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CYCLOPENTASILOXANE
Cyclopentasiloxane is an organosilicon compound with the formula [(CH3)2SiO]5. It is a colorless and odorless liquid that is slightly volatile.
Cas No: 541-02-6
EC NO: 208-764-9
IUPAC Name: 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-pentoxapentasilecane
2,2,4,4,6,6,8,8,10,10-decamethylcyclopentasiloxane
D5
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Decamethylcyclopentasiloxan
DECAMETHYLCYCLOPENTASILOXANE
Decamethylcyclopentasiloxane
decamethylcyclopentasiloxane
Decamethylcyclopentasiloxane
decamethylcyclopentasiloxane, D5
SYNONYMS
cyclopentasiloxane, 2,2,4,4,6,6,8,8,10,10-decamethyl-;decamethyl cyclopentasiloxane;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;2,2,4,4,6,6,8,8,10,10- decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane;decamethylcyclopentasiloxane; dow corning 345;silicon SF 1202;union carbide 7158 silicone fluid;0THT5PCI0R;1800166;208-764-9;541-02-6;Cyclic dimethylsiloxane pentamer;cyclomethicone 5;D5 Cyclomethicone;decamethyl cyclopentasiloxane;Decamethylcyclopentasiloxane;Decamethyl-cyclopentasiloxane;Dekamethylcyklopentasiloxan;GY5945200;MFCD00046966;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;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 ;4-04-00-04128 (Beilstein Handbook Reference) ;CYCLOMETHICONE;Cyclopentasiloxane;cyclopentasiloxane, decamethyl-;D5;Ddecamethylcyclopentasiloxane;decamethy lcyclopentasiloxane;decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;decamethylcyclopentasiloxane 97%;decamethylcyclopentasiloxane 99%;decamethylcyclopentasiloxane, ;decamethylcyclopentasiloxane, 97%;Dekamethylcyklopentasiloxan;Dimethylsiloxane pentamer;Dow corning 345;Dow corning 345 fluid;EINECS 208-764-9;NCGC00163981-01;NUC silicone VS 7158 ;Silicon SF 1202UNII:0THT5PCI0RUNII-0THT5PCI0RUnion carbide 7158 silicone fluid;DECAMETHYLCYCLOPENTASILOXANE;
541-02-6;Cyclopentasiloxane, decamethyl-;Cyclomethicone 5;CYCLOMETHICONE;Dimethylsiloxane pentamer;2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;Dekamethylcyklopentasiloxan;UNII-0THT5PCI0R;Ddecamethylcyclopentasiloxane;0THT5PCI0R;Decamethylcyclopentasiloxane, 97%;MFCD00046966;Dow corning 345 fluid;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;Union carbide 7158 silicone fluid;KF 995;VS 7158;CCRIS 1328;HSDB 5683;Dekamethylcyklopentasiloxan;EINECS 208-764-9;decamethyl cyclopentasiloxane;SF 1202;BRN 1800166;Ciclopentasiloxane;Cyclomethicone D5;D5 Cyclomethicone;dimethylcyclopentasiloxane;Decamethylcylopentasiloxane;DSSTox_CID_7184;ACMC-209ld1;EC 208-764-9;DSSTox_RID_78338;DSSTox_GSID_27184;SCHEMBL28497;4-04-00-04128 (Beilstein Handbook Reference);CHEMBL1885178;DTXSID1027184;BCP15826;Tox21_303170;ANW-31955;CD3770;AKOS008901199;ZINC169743678;DB11244;MCULE-6274880347;2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane;NCGC00163981-01;NCGC00257224-01;AK608817;AS-59731;SC-81690;D1890;D3770;Decamethylcyclopentasiloxane (cyclic monomer);FT-0665531;S05475;Decamethylcyclopentasiloxane, analytical standard;Q414350;decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;UNII-NMQ347994Z component XMSXQFUHVRWGNA-UHFFFAOYSA-N;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 R
Use
The compound is classified as a Cyclomethicone. Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. It is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage. It 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 D5 is manufactured and/or imported in the European Economic Area. Atmospheric emissions of D5 in the Northern Hemisphere were estimated to 30,000 tonnes per year.
Production and polymerization
Commercially D5 is produced from dimethyldichlorosilane. Hydrolysis of the dichloride produces a mixture of cyclic dimethylsiloxanes and polydimethylsiloxane. From this mixture, the cyclic siloxanes including D5 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:
n⁄5 [(CH3)2SiO]n → n [(CH3)2SiO]5
D4 and D5 are also precursors to the polymer. The catalyst is again KOH.
