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D5 SILOXANE

D5 SILOXANE = DECAMETHYLCYCLOPENTASILOXANE

CAS Number: 541-02-6
EC Number: 208-764-9
MDL Number: MFCD00046966
Chemical formula: [(CH3)2SiO]5

D5 siloxane (Decamethylcyclopentasiloxane) is one of the most abundant compounds measured in urban indoor and outdoor air in developed countries. 
Used in many personal care products, D5 siloxane's concentration measured outdoors is correlated with population density. 
Additionally, particulate matter from urban areas is richer in silicon than less populated areas. 
The vast majority of the D5-siloxane used escapes into the atmosphere and, once there, D5 siloxane's major loss source is to the hydroxyl radical. 


Experimental and computationally simulated environmental data from chamber experiments of D5 siloxane and OH provide an understanding of aerosol yield and chemistry under relevant urban conditions and give insight into the effect of volatile chemical products on the production of secondary organic aerosol (SOA). 
Aerosol yields and composition as a function of NOx concentration are shown.


The name Siloxane is derived from Silicon, Oxygen and alkane. 
They are a family of chemical substances composed of primarily of silicon. 
Usually found in cosmetic products, (makeup, crème, deodorant…) and in cleaning as a whole, in paint, etc. 
They are used for they particular chemical properties: they are odorless, colorless,  non-greasy, easy to apply and dry rapidly.


This family encompasses multiple categories of substances: Cyclotetrasiloxanes (D4), Cyclopentasiloxanes (D5) and Cyclohexasiloxanes (D6). 
The term “silicone” can also be used to refer to siloxanes.
The monitoring of scientific advances relating to the use of siloxanes and their impact on human and environmental health is an important topic in the cosmetics industry. 


Therefore, support from a specialized laboratory will allow you to adapt your production procedures to stay in line with changes in regulations.
Solution: to reliably analyze and quantify the presence of D4 and D5 siloxanes in your finished products to asses the risk they pose
D5 siloxane is an organosilicon compound with the formula [(CH3)2SiO]5. 
D5 siloxane is a colorless and odorless liquid that is slightly volatile. 


D5 siloxane is classified as a cyclomethicone. 
Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. 
D5 siloxane is member of cyclomethicone, which are a group of liquid methyl siloxanes that have low viscosity and high volatility. 
Cyclomethicones are cyclic in structure with a monomer backbone of one silicon and two oxygen atoms bonded together. 


D5 siloxane is used in cosmetic and personal products as a skin emollient.
D5 siloxane, also known as cyclopentasiloxane, decamethyl-, is an industrial chemical.
D5 siloxane is a volatile polydimethyl cyclosiloxanes, mainly by decamethyl cyclopentasiloxane composition. 
D5 siloxane is clear, odorless, basically odorless, non-greasy.


D5 siloxane, also known as D5 and D5, is an organosilicon compound with the formula [(CH3)2SiO]5. 
D5 siloxane is a colorless and odorless liquid that is slightly volatile.
D5 siloxane is classified as a cyclomethicone. 
D5 siloxane is a silicone regularly used in cosmetic products. 


D5 siloxane commonly found in medical implants, sealants, lubricants, and windshield coatings.
D5 siloxane  is colorless, odorless, non-greasy, and water-thin. 
D5 siloxane doesn’t get absorbed into the skin. 
Rather, D5 siloxane evaporates quickly away from it. 


This property makes D5 siloxane a useful ingredient in cosmetic products that need to dry quickly, like antiperspirants and hair sprays.
D5 siloxane 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.
The basic structure common to all cyclomethicones is a cyclic backbone of siloxane units (i.e., silicon and oxygen with molecules of carbon and hydrogen attached, all very common elements found in nature).  


Shorthand nomenclature is based upon the number of siloxane groups in the cyclic structure.  
Thus, D5 siloxane (also known as cyclopentasiloxane or just D5) has five of these groups.
The cyclosiloxanes octamethylcyclotetrasiloxane (D4), D5 siloxane , and dodecamethylcyclohexasiloxane (D6) are cyclic volatile methyl siloxane (cVMS) substances with four, five, and six siloxane groups, respectively. 


