Intermediates
-Lubricants and lubricant additives
-Softener and conditioner
-Solvent
-Solvents (which become part of product formulation or mixture)
-Viscosity adjustors
General Manufacturing Information
Industry Processing Sectors
-Adhesive Manufacturing
-All Other Basic Inorganic Chemical Manufacturing
-All Other Basic Organic Chemical Manufacturing
-All Other Chemical Product and Preparation Manufacturing
-Asphalt Paving, Roofing, and Coating Materials Manufacturing
-Computer and Electronic Product Manufacturing
-Cyclic Crude and Intermediate Manufacturing
-Other (requires additional information)
-Paint and Coating Manufacturing
-Soap, Cleaning Compound, and Toilet Preparation Manufacturing
-Synthetic Rubber Manufacturing
-Wood Product Manufacturing
Cyclomethicone is a general term describing both individual and/or a mixture of cyclic siloxane materials that have many uses and are found in a variety of consumer products.
Cyclomethicones are derived from the natural elements silicon and oxygen.
Created as an alternative emollient to existing products, cyclomethicone’s chemical structure allows for easy application across the skin while reducing pore entry and skin stickiness.
Skin care products delivering dimethicone and essential oils now rely on cyclomethicone for easy application of products.
Cyclomethicone differs from other silicones because its silicones have a lower molecular weight that remains unmodified.
Cyclomethicone also possesses a cyclical structure.
Cyclomethicone make a cosmetic delivery system because of the low heat levels required for vaporization.
Silicones in an unmodified state remain on or near the skin’s surface in part because of the molecule’s size, which prevents passage beyond the outer parts of the skin.
Cyclomethicone is a completely clear liquid ingredient that gives skin care products the quality of being able to spread easily and smoothly, especially across skin.
Its structure is cyclical and has a low molecular weight.
Cyclocmethicone’s structure limits its ability to penetrate through the dermis layer, which means the molecules mingle with dry skin before evaporating quickly.
Cyclomethicone has many uses and is in skin lotions, fragrances, and hair conditioners.
Because Cyclomethicone evaporates quickly when applied to the skin, some have experienced skin and eye irritation.
However, it is a vegan, gluten-free, and soy-free ingredient, and is deemed safe to use by the FDA in concentrations of less than 10 percent.
Cyclomethicone is a mixture of cyclic dimethylpolysiloxane compounds used primarily as an emollient and solvent in cosmetic formulations at concentrations from < 0.1 % to > 50%.
Cyclomethicone is not significantly absorbed through the skin.
Small amounts of Cyclomethicone were absorbed by both humans and monkeys in oral feeding studies.
The absorbed Cyclomethicone was detected in both the urine and expired air.
Cyclomethicones are cyclic (circular) silicones of low molecular weight that possess a cyclical structure rather than a chain structure (like Dimethicone).
Some Cyclomethicones are volatile (they evaporate) while others are not.
Cyclomethicones that are volatile include D4 (Cyclotetrasiloxane), D5 (Cyclopentasiloxane) and D6 (Cyclohexasiloxane).
In general, the lower the number, the more volatile the cyclic silicone and the faster it evaporates.
Cyclomethicone is a volatile silicone oil used in hair and skincare products to impart skin conditioning, emolliency, shine and/or silkiness; to reduce the greasy feel of tanning oils; promotes easy spreadability, and leaves a soft, silky smooth feel to the skin.
Cyclomethicone’s chemical structure allows for easy application across the skin while reducing pore entry and skin stickiness.
Cyclomethicone’s structure limits its ability to penetrate through the dermis layer, which means the molecules mingle with dry skin before evaporating quickly.
Cyclomethicone has many uses in skin lotions, fragrances, and hair conditioners.
Cyclomethicone is a fast spreading, volatile silicone solution used for a wide range of skincare and haircare products.
Cyclomethicone creates a barrier on the skin to prevent dehydration, as well as a very smooth afterfeel.
Prevents skin from feeling tacky after the product has been applied.
Works in a variety ways, namely as a conditioning agent, solvent, humectant, carrying agent and viscosity controlling agent.
Like all other silicones, this ingredient has a unique fluidity that makes it easily spreadable.
When applied to the skin and hair, it gives a silky & slippery feeling to the touch and acts a mild water repellent by forming a protective barrier on the skin.
Cyclomethicone can also fill in fine lines/wrinkles, giving the face a temporary “plump” look.