What Is Cyclopentasiloxane?
Cyclopentasiloxane is a common ingredient in skincare and body care products, used to improve the texture of formulations, helping products to glide on smoothly and evenly. It also has the added benefit of acting as a protective barrier to the skin, protecting the skin from moisture loss, allergens, and bacteria.
Cyclopentasiloxane is part of a family of small silicones called cyclomethicones. Cyclomethicones are clear, odorless liquids utilized in skincare products to give your skincare a smooth texture that allows the product’s key ingredients to be delivered evenly to the skin. Cyclomethicones are part of the silicone family and are used in a similar way to dimethicone, which you may be familiar with. Cyclomethicones help smooth the texture of products, improve the appearance of scarring, increase the water-resistance abilities of formulations, and emulsify the product. However, cyclomethicones are also better at delivering active ingredients to the skin as they are more volatile than larger silicones and slowly evaporate from the skin. When cyclomethicones disappear, they leave behind the formulation’s essential ingredients.
Cyclopentasiloxane is one of the most common ingredients used in personal care products today. Synthetically manufactured, it is a silicone derivative that carries a variety of skin and hair applications, such as hair spray and sunscreens. With a broader focus on uses in styling, cyclopentasiloxane is finding more and more popularity in hair care products, and those where a microscopic protective layer may benefit the skin.
Cyclomethicones are sometimes also called cyclosiloxanes; they are different names for the same class of chemicals. The two most commonly used cyclomethicones are Cyclopentasiloxane and cyclohexasiloxane; you may have seen these ingredients somewhere near the bottom of your product’s ingredients list.
Cyclopentasiloxane has a ring-shaped structure that makes it more volatile or less stable. This instability allows cyclopentasiloxane to evaporate when applied to your skin—making it an excellent ingredient for products that need to go on smoothly but not remain sticky after application. As all the Cyclopentasiloxane eventually evaporates from the surface of the skin, it leaves behind the other key components in the product to work their magic. This action of evaporation makes it an excellent carrier ingredient.
Sensitivity
It is believed that Cyclopentasiloxane may have some capacity to reduce the appearance of wrinkles, actually help in the healing of skin blemishes and calm the visible effects of rosacea. Cyclopentasiloxane is an emollient that soothes and softens the skin by keeping moisture locked in. This characteristic helps to prevent water loss and maintain the integrity of the skin’s natural barrier. Protecting or preserving the skin’s natural barrier is an essential part of keeping sensitivity issues at bay. Disruption of the skin’s natural barrier is considered to be linked with skin conditions such as eczema, dermatitis, and psoriasis.
If you have sensitive skin, be mindful of the other ingredients in your product that may irritate, such as fragrance, because the Cyclopentasiloxane will deliver these ingredients effectively to the skin. In some cases, minor irritation may occur from the use of silicones, but it’s not usually the source of sensitivity in a product.
Environment
Cyclopentasiloxane doesn’t readily degrade. This may have a disrupting effect on the environment. As a precautionary measure, the European Union in 2020, limited concentrations of Cyclopentasiloxane in products to 0.1%. 0.1% is generally the concentration it is used at, so this is unlikely to affect the formulation of your favorite skincare products if other countries adopt this same policy.
Cyclopentasiloxane is a silicone regularly used in cosmetic products. It’s commonly found in medical implants, sealants, lubricants, and windshield coatings.
Cyclopentasiloxane is colorless, odorless, non-greasy, and water-thin. It doesn’t get absorbed into the skin. Rather, it evaporates quickly away from it. This property makes it a useful ingredient in cosmetic products that need to dry quickly, like antiperspirants and hair sprays.
It also has lubricating properties. This gives a slippery and silky feeling when applied to the skin and hair and allows the product to spread more easily.
What is it used for?
Cyclopentasiloxane is known for being able to evaporate and dry quickly. Silicones are also known to repel water and glide easily. This is why they are commonly used as ingredients in lubricants and sealants.
They are also known to form a protective barrier on the skin and hair. This can help you detangle your hair, prevent breakage, and reduce frizz.
Cyclopentasiloxane can be found in a wide range of personal care products. Examples include:
hair spray
sunscreen
antiperspirant
deodorant
hair conditioner
shampoo
hair detangling products
waterproof mascara
foundation
eyeliner
concealer
moisturizer with SPF
eye shadow
hairstyling gel and lotion
lipstick
It sometimes appears on a label as decamethylcyclopentasiloxane or D5. It may also be put under the broader category name of Cyclomethicone.
It’s different from another siloxane known as dimethicone or polydimethylsiloxane (PDMS).