Their use in cosmetics is one of their most important applications. 
D5 and D6 are commonly used in cosmetics as emollients, hair and skin conditioning ingredients, and solvents. 
The ingredients can be used in hair conditioning products where the product is washed off when used or in skincare products, personal deodorants, and colour cosmetics where the product is left on the skin. 


Restrictions currently apply where D4 and D5 are rinsed off; the new proposed restriction will apply to all leave-on uses and extend the rinse-off restriction to D6.
D5 siloxane provides high accuracy thermodynamic properties for siloxane D5 (decamethylcyclopentasiloxane, C10H30O5Si5, MW=370.7697 g/gmole, CAS#=107-52-8) using the Fundamental Equation of State.
D5 siloxane is a volatile cylcosilloxane which is a basic material for wide range of cosmetics and body care products. 


D5 siloxane is good compatible with most of the solvents.
Compatible with wide range of cosmetic ingredients
Non-greasy and freely dredge
Colorless, odorless and nontoxic


D5 siloxane also is an odorless, colorless non-oily volatile siloxane fluid used primarily to make other silicone materials. 
D5 siloxane is an odorless, colorless non-oily fluid used as an ingredient in personal care products and dry cleaning. 
In personal care products, D5 siloxane acts as a “carrier,” allowing products to spread smoothly and easily, providing a silky, luxurious feel during application. 


In dry cleaning, D5 siloxane brings detergent to clothes and rinses away suspended dirt and oils trapped by the detergent.
D5 siloxane is also among the most extensively studied materials used in consumer and industrial applications. 
D5 siloxane is known for being able to evaporate and dry quickly. 
D5 siloxane are also known to repel water and glide easily. 


This is why D5 siloxane are commonly used as ingredients in lubricants and sealants.
D5 siloxane 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.
D5 siloxane can be found in a wide range of personal care products. 


D5 siloxane sometimes appears on a label as decamethylcyclopentasiloxane or D5. 
D5 siloxane may also be put under the broader category name of cyclomethicone.
D5 siloxane is different from another siloxane known as dimethicone or polydimethylsiloxane (PDMS).
D5 siloxane is a general term describing an individual and/or a mixture of cyclic siloxane materials that have many uses and are found in a variety of consumer products. 


These materials are derived from the natural elements silicon and oxygen.
D5 siloxane create many of the positive qualities we associate with personal care products: luxuriant texture, silky smoothness, luster and smooth application. 
D5 siloxane help make personal care products non-stinging and non-irritating. 
For example, silicones reduce the white residue and tacky feel of antiperspirants and help “long-lasting” makeup retain its color and luster. 


With D5 siloxane, shampoos and conditioners have better shine; wetting and spreading qualities provide for smooth and even application of makeup, lotions, sunscreens and cleansers.
Definition of D5 siloxane: any of various compounds containing alternate silicon and oxygen atoms in either a linear or cyclic arrangement usually with one or two organic groups attached to each silicon atom.


D5 siloxane is a volatile cylcosilloxane which is a basic material for wide range of cosmetics and body care products. 
D5 siloxane is good compatible with most of the solvents.
D5 siloxane , a synthetic substance, is made up of silicone and oxygen. 
Sometimes, elements like hydrogen and carbon are also used. 


They are all natural substances, but D5 siloxane undergoes chemical processing before D5 siloxane is used in cosmetic and skincare products.
D5 siloxane is a staple ingredient used in cosmetics. 
The chemical formula for D5 siloxane is C10H30O5Si5. 
D5 siloxane is a non-greasy silicone that is colorless, odorless, and water-thin. 


D5 siloxane 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. D5 siloxane also has lubricating properties and feels silky smooth when applied to hair and skin.
D5 siloxane is a volatile polydimethylcyclosiloxane, mainly composed of decamethylcyclopentasiloxane. 
D5 siloxane is colorless and transparent liquid, with low flow point and fast reaction speed. 