Because its molecules are too big to physically penetrate the skin, it does not have any true moisturizing properties, but rather mostly functions as a carrying agent for other ingredients contained in a product.
Cyclomethicone's particularly useful at quickly delivering nutrients to the skin & hair and evaporating into the air.
Cyclomethicone can also work as a base solvent for perfume oils and fragrance oils, as well as an anti-static agent.
Cyclomethicone's particularly useful as a hair conditioner because it provides a silky feel with out weighing the hair down with greasy residue.
Cyclomethicone can be found in a variety of cosmetic products such as facial moisturizer/lotion, foundation, shampoo/conditioner, body spray, sunscreen, anti-aging treatment, antiperspirant/deodorant, concealer, hair dye and eye cream.
Cyclomethicone is used to blend with fragrance oils and perfume oils for after bath body mists.
Cyclomethicone will produce a luxurious body spray that feels dry.
Cyclomethicone is used in a wide variety of cosmetic applications such as antiperspirants, deodorants, lotions, creams, hair sprays, bath oils, makeup and nail polish.
For making clear sprays, pour Cyclomethicone in bottle and add fragrance oil.
Uses of Cyclomethicone
-Topical pharmaceutical formulations
-Creams
-Gels
-Medicated treatments for skin and scalp applications
Substance identity
EC / List no.: 614-966-1
CAS no.: 69430-24-6
Hazard classification & labelling of Cyclomethicone
According to the notifications provided by companies to ECHA in REACH registrations no hazards have been classified.
About Cyclomethicone
Cyclomethicone is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 10 000 to < 100 000 tonnes per annum.
Cyclomethicone is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
Consumer Uses of Cyclomethicone
Cyclomethicone is used in the following products: cosmetics and personal care products, washing & cleaning products, polishes and waxes, pharmaceuticals and textile treatment products and dyes.
Other release to the environment of Cyclomethicone is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), outdoor use, indoor use in close systems with minimal release (e.g. cooling liquids in refrigerators, oil-based electric heaters) and outdoor use in close systems with minimal release (e.g. hydraulic liquids in automotive suspension, lubricants in motor oil and break fluids).
Article service life of Cyclomethicone
Release to the environment of Cyclomethicone can occur from industrial use: industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal) and of articles where the substances are not intended to be released and where the conditions of use do not promote release.
Other release to the environment of Cyclomethicone is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials), indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment), indoor use in long-life materials with high release rate (e.g. release from fabrics, textiles during washing, removal of indoor paints) and outdoor use in long-life materials with high release rate (e.g. tyres, treated wooden products, treated textile and fabric, brake pads in trucks or cars, sanding of buildings (bridges, facades) or vehicles (ships)).
Cyclomethicone can be found in complex articles, with no release intended: vehicles.
Widespread uses by professional workers of Cyclomethicone
Cyclomethicone is used in the following products: washing & cleaning products, polishes and waxes, cosmetics and personal care products and coating products.
Cyclomethicone is used in the following areas: formulation of mixtures and/or re-packaging, building & construction work and health services.
Cyclomethicone is used for the manufacture of: and textile, leather or fur.
Other release to the environment of Cyclomethicone is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), outdoor use and indoor use in close systems with minimal release (e.g. cooling liquids in refrigerators, oil-based electric heaters).
Formulation or re-packing of Cyclomethicone
Cyclomethicone is used in the following products: cosmetics and personal care products, polishes and waxes, washing & cleaning products, pharmaceuticals, coating products and textile treatment products and dyes.
Release to the environment of Cyclomethicone can occur from industrial use: formulation of mixtures and formulation in materials.
Uses at industrial sites of Cyclomethicone
Cyclomethicone is used in the following products: washing & cleaning products, polymers, laboratory chemicals, polishes and waxes, cosmetics and personal care products and pH regulators and water treatment products.
Cyclomethicone is used in the following areas: scientific research and development and building & construction work.
Cyclomethicone is used for the manufacture of: chemicals, textile, leather or fur and electrical, electronic and optical equipment.
Release to the environment of Cyclomethicone can occur from industrial use: in processing aids at industrial sites, as an intermediate step in further manufacturing of another substance (use of intermediates), for thermoplastic manufacture, as processing aid, of substances in closed systems with minimal release, in the production of articles and as processing aid.
Manufacture of Cyclomethicone
Release to the environment of Cyclomethicone can occur from industrial use: manufacturing of the substance.