Cyclopentasiloxane is a cyclic siloxane used in the formulation of consumer products as well as an industrial intermediate. A summary of the previous studies on the toxicology of Decamethylcyclopentasiloxane Cyclopentasiloxane is provided. Toxicokinetic studies with Cyclopentasiloxane after dermal administration demonstrate a very low uptake due to rapid evaporation. Following inhalation exposure, exhalation of unchanged Cyclopentasiloxaneand excretion of metabolites with urine is major pathways for clearance in mammals. Due to this rapid clearance by exhalation, the potential for bioaccumulation of Cyclopentasiloxane is considered unlikely. The available toxicity data on Cyclopentasiloxane adequately cover the relevant endpoints regarding potential human health hazards. Cyclopentasiloxane was not DNA reactive or mutagenic in standard in vitro and in vivo test systems. Cyclopentasiloxane also did not induce developmental and reproductive toxicity inappropriately performed studies. The liver effects induced by Cyclopentasiloxane were consistent with Cyclopentasiloxane as a weak “phenobarbital-like” inducer of xenobiotic-metabolizing enzymes and these effects are considered to be an adaptive response. Mechanistic studies to elucidate the mode-of-action for uterine tumor induction suggest an interaction of Cyclopentasiloxane with dopamine signal transduction pathways altering the pituitary control of the estrus cycle.
CHEMICAL IDENTITY, STRUCTURE, MANUFACTURE, AND USES
At ambient temperature, Cyclopentasiloxane is an odorless and colorless liquid that is used primarily as a chemical intermediate in the production of polydimethylsiloxane silicone polymers. To a lesser extent, D5 is used in blending and formulating a variety of personal care products, including shampoos, skin creams, cosmetics, and deodorant, and as a solvent in commercial dry cleaning products and industrial cleaning fluids. These uses in silicone polymers and in dry cleaning do not result in the release of significant amounts of Cyclopentasiloxane to the environment. Therefore, the most important use of Cyclopentasiloxane from the perspective of human and ecosystem exposure is in personal care products. In 2004, personal care product use of Cyclopentasiloxane in Europe and the United Kingdom was approximately 21 million kg.
Siloxanes, including Cyclopentasiloxane, possess characteristics of both organic compounds and silicates. Their properties arise from the unique chemistry of the Si–O bond and the influences of the organic substituents at the Si atom, CH3 in this case. If a chemical has unusual structural features or properties, as is the case with Cyclopentasiloxane, quantitative structure-activity relationships(QSARs) must be used cautiously. The user must verify that the chemical is within the domain of QSARapplicability. Ultimately, there is no substitute for accurate and consistent empirical physical, chemical, and degradation properties data, but valid QSAR models can be beneficial for identifying questionable measurements.
The high vapor pressure and low water solubility of Cyclopentasiloxane entail a high air-water partition coefficient (KAW) >1000. A high KAW suggests that Cyclopentasiloxane will prefer to accumulate in the atmosphere rather than aquatic systems. The volatilization half-life from the water was estimated to 2 hours in a river and 183 hours in a shallow lake. However, preferential distribution out of aqueous phases may be ameliorated due to adsorption to organic carbon.. The same model showed that Cyclopentasiloxane is present in the atmosphere throughout the Northern Hemisphere, with high concentrations at high latitudes. The model predictions were confirmed with measurements of Cyclopentasiloxane concentrations at Svalbard, clearly proving that Cyclopentasiloxane is subject to long-range atmospheric transport (LRAT). The concentrations measured in the Arctic are high compared to many other organic contaminants, ranging from 0.14-4 ng/m3. Despite these high concentrations, the potential for deposition to surface water and soil is low due to the high air/water partition coefficient and low octanol/air partition coefficient. Considerable concentrations of cyclic volatile methyl siloxanes (cVMS) have been reported in surface media in the Antarctic, but the validity of these data has been questioned.
Abiotic and biotic degradation
Cyclopentasiloxane has a hydrolysis half-life of 315 days at pH 7 and 12 °C (freshwater), and 64 days at pH 8 and 9 °C (marine water), and is not readily biodegradable (in addition, hydrolysis might be reduced by adsorption to organic matter and particulates). The hydrolysis rate is dependent on the pH and temperature, with a minimum near-neutral pH and an increased rate at lower and higher pH. Additionally, the hydrolysis rate decreases with decreasing temperature. The main degradation product is believed to be dimethylsilanediol, which may undergo further degradation to carbon dioxide and silicic acid, and/or silica (ECHA 2015). Cyclopentasiloxane shows high persistence in sediment with degradation half-times of >1200-3100 days and is expected to be longer at lower temperatures. Cyclopentasiloxane meets the criteria for persistent and very persistent (vP) in water and sediment.