The name “cyclopentasiloxane” is crazy hard to say as is its other name “decamethylcyclopentasiloxane,” but the good news is that it’s also referred to as “D5 siloxane.” 
D5 siloxane is actually a type of silicone that’s regularly used in skincare and haircare products. 
D5 siloxane is specifically part of a small silicone group: cyclomethicones. 


According to clinical studies and reports, D5 siloxane have been deemed safe for cosmetic ingredient uses as they are not significantly absorbed through the skin.
However, as a silicone, they are not a natural ingredient, so if you only use natural on your face and skin, you may want to double-check the ingredients in your products.
This colorless, odorless compound is mainly used as an emollient to help smooth out beauty product creams and gels. 


D5 siloxane can also create a protective barrier on your skin once applied, which may help keep your skin safe from toxins, bacteria, germs, pollution, and other yuckiness.
Commonly labelled as a “cyclomethicone” or “cyclosiloxane”, D4 and D5 siloxane (octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane repectively) are common ingredients in the cosmetic industry and as raw materials in the production of silicone polymers. 


In cosmetics, D4 and D5 siloxane are used in small quantities to help with keeping moisture in hair and skin. 
D5 siloxane also helps with spreading the product on evenly.
D5 siloxane is a volatile polydimethyl cyclosiloxanes, mainly by decamethyl cyclopentasiloxane composition. 
D5 siloxane is clear, odorless, basically odorless, non-greasy.


D5 siloxane, also known as D5 and D5, is an organosilicon compound with the formula [(CH3)2SiO]5. 
D5 siloxane is a colorless and odorless liquid that is slightly volatile.
D5 siloxane is a cyclic siloxane, that has a silicon-oxygen bond in a cyclic arrangement and methyl groups attached with the silicon atom.
D5 siloxane is an organosilicon compound with the formula [(CH3)2SiO]5. 


D5 siloxane is a colorless and odorless liquid that is slightly volatile. 
D5 siloxane is classified as a cyclomethicone. 
D5 siloxane is compatible with many cosmetic ingredients, even some waxes, fatty acids, fatty acid esters and non volatile silicones. 


D5 siloxane features good solubility in most anhydrous alcohols and in many cosmetic solvents.
1.    Anti-perspirants, deodorant: 3-10%;
2.    Hair Care: 1-5%;
3.    Skin Care: 3-10%;
4.    Perfume: 0.5-3%.


D5 siloxane is an organosilicon compound.
D5 siloxane is member of cyclomethicone, which are a group of liquid methyl siloxanes that have low viscosity and high volatility. 
D5 siloxane are cyclic in structure with a monomer backbone of one silicon and two oxygen atoms bonded together. 


D5 siloxane is a deuterated version of Decamethylcyclopentasiloxane (D212440). 
10,000–100,000 tonnes per year of D5 siloxane is manufactured and/or imported in the European Economic Area. 
Atmospheric emissions of D5 siloxane in the Northern Hemisphere were estimated to 30,000 tonnes per year.


D5 siloxane is a fluid exhibiting low surface tension. 
D5 siloxane has lubricating properties combined with volatility characteristics. 
D5 siloxane imparts soft silky feel to the skin leaving no oil residue or build up. 
D5 siloxane is non-greasy, detackifying and spreads evenly. 


USES and APPLICATIONS of D5 SILOXANE:
-D5 siloxane are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. 
-D5 siloxane is becoming more common in hair conditioners, as D5 siloxane makes the hair easier to brush without breakage. 
-D5 siloxane is also used as part of silicone-based personal lubricants. 
-D5 siloxane is considered an emollient. 


-In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products.
-A base fluid in a number of personal care products, with excellent spreading, easy rubout and lubrication properties together with unique volatility characteristics.
-Antiperspirants, deodorants, hair sprays, cleansing creams, skin creams, lotions and
stick products, bath oils, suntan and shaving products, make-up, nail polishes.


-In sticks, D5 siloxane has the right balance between volatility and spreading.
-D5 siloxane is an odourless, colourless liquid mostly used as an intermediate or basic raw material in the production of silicone rubbers, gels and resins. 
When used as an intermediate during the manufacturing process, virtually all D5 is consumed with only a tiny amount remaining in final products.