Synonyms:
Cyclosiloxanes, di-Me
Cyclicdimethylpolysiloxane
Cyclomethicone
Cyclopolydimethylsiloxane
Cyclosiloxanes, di-Me
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Dimethyl Cyclosiloxanes
Dimethylcyclopolysiloxane
Dimethylcyclosiloxanes
Mixed Cyclosiloxanes
Polydimethylcyclosiloxane
SILICONE FLUID
Cyclomethicone
69430-24-6
0THT5PCI0R
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecan [German] [ACD/IUPAC Name]
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane [ACD/IUPAC Name]
2,2,4,4,6,6,8,8,10,10-Décaméthyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilécane [French] [ACD/IUPAC Name]
208-764-9 [EINECS]
541-02-6 [RN]
Cyclic dimethylsiloxane pentamer
cyclomethicone 5
Cyclopentasiloxane, 2,2,4,4,6,6,8,8,10,10-decamethyl- [ACD/Index Name]
D5 Cyclomethicone
decamethyl cyclopentasiloxane
Decamethylcyclopentasiloxane [Wiki]
Decamethyl-cyclopentasiloxane
Dekamethylcyklopentasiloxan [Czech]
GY5945200
MFCD00046966 [MDL number]
1,3,5,7,9,2λ2,4λ2,6λ2,8λ2,10λ2-pentaoxapentasilecane
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane; D5
4-04-00-04128 [Beilstein]
4-04-00-04128 (Beilstein Handbook Reference) [Beilstein]
CYCLOMETHICONE
Cyclopentasiloxane [ACD/Index Name]
cyclopentasiloxane, decamethyl-
D5
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
Dimethylsiloxane pentamer
Dekamethylcyklopentasiloxan
CYCLOMETHICONE
Ciclopentasiloxane
Cyclomethicone D5
0THT5PCI0R
Ddecamethylcyclopentasiloxane
Dow corning 345 fluid
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane
Dow corning 345
NUC silicone VS 7158
Silicon SF 1202
Cyclopentasiloxane, 2,2,4,4,6,6,8,8,10,10-decamethyl-
Cyclic dimethylsiloxane pentamer
MFCD00046966
Union carbide 7158 silicone fluid
KF 995
VS 7158
D5-sil
CCRIS 1328
HSDB 5683
Dekamethylcyklopentasiloxan [Czech]
EINECS 208-764-9
UNII-0THT5PCI0R
decamethyl cyclopentasiloxane
SF 1202
BRN 1800166
D5 Cyclomethicone
D5
dimethylcyclopentasiloxane
Decamethylcylopentasiloxane
DSSTox_CID_7184
JEESILC CPS-211
EC 208-764-9
DSSTox_RID_78338
DSSTox_GSID_27184
SCHEMBL28497
N-Propylheptamethyltrisiloxane
XIAMETER PMX-0245
4-04-00-04128 (Beilstein Handbook Reference)
CYCLOPENTASILOXANE (D5)
CHEMBL1885178
DTXSID1027184
CYCLOPENTASILOXANE [INCI]
CHEBI:191092
Decamethylcyclopentasiloxane, 97%
CYCLOMETHICONE 5 [USP-RS]
CYCLOMETHICONE 5 [WHO-DD]
BCP15826
Tox21_303170
CD3770
KF-995
AKOS008901199
ZINC169743678
CS-W009767
DB11244
DOW CORNING ST CYCLOMETHICONE 5
DECAMETHYLCYCLOPENTASILOXANE [MI]
NCGC00163981-01
NCGC00257224-01
OCTAMETHYLCYCLOTETRASILOXANE (D5)
AS-59731
CAS-541-02-6
DECAMETHYLCYCLOPENTASILOXANE [HSDB]
KP-545 COMPONENT CYCLOMETHICONE 5
D1890
D3770
Decamethylcyclopentasiloxane (cyclic monomer)
FT-0665531
DOW CORNING UP-1002 ULTRA PURE FLUID
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
Ddecamethylcyclopentasiloxane
decamethy lcyclopentasiloxane
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
decamethylcyclopentasiloxane, ???
Dekamethylcyklopentasiloxan [Czech]
Dimethylsiloxane pentamer
Dow corning 345 [Trade name]
Dow corning 345 fluid [Trade name]
EINECS 208-764-9
NCGC00163981-01
NUC silicone VS 7158 [Trade name]
Silicon SF 1202 [Trade name]
UNII:0THT5PCI0R
UNII-0THT5PCI0R
Union carbide 7158 silicone fluid [Trade name]