It will reduce the oily feeling of heavy emollients such as Shea Butter. It is an excellent emollient for “oil free” moisturizers. In addition to its mild conditioning effect in hair care, it facilitates wet-dry combing.
INCI Name: Cyclopentasiloxane
Other names: Decamethylcyclopentasiloxane.
Appearance: Colorless liquid
Cosmetic applications: Antiperspirants, deodorants, hair sprays, cleansing creams, skin creams, lotions and stick products, bath oils, sun and shaving products, make-up and nail polishes.
Decamethylcyclopentasiloxane (D 5), Cyclopentasiloxane
an organosilicon compound, formula [(3 with CH) 2 SiO] 5. Colorless Usage The compound is classified as a cyclomethicone. Such liquids are often used in cosmetics such as deodorants, sunscreens, hair sprays, and skin care products. It is becoming more common in conditioners as it makes it easier to brush the hair without breaking it. It is also used as part of silicone-based personal lubricants. Cyclopentasiloxane is considered an emollient. Approximately 70% of the volume used in consumer products in Canada was antiperspirants and 20% hair care products. 10,000--100,000 tons of Cyclopentasiloxane per year in the European Economic Area
it is produced and / or imported.
Production and polymerization Cyclopentasiloxane commercially
is produced. Hydrolysis of dichloride produces a mixture of cyclic dimethylsiloxane and polydimethylsiloxane. From this mixture, D cyclic siloxanes 5 can be distilled off. In the presence of a strong base such as KOH, the polymer / ring mixture stabilizes and allows complete conversion to more volatile cyclic siloxanes: N / 5 [(CH 3) 2 SiO] N → N [(CH 3) 2 SiO] 5 D 4 and D 5 are also precursors to polymer. The catalyst is again KOH.
Hazard identification
Classification of the substance or mixture
Not a dangerous substance or mixture according to Regulation (EC) No 1272/2008.
Label elements
Not a dangerous substance or mixture according to Regulation (EC) No 1272/2008.
2.3 Other damages - none
First aid measures
Description of first aid measures
General recommendation
Consult the doctor.
In case of inhalation
In case of inhalation, remove casualty to fresh air. If breathing has stopped, give artificial respiration. Consult the doctor.
In case of skin contact
Wash off with soap and plenty of water. Consult the doctor.
In case of eye contact
As a precaution, apply water to eyes.
If swallowed
Do not induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult the doctor.
Most important symptoms and effects, both acute and delayed
Known symptoms and effects are stated on the label.
Indication of any immediate medical attention and special treatment needed.
Overview
IDENTIFICATION: Decamethylcyclopentasiloxane is a colorless liquid. It is slightly soluble in water.
USE: Decamethylcyclopentasiloxane is an important commercial chemical that is used in antiperspirants, hair preparations, cosmetics and car wax products. It is also used to make silicone chemicals. EXPOSURE: Workers who use or produce decamethylcyclopentasiloxane may breathe in vapors or have direct skin contact. The general population is exposed through skin contact when using cosmetics, deodorants and car wax containing decamethylcyclopentasiloxane. Exposure can occur through inhalation from breathing in vapors from these products. Women receiving silicone breast may also be exposed to decamethylcyclopentasiloxane. If decamethylcyclopentasiloxane is released to air, it will be broken down by reaction with other chemicals. If released to water or soil, it is expected to bind to soil particles or suspended particles. Decamethylcyclopentasiloxane is not expected to move through soil. It is expected to move into air from wet soils or water surfaces. However, binding to soil and suspended particles may slow this process. Decamethylcyclopentasiloxane is not expected to be broken down by microorganisms, but can be broken down by soil ingredients and it may build up in tissues of aquatic organisms.
USES
*General adhesives and binding agents for a variety of uses
*Used to prevent adhesion
*Additives to reduce friction
*Products used to care for apparel (e.g., she polish, products to repair footwear or leather, waterproofing sprays, etc.)
*Generally related to automobiles or their manufacture, used when automotive care or automotive component are not applicable (e.g. auto fuel, GPS units), or detailed information is not known
*Relatived to the maintenance and repair of automobiles, products for cleaning and caring for automobiles (auto shampoo, polish/wax, undercarriage treatment, brake grease)
*Subcategory of beverage, food for human consumption
*Various types of paint for various uses, modifiers included when more information is known
*Related to the building or construction process for buildings or boats (includes activities such as plumbing and electrical work, bricklaying, etc)
*Materials used in the building process, such as flooring, insulation, caulk, tile, wood, glass, etc.