-D5 siloxane can be added as an ingredient in silicone mixtures used in cosmetic applications such as skin creams and sunscreen, where D5 siloxane may be labelled “cyclomethicone” or “cyclopentasiloxane”. 
-D5 siloxane can also be used as a dry-cleaning solvent in closed systems, which significantly limits exposure to workers, consumers and the environment.


-D5 siloxane is used in dry cleaning and in industrial cleaning as an alternative to tetrachloroethylene.
-D5 siloxane is a cyclic siloxane used in the formulation of consumer products as well as an industrial intermediate. 
-D5 siloxane (D5; CAS No. 541-02-6) is a precursor in the production of siloxane polymers for industry and medicine and is a carrier ingredient in many toiletries and cosmetics.


-D5 siloxane is found or used in the manufacture of a wide variety of products.
The predominant use of D5 siloxane worldwide and in Canada is in blending and formulating consumer products. 
-D5 siloxane is also used in manufacturing silicone polymers. 
-D5 siloxane is used in personal care products such as hair/skin care products, antiperspirants and deodorants.


-Silicone polymers that may contain residual amounts of D5 siloxane (from the manufacturing process) are used in biomedical applications and have also been approved as active and non-active ingredients in pharmaceuticals in Canada.
-D5 siloxane are used in industrial processes (for example, as surfactants in certain pesticide products and as defoamers), in lubricants, cleaning products, sealants, adhesives, waxes, polishes and coatings. 


-D5 siloxane is commonly used as volatile excipient in cosmetic products. 
-An increasing number of commercial dry cleaners in Canada use D5 siloxane as a dry-cleaning fluid.
-D5 siloxane (CAS n. 541-02-6, EC 208-764-9) is widely used in cosmetic products due to D5 siloxane's unique functions as antistatic, emollient, humectant, solvent, viscosity controlling and hair conditioning agent. 


-D5 siloxane is largely used in many cosmetic products due to: low surface tension which allows it to spread rapidly on skin and hair, D5 siloxane's hydrophobicity, D5 siloxane's volatility (D5 siloxane evaporates from skin or hair within 4-12 hours after application) and D5 siloxane's stability (low reactivity in acidic or aqueous products).
Due to these properties, D5 siloxane can have many different functions in cosmetic products including antistatic, emollient, humectant, solvent, viscosity controlling and hair conditioning. 


-D5 siloxane is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage. 
-D5 siloxane is also used as part of silicone based personal lubricants. 
-D5 siloxane is considered an emollient. 
-D5 siloxane 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. 


-D5 siloxane is 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.
-D5 siloxane is a cyclic siloxane used in the formulation of consumer products as well as an industrial intermediate. 


-Our toothpastes, moisturisers and deodorants on one hand and burgers and fries on the other – have one thing in common: They are all composed of D5 siloxane.
-D5 siloxane is widely used in cosmetics and body care products, such as skin care, sunscreen, makeup, hair conditioning products.
D5 siloxane can be directly used as the carrier or the main raw material, also can be used as an additive in aqueous systems through emulsification.


-D5 siloxane is used cleaning products, cosmetics, environmental, food and beverages, personal care
-D5 siloxane are widely used in the chemical industry and in process and power engineering.
-D5 siloxane is used in dry cleaning, electronics, and lubricants, and as a carrier ingredient in many toiletries and cosmetics. 
-D5 siloxane is also a precursor in the production of siloxane polymers for industry and medicine. 


-Application areas of D5 siloxane include detergents products, polishes (e.g. car cleaning products) and waxes, cosmetics and personal care products (PCPs), textile treatment products and dyes, adhesives and sealants, and laboratory chemicals. 
-D5 siloxane is used as an intermediate in industrial processes. 
-D5 siloxane is used in formulations of mixtures and/or re-packaging, in the production of chemicals, textiles and leather, as well as electronic and optical products.