*Fillers for paints, textiles, plastics, etc
*Insulating materials to protect from noise, cold, etc (such as used in homes or buildings), insulating materials related to electricity
*Casting agents or molding compounds for plastics, sand, or metals
*Modifier used for chemical, when chemical is used in a laboratory
*Related to products specifically designed for children (e.g. toys, children's cosmetics, etc)*
*Related to all forms of cleaning/washing, including cleaning products used in the home, laundry detergents, soaps, de-greasers, spot removers, etc; mod
*Detergents with wide variety of applications; modifiers included when known
*Construction General construction (as opposed to those things labeled building_construction)
*Detergents with wide variety of applications; modifiers included when known
*Drug product, or related to the manufacturing of drugs; modified by veterinary, animal, or pet if indicated by source
*Veterinary activities or veterinary drugs (modified by 'drug')
*Products used to care for apparel (e.g., she polish, products to repair footwear or leather, wterproofing sprays, etc.)
*Related to computers or the manufacturing of computers
*Generally related to automobiles or their manufacture, used when automotive care or automotive component are not applicable (e.g. auto fuel, GPS units), or detailed information is not known
*Fillers for paints, textiles, plastics, etc
*Includes antifoaming agents, coagulating agents, dispersion agents, emulsifiers, flotation agents, foaming agents, viscosity adjustors, etc
*Fragrances or odor agents, can be used in home products (cleaners, laundry products, air fresheners) or similar industrial products; usage indicated when known; more specific modifiers included when known
*General fuels, fuel additives, motor/automotive fuels
*Impregnation materials and impregnation agents for various prodcts (wood, oils, grease, paper)
*Leather products, and products/chemicals used in the process of tanning and dressing leather
*Related to the manufcturing of pulp or paper products, or paper products in general
*Textiles used for clothing or furniture upholstery, processes related to textiles (e.g.
*Wood used as a building material, wood preservatives
*Generic lubricants, lubricants for engines, brake fluids, oils, etc (does not include personal care lubricants)
*If applied entry is related to the manufacturing process for the product, widely applied, modifiers often included (if not included, no additional information is known)
*General adhesives and binding agents for a variety of uses
*Generally related to automobiles or their manufacture, used when automotive care or automotive component are not applicable (e.g. auto fuel, GPS units), or detailed information is not known
*Materials used in the building process, such as flooring, insulation, caulk, tile, wood, glass, etc.
*Wood used as a building material, wood preservatives
*General term used only when the only information known from the source is 'chemical,' typically related to manufacturing of chemicals, or laboratory chemicals
*CYCLOPENTASILOXANE is used in cosmetics and toiletries.
*It is used as a vehicle and end blocking agent in antiperspirants and in aerosol products containing insoluble powders.
*Commonly used as volatile excipient in cosmetic products including antistatic, emollient, humectant, solvent, viscosity controlling and hair conditioning ... The main use of CYCLOPENTASILOXANE in cosmetic products is in skin care products, deodorants/antiperspirants, hair care products and make up products.
*Fuel additives; surface treatment, cleaning/washing agents; fillers; impregnation material; adhesives; binding agents; paints; laquers and varnishes; reprographic agents; softeners; surface active agents; process regulators.
*Intermediate in the manufacture of high molecular weight siloxane polymers. Carrier ingredient in personal care products; dry cleaning solvent.
Industry Uses
Adhesives and sealant chemicals
Intermediates
Lubricants and lubricant additives
Paint additives and coating additives not described by other categories
Solvents (which become part of product formulation or mixture)
Viscosity adjustors
Consumer Uses
Adhesives and sealants
Automotive care products
Cleaning and furnishing care products
Ink, toner, and colorant products
Paints and coatings
Personal care products
Plastic and rubber products not covered elsewhere
Chemical Properties
liquid
Uses
*A cyclic volatile methylsiloxane (cVMS) used in cosmetic and personal care products. Used in dermal exposure and inhalation toxicity study.
*Intermediate in the manufacture of high mol wt siloxane polymers. Carrier ingredient in personal care products; dry cleaning solvent.
cyclopentasiloxane is incorporated into a formulation for its emollient and solvent activity.
*Octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane are major industrial products, which are either marketed as such or used for the production of polydimethylsiloxanes.
Application
It widely used in cosmetics and body care products, Such as skin care, sunscreen,makeup, hair conditioning products, good compatibility with most of the alcohol and other cosmetic solvents. Be directly used as the carrier, the main raw material, also can be used as an additive; and be used in aqueous systems by the method of Emulsification.
Cyclopentasiloxane is an organosilicon compound with the formula [(CH3)2SiO]5. It is a colorless and odorless liquid that is slightly volatile. The compound is classified as a cyclomethicone. Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. It is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage. It 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.
Cyclopentasiloxane is a silicone compound with the formula [(CH3)2SiO]5. It is a colorless, odorless liquid that has a low viscosity. It gives a silky and slippery feel when applied to skin and hair. It is mainly used in antiperspirants, sun-block creams, hair conditioners and skin care products.
CYCLOPENTASILOXANE is classified as :
Emollient
Hair conditioning
Skin conditioning
Solvent
The Cyclopentasiloxane, with the cas register number 541-02-6, has its systematic name of 2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane. This is a kind of liquid, and incompatible with strong oxidizing agents. And its product categories are various, including siloxanes;organics;si (classes of silicon compounds);si-o compounds;organometallic reagents;organosilicon. As to its usage, it is widely applied in the cosmetic and personal nursing care products.
The characteristics of Cyclopentasiloxane are as follows: (1)#H bond acceptors: 5; (2)Polar Surface Area: 46.15; (3)Index of Refraction: 1.427; (4)Molar Refractivity: 98.78 cm3; (5)Molar Volume: 384.3 cm3; (6)Polarizability: 39.16 ×10-24 cm3; (7)Surface Tension: 19 dyne/cm; (8)Density: 0.96 g/cm3; (9)Flash Point: 95.6 °C; (10)Enthalpy of Vaporization: 42.81 kJ/mol; (11)Boiling Point: 210 °C at 760 mmHg; (12)Vapour Pressure: 0.285 mmHg at 25°C; (13)Exact Mass: 370.093957; (14)MonoIsotopic Mass: 370.093957; (15)Topological Polar Surface Area: 46.2; (16)Heavy Atom Count: 20; (17)Complexity: 258.
Use of Cyclopentasiloxane: Cyclopentasiloxane reacts with chloro-dimethyl-silane to produce Cyclopentasiloxane, with the following condition: reagent: H2O; catalytic agent: SO2; solution: hexane; yield: 45%; other condition: ambient temperature.
While dealing with Cyclopentasiloxane , you should be very cautious. For being a kind of harmful chemical, it may cause damage to health, and it has limited evidence of a carcinogenic effect. Therefore, you had better wear suitable protective clothing while using this chemical and remember not to breathe dust.
Cyclopentasiloxane description
Cyclopentasiloxane is a chemical substance that is a colorless, transparent liquid. The molecular formula is C10H30O5Si5
Cyclopentasiloxane Usage
Widely used in cosmetics and body care products, it has good compatibility with most alcohols and other cosmetic solvents.
1. Hair care: Reduce drying time, remove thick sense, comb-wet
2. Skin care: No irritation, no blocking, easy to smear, reduce greasy feeling, rapid absorption, pigment deposition, smooth feeling/softening effect
3. Antiperspirant / deodorant: Reduce sticky feeling, has dry feeling in use, no imprinting on clothing surface, increase slippery feeling.
Under the acid, base catalyzed ring-opening to form silicone high polymer silicone oil, can also be directly used as silicone rubber filler treatment agent and cosmetic raw materials.
How to use Cyclopentasiloxane?
It can be used directly as a carrier, a main raw material, or as an additive; it can also be used in an aqueous system by emulsification.
The recommended addition amount of this product is: 0.5-10%, and the customer can decide according to the actual use of the product
Decamethylcyclopentasiloxane Storage
1.Stored in cool, dark, ventilated and dry place away from fire and heat. The storage place temperature should be not higher than 30℃;
2. No mixed storage with oxidants, acids and alkali. The storage site should be equipped with appropriate types and quantities of fire-fighting equipments;
3. Prohibit the use of the mechanical equipments and tools that are easy to produce spark in the operation of this product. Handle gently to avoid spillage caused by container damage.
Cyclopentasiloxane is a volatile silicone that is also called Silicone D5. It does not accumulate on the hair or skin and gives consumers the advantage of this family without its disadvantages: soft touch, non-greasy and lubricating properties.
In beauty products, cyclopentasiloxane is mainly used as a conditioner, delivery agent, lubricant and solvent. 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 and slippery feeling to the touch and acts a mild water repellent by forming a protective barrier on the skin. It can also fill in fine lines and wrinkles, giving the face a temporary “plump” look.
What is cyclopentasiloxane?