-The major use of D5 siloxane is as an intermediate and as a monomer in the production of silicone polymers (in which D5 can remain as residual impurities). 
-D5 siloxane is used Antiperspirant / Deodorant, Cleansers, Creams, Color Cosmetics, Lotions, Serums, Sun Care, Conditioner (leave in), Styling Treatment


-D5 siloxane is also suitable as a conditioner that improves the structure of treated damaged hair after repeated permanent waving or oxidative dyeing.
-D5 siloxane is used for excellent spreading, fast evaporation leaving no residue or build-up, leaves a unique soft feel and lubricity; non-greasy feel, non-occlusive and non-irritating. 
-Used in conditioners, hair sprays, face wash, body wash, make-up, sun care, antiperspirants, and deodorants.


-D5 siloxane is used In Cosmetics And Body Care Product, Such As Skin Care, Sunscreen And Other Cosmetic Solvents.
-D5 siloxane is a precursor in the production of siloxane polymers for the industry and medical field. 
-D5 siloxane is a carrier ingredient in many toiletries and cosmetics. 
-D5 siloxane is also used in dry cleaning, electronics, and lubricants.


-D5 siloxane are used as monomers in the manufacture of silicone polymers and are therefore present as impurities in sealants. 
-D5 siloxane are also an ingredient in silicone mixtures used in cosmetic applications such as skin creams and deodorants.
-D5 siloxane is an excellent carrier for oils and greases and for active ingredients. 


-D5 siloxane can also be used as to clean various substrates where removal of greases, silicone fluids or waxes is important. Leaves a soft, silky feel in cosmetic formulations.
-D5 siloxane(D5) is the predominant cyclomethicone used in cosmetics and personal care products, primarily due to its excellent skin conditioning and hair conditioning properties. 
-D5 siloxane is also used as a solvent. 


-D5 and similar cyclomethicone ingredients are used in products where eventual complete evaporation of the siloxane carrier fluid is desired, such as deodorants and antiperspirants that need to coat the skin but not remain tacky afterward. 
Other important product performance benefits include facilitating a smooth texture and an even application. 
-D5 siloxane may also be found in sunscreens, shampoos, conditioners, moisturizers, lotions, etc.


-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.
-D5 siloxane is used as an ingredient in personal care and consumer products and in dry cleaning. In personal care products, D5 siloxane acts as a “carrier,” allowing products to spread smoothly and easily, providing a silky, luxurious feel during application. 
-In dry cleaning, D5 siloxane carries detergent to clothes and rinses away suspended dirt and oils trapped by the detergent. 
D5 siloxane does not interact with textiles and therefore helps maintain the quality and color of clothes that are dry cleaned.


-D5 siloxane are used in a staggering array of fields, including:
*Aviation and Aerospace   (adhesives and sealants)
*Construction   (sealants, adhesives, coatings)
*Dry Cleaning   (substitute for perchloroethylene)
*Electronics   (sealing, bonding, encapsulation)

*Health Care   (tubing, lubricants, softening and smoothing of topical meds)
*Household Products   (bakeware, cookware, polishes, cleaners)
*Personal Care Products   (improve texture, smoothness, and luster)
*Rubber   (aids in curing, molding, and manufacturing)

*Textiles and Leather   (helps fabrics retain shape, texture and resistance to abrasion, improves performance of dyes)
*Transportation  (coatings, improvements in durability, sealants, cushioning)


-D5 siloxane is widely used in cosmetics and body care products, such as skin care, sunscreen, makeup, hair conditioning products. 
-D5 siloxane can be directly used as the carrier or the main raw material, also can be used as an additive in aqueous systems through emulsification.
-D5 siloxane is used In Lubricants, Antifoaming Agents, And Hydraulic Fluids
-Some uses of D5 siloxane is formerly ingredients in personal care and cleaning items.


-Some commercial applications of these substances remain, including use in the production of electronics and in closed dry cleaning systems.
-D5 siloxane are used in cosmetics to soften, smooth, and moisten. 
D5 siloxane make hair products dry more quickly and deodorant creams slide on more easily. 
-D5 siloxane are also used extensively in moisturizers and facial treatments. 