Cyclopentasiloxane in effect, is atype of silicone. It’s also used as a lubricant and emollient, as it helps the skin and hair absorb heavier, larger molecular weight ingredients. Plus it helps to give products a smooth, silky feel. Also known as decamethylcyclopentasiloxane, thankfully, it’s often referred to as simply, D5. It’s colourless, odourless and is always found in liquid form.
You may be aware of the use of silicones in hair care products. They help to seal in moisture by forming a protective barrier over the hair shaft. You might have also heard of certain big brand name shampoos and conditioners containing silicone, that coat the hair. This has the benefit of making the hair feel soft and shiny.
But it also has the unwanted side effect of pushing water away from the hair. This then means that the hair becomes dehydrated and we all know what that means - dry, brittle hair that’s prone to breaking and turning frizzy.
So in order to prevent this dryness and frizziness, we should steer well clear of the products that promise to do the opposite, but in fact, cause the dryness and frizziness! (A classic case of short term gains - glossiness - leading to long term disadvantages.)
Silicones, such as cyclopentasiloxane, are also used in skin care products. In fact, cyclopentasiloxane is used in countless skin care and makeup products.
What are the benefits of cyclopentasiloxane?
Cyclopentasiloxane hasmany benefits. Since it makes products spread easily, it’s added to moisturisers and foundations to help them glide onto the skin without pulling it. It’s also a very lightweight type of silicone, allowing it to feel effortless on the skin. When added to heavier weight foundations and products with heavier oils, it helps to disperse them across the skin too.
It’s also used in spray products that need to dry quickly, such as hair spray and spray on deodorants and antiperspirants. This is because cyclopentasiloxane is very volatile, meaning that it quickly evaporates into the air, leaving behind the active ingredients.
What’s more, cyclopentasiloxane is also very cheap to use and add to product formulations...
What are the side effects of cyclopentasiloxane?
As is often the case with these amazing sounding skin care ingredients, cyclopentasiloxane also has a down side.
Although most skin types can tolerate it, it has been linked with a slower, more sinister side effect than skin irritation. Cyclopentasiloxane is thought to be an endocrine disruptor. This means that some studies have shown it can alter the way our hormones work.
The Environmental Working Group, or EWG, have found a low level risk thatcyclopentasiloxane could be an endocrine disruptor. However, in balance, the Cosmetic Ingredient Review Expert Panel says that this is only likely atconcentrations higher than in most skin care products.
It’s also thought that due to the fact that cyclopentasiloxane evaporates away from the skin, rather than absorbing deeply into it, that itposes less of a risk. Also, if it is absorbed by the body by inhaling it, it’s eliminated from the body in the urine.
But, we’re of the mind that if something has a question mark hovering above it, it's probably best left alone.
Cyclopentasiloxane (D5) (CAS n. 541-02-6, EC 208-764-9) is widely used in cosmetic
products due to its unique functions as antistatic, emollient, humectant, solvent, viscosity controlling and hair conditioning agent.
Cyclopentasiloxane (its full chemical name is decamethylcyclopentasiloxane), commonly known as D5, is a chemical that belong to the group of cyclomethicones aka methyl siloxanes.
Siloxanes are found in lots of hair care and skin care products as conditioners that leaves hair and skin with a soft, silky, and moist feeling.
You can identify siloxanes in cosmetics by looking for the words with “-siloxane” or “-methicone” in the ingredient list.
Cyclopentasiloxane (D5) is an odorless, colorless liquid. It is also used in the production of silicone polymers and may also be used as a dry-cleaning solvent and in industrial cleaning products.
Why is cyclopentasiloxane used in cosmetics?
Cyclopentasiloxane (or CPS for short) is one of many types of silicones. In general, silcones are known for their ability to lubricate, waterproof and provide shine. There are many types of silcones – some have a very heavy, sticky consistency and others are very lightweight. CPS is a water-thin so it’s very good at dispersing thicker, greasier silicones. For this reason it’s often used in combination with dimethicone. It is also volatile, which means it will evaporate. So, not only does it help spread heavier silicones but it doesn’t leave your hair feeling weighed down after it’s done.
What is Cyclopentasiloxane?
Cyclopentasiloxane, also known as CSP, is synthetic compound, in cyclic siloxane group. Cyclopentasiloxane in normal terms is a silicone. Cyclic siloxanes are mainly colorless, odorless liquid with low viscosity. It is a low-cost option for vegetable oil or any other animal source. It also acts as a volatile solvent.
Use & Benefits:
Siloxanes are preferred over other volatile alternatives because it does not leave the skin dry. It forms a thin film over skin or hair. This film is non-greasy, but at the same time, water repellent does not let moisture evaporate and provide the emollient effect. It also spreads more evenly and faster even when rubbed over the skin or hair surface. It also helps improves hair appearance, shine, and manageability. Because of the film, the environmental effect on skin /hair can be avoided, in other words, it also produces a protective film over skin and hair. It is used in skin products, sunscreens, color cosmetics, hair care, lotions, facial make-up, and rinse-off products.
Although it creates a film over the hair, this film is not always desirable like many silicons as it can make the hair feel greasy and may if even take a cleansing shampoo that strips the hair of oils to get rid of the film feel to the hair (this is usually the case for curlier hair types). This is however determined by how much of the silicon is added to the product. If in the formula it is close to the top of the ingredients, then this will indicate that there is a high percentage and so most likely give that film feel.
The purpose of silicons in hair conditions or shampoos is for manageability and ease of combing.
The EU in 2018 put a restriction on the use of Cyclopentasiloxane to 0.1% in wash-off products as use above this was reported to accumulate in the water supply. Prior to this, there was already controversy on the environmental and potential health risk Cyclopentasiloxane could cause.
EWG has classified this ingredient as safe to use in its intended concentration. It has also not been recognized as an endocrine disruptor. It is used in skin products, sunscreens, color cosmetics, hair care, lotions, facial make-up, and rinse-off products.
The purpose of silicons in hair conditions or shampoos is for manageability and ease of combing.
Cyclopentasiloxane, CAS # 541-02-6, is a volatile, low viscosity cyclopentasiloxane fluid used in skincare, suncare, color cosmetics, hair care, and antiperspirant / deodorant applications.
Product description
Cyclopentasiloxane (D5) is a clear fluid of low viscosity and high volatility and is one of the most common cost-effective ingredients used in personal care products today.
The sensory perception and responses shown by D5 may be incorporated in various products in cosmetics: Sun Care products, Deodorants, Shower Gels, Facial Cleanser or Foams and After Shave Preparations.
Cyclopentasiloxane can give the right balance between volatility and spreading. Can be used as a volatile carrier and is highly compatible. D5 has a low surface tension and makes very stable formulations. Low usage levels required.
Cyclopentasiloxane (D5) is used in hundreds of cosmetics. In the past, there was controversy about its potential health and environmental risks. But the Cosmetic Ingredient Review Expert Panel considers it safe to use in cosmetics. However, in early 2018 the European Union introduced restrictions on D5 use in cosmetic products that are intended to be washed off before evaporation. Concentrations above 0.1% in wash-off products were determined to have a risk of accumulating in the water supply.
Cyclopentasiloxane might not exactly be an ingredient on your radar (we'll be the first to admit it wasn't on ours a short time ago either), but we'd be willing to bet you've heard of silicones. You see, cyclopentasiloxane is a form of silicone that's pretty commonly used these days in skincare and haircare products. And as you know, the topic of silicones in your products is a highly debated one.
Benefits of Cylcopentasiloxane
Although cyclopentasiloxane has minimal benefits specific to the skin, it does have notable sensory properties and also helps in how the product functions.
Spreads easily: Silicones are known for their slippery glide and smooth feel. Cyclopentasiloxane gives products a silky smooth texture that applies easily and leaves a non-greasy finish.
Is inexpensive: Cyclopentasiloxane is cheaper than other similar silicones, your products that contain it will also be more affordable as a result.
Evaporates quickly: Cyclopentasiloxane is volatile, so it's often included in product formulations because it allows the products to dry faster.
Is lightweight:Some silicones are heavy, but this one is particularly lightweight and used when a lighter feel is desired. This trait is especially helpful in haircare products so as not to weigh down the hair strands.
Disperses heavier ingredients: Cyclopentasiloxane works well when combined with heavier oils or silicones because it makes them easier to spread and provides a nice feel to the skin.
Seals hydration: Cyclopentasilxone forms a seal or barrier on the skin. This barrier protects against transepidermal water loss (TEWL), which can lead to inflammatory conditions. Cyclopentasiloxane also works similarly when used on the hair by coating the hair shaft. The molecular structure of silicones (large molecules with wide spaces between each molecule) means that the barrier they form is permeable, preventing the skin from "suffocating".
Cyclopentasiloxane is safe for daily use, but how frequently and how much of the product containing the ingredient you should use depends on the product in question. For instance, if you're using it in the form of a moisturizer (one of its common vehicles), apply it after your toners and serums to seal the products underneath it and improve absorption.