-D5 siloxane can also be found in medical implants, water-repelling windshield coatings, building sealants and lubricants.
-D5 siloxane is widely used in cosmetics and body care products, D5 siloxane has good compatibility with most alcohols and other cosmetic solvents.
-Hair care: 
Reduce drying time, remove thick sense, comb-wet


-Skin care: 
No irritation, no blocking, easy to smear, reduce greasy feeling, rapid absorption, pigment deposition, smooth feeling/softening effect
-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.
-Because of D5 siloxane's many enriching properties, D5 siloxane is a common ingredient used in a variety of hair and skin care products. 
-D5 siloxane helps the products spread more evenly and dry quickly, thus providing all the benefits without weighing the skin or hair down. 
D5 siloxane also gives cosmetic products a silky texture.


-Skin care: 
The hydrating properties of Cyclopentasiloxane are great for the skin as D5 siloxane traps moisture, making the skin smooth and soft. 
D5 siloxane is used in lightweight products as D5 siloxane does not penetrate the skin but rather evaporates quickly. 
Further, D5 siloxane  skin care has anti-aging properties and is a great ingredient to be used in lotions


-Hair care: 
D5 siloxane is a great conditioner for hair because of its lubricating properties. 
D5 siloxane is commonly used in shampoos, hair conditioners, hair sprays, anti-frizz, and hair detangling products. 
D5 siloxane forms a layer on the hair, protecting and preventing it from damage while also allowing the product to spread easily and evenly


-Cosmetic products: 
D5 siloxane is used in makeup and makeup removers because it is non-comedogenic and does not block pores
-D5 siloxane is used Emollient, Hair conditioning, Skin conditioning
-D5 siloxane works great with heavier silicones or oils because the compound makes them easier to spread.
-D5 siloxane actually works well with most—if not all—types of ingredients. 


-D5 siloxane is used Hair detangling products, Waterproof mascara, Foundation, Hair spray, Shampoo, Body lotion
-D5 siloxane are used in some cosmetic products thanks to their unique sensory benefits and properties, as long lasting effect in lipstick. 
-D5 siloxane are smoothing: 
D5 siloxane give products like creams or make-up a silky, spreadable, luxurious texture. 
D5 siloxane also give shine and softness in shampoo and other hair care products.


-D5 siloxane has good compatibility with most alcohols and other cosmetic solvents and is widely used in cosmetics and human body care products, such as skin care, sunscreen, makeup, hair conditioning products. 
-D5 siloxane can be directly used as a carrier, the main raw materials, can also be used as additives.
-D5 siloxane can also be used in water - based systems by emulsification.


-Daily chemicals: 
skin care lotion, antiperspirant, shampoo; Silicone oil
-D5 siloxane also commonly used in things like sealants, sunscreen, windshield coatings, medical implants, and antiperspirants. 
That’s a lot of things.


-Cosmetic Uses:    
*hair conditioning
*skin conditioning
*skin conditioning - emollient solvents


-D5 siloxane is used Adhesives & Sealants, Chemical Synthesis, Construction Chemicals, Glass & Ceramics, Industrial Chemicals, Silicones & Silanes, Coatings.
-D5 siloxane is used Coatings, Adhesives, Sealants & Elastomers, Chemical & Materials Manufacturing, Construction & Building Materials, Surface Treatment - Fluids, Lubricants & Metalworking.


-D5 siloxane is used EMOLLIENT, HAIR CONDITIONING, SKIN CONDITIONING, SOLVENT.
-A base fluid in a number of personal care products, with excellent spreading, easy rubout and lubrication properties together with unique volatility characteristics.


-D5 siloxane is used Antiperspirants, deodorants, hair sprays, cleansing creams, skin creams, lotions and
stick products, bath oils, suntan and shaving products, make-up, nail polishes.
-In sticks, D5 siloxane has the right balance between volatility and spreading.
-D5 siloxane is classified as a cyclomethicone. 
D5 siloxane is commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. 


-D5 siloxane is becoming more common in hair conditioners, as D5 siloxane makes the hair easier to brush without breakage. 
-D5 siloxane is also used as part of silicone-based personal lubricants. 
D5 siloxane is considered an emollient. 
-In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products. 


-D5 siloxane is used in cosmetic and personal products as a skin emollient.
-D5 siloxane is employed in cosmetics like deodorants, sunblocks, hair sprays and personal care products. 
-Furthermore, D5 siloxane is used in silicone based personal lubricants. 
-In addition, D5 siloxane is a cyclic volatile methylsiloxane used in hair conditioners, thereby brushing the hair without breakage.


-D5 siloxane is a cyclic volatile methylsiloxane (cVMS) used in cosmetic and personal care products. 
-D5 siloxane was also used in a dermal exposure and inhalation toxicity study.
-D5 siloxane is used in personal care products including skin creams, cosmetics, shampoos, deodorants and conditioners. 
-D5 siloxane is also used in various applications such as industrial cleaning fluids and dry cleaning solvents.


-D5 siloxane is used Intermediate in the manufacture of high mol wt siloxane polymers. 
-D5 siloxane is used Carrier ingredient in personal care products; dry cleaning solvent.
-D5 siloxane is incorporated into a formulation for Decamethylcyclopentasiloxane's emollient and solvent activity.
-Octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane are major industrial products, which are either marketed as such or used for the production of polydimethylsiloxanes.


-D5 siloxane 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.
-D5 siloxane is used for excellent spreading, fast evaporation leaving no residue or build-up, leaves a unique soft feel and lubricity; non-greasy feel, non-occlusive and non-irritating. 


-D5 siloxane is used in conditioners, hair sprays, face wash, body wash, make-up, sun care, antiperspirants, and deodorants.
-A cyclic volatile methylsiloxane (cVMS) used in cosmetic and personal care products. 
-Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. 
-D5 siloxane is becoming more common in hair conditioners, as D5 siloxane makes the hair easier to brush without breakage. 


-D5 siloxane is also used as part of silicone based personal lubricants. 
D5 siloxane is considered an emollient. 
-D5 siloxane can be used as:
*A greener solvent in synthetic chemistry applications.
*A monomeric unit for polymerization by various base catalysts to obtain polysiloxane polymer.


-Hair care: 
Reduce drying time, remove thick sense, comb-wet.
-Skin care: 
No irritation, no blocking, easy to smear, reduce greasy feeling, rapid absorption, pigment deposition, smooth feeling/softening effect.


-Antiperspirant / deodorant: Reduce sticky feeling, has dry feeling in use, no imprinting on clothing surface, increase slippery
-D5 siloxane is a silicone fluid commonly used in cosmetics such as deodorants, sunblocks, hair sprays and skin care products to lubricate, waterproof and provide shine. 
-Like all other silicones, D5 siloxane has a unique fluidity that makes it easily spreadable. 


-When applied to the skin and hair, D5 siloxane gives a silky and soft feeling to the touch and acts as a mild water repellent by forming a protective barrier on the skin. 
-D5 siloxanes are involved as intermediates or byproducts in production of silicone fluids, elastomers, and resins.
-D5 siloxane 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. 


-D5 siloxane is 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.
-D5 siloxane is widely used in applications such as antiperspirants, deodorants, hair sprays, cleansing-, skin creams, lotions, bath oils, sun-tanning and shaving products, make-up and nail polishes.


-D5 siloxane is widely used in applications such as antiperspirants, deodorants, hair sprays, cleansing-, skin creams, lotions, bath oils, sun-tanning and shaving products, make-up and nail polishes, Creams, lotions & gels
-D5 siloxane is used Decorative cosmetics/Make-up > Nail polishes
-D5 siloxane is used Hair care (Shampoos, Conditioners & Styling) > Styling/Hair sprays


-D5 siloxane is used Sun care (Sun protection, After-sun & Self-tanning) > Self tanning products
-D5 siloxane is used Toiletries (Shower & Bath, Oral care...) > Antiperspirants & deodorants
-D5 siloxane is used Toiletries (Shower & Bath, Oral care...) > Shaving
Cyclopentasiloxane might not exactly be an ingredient that’s been on your radar for years, but chances are, you’ve probably heard about it as it’s gained popularity recently.


-D5 siloxane is actually a type of silicone that’s regularly used in skincare and haircare products. 
D5 siloxane is specifically part of a small silicone group: cyclomethicones. 
According to clinical studies and reports, cyclomethicones have been deemed safe for cosmetic ingredient uses as they are not significantly absorbed through the skin.


-This colorless, odorless compound, D5 siloxane, is mainly used as an emollient to help smooth out beauty product creams and gels.
-D5 siloxane can also create a protective barrier on your skin once applied, which may help keep your skin safe from toxins, bacteria, germs, pollution, and other yuckiness.


-D5 siloxane’s also commonly used in things like sealants, sunscreen, windshield coatings, medical implants, and antiperspirants. 
-Since D5 siloxane is easy to spread and leaves a nice feel on the skin, D5 siloxane is generally blended with heavier silicones or oils.
-Products with cyclopentasiloxane are suitable for most skin types.
-D5 siloxane works great with heavier silicones or oils because the compound makes them easier to spread.
-D5 siloxane actually works well with most—if not all—types of ingredients. 


-Here are 6 examples of top products that may contain D5 siloxane:
*Hair detangling products
*Waterproof mascara
*Foundation
*Hair spray
*Shampoo
*Body lotion


BENEFITS of D5 SILOXANE:
-Active Carrier
-Improves Wet Combing
-Lubrication

-Spreadability
-Suitable for Clear Formulations
-Tack Reduction

-When applied, D5 siloxane has a silky and slippery texture that creates a protective barrier on the skin and hair. 
-D5 siloxane in hair products may help prevent breakage, detangle, and reduce frizz.
-Seals hydration:
When used on hair, D5 siloxane coats the hair shaft and guards against water loss. 
D5 siloxane works similarly on the skin by creating a barrier that locks in moisture.

-Evaporates quickly:
D5 siloxane is often used in cosmetics and health and beauty products that require faster drying times (think deodorants, sunscreens, and moisturizers).
-Spreads easily:
Like other types of silicones, D5 siloxane in cosmetics applies and spreads easily, leaving a silky smooth texture and a non-greasy finish.

-Has a lightweight feel:
Some silicones are heavy, but D5 siloxane has a lightweight feel. 
This characteristic is especially helpful in products like hair sprays and shampoos.


ADVANTAGES  of D5 SILOXANE:
-Volatile carrier
-Compatible with a wide range of cosmetic ingredients
-Low surface tension
-Imparts soft silky feel to the skin

-Excellent spreading
-Leaves no oily residue or build up
-Detackification
-Non-greasy


HOW TO USE D5 SILOXANE:
D5 siloxane is compatible with many cosmetic ingredients, even some waxes, fatty acids, fatty acid esters and non volatile silicones. 
D5 siloxane features good solubility in most anhydrous alcohols and in many cosmetic solvents.
-Anti-perspirants, deodorant: 3-10%;
-Hair Care: 1-5%;
-Skin Care: 3-10%;
-Perfume: 0.5-3%.


PRODUCTION AND POLYMERIZATION of D5 SILOXANE:
Commercially D5 siloxane 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:

[(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.
Cyclic siloxanes (cyclosiloxanes) are basic members of the broad family of silicone materials.
All silicone materials share a common chemistry but each substance is different when it comes to its properties and use.
D5 siloxane, contains five repeating units of silicon (Si) and oxygen (O) atoms in a closed (cyclic) loop.


WHAT ARE SILOXANES CHEMICALLY?
Silicon (Si) is the second most abundant element on Earth after oxygen. 
Chemically, siloxanes are volatile organosilicon compounds that consist of a backbone of repeating silicon-oxygen (Si-O) bonds with organic groups attached to the silicon atom. 
Structurally, siloxanes can be either linear or cyclic. 
The structures and common names of the most common siloxanes are listed below. 

-Structure of some common siloxanes:
Hexamethyldisiloxane (L2), Hexamethylcyclotrisiloxane (D3) Octamethylcyclotetrasiloxane (D4) Decamethylcyclopentasiloxane (D5)Dodecamethylcyclohexasiloxane (D6).

Organosilicon compounds have been around since 1863. 
But organosilicon chemistry took off only around the 1940s, after successful introduction of silicon polymers. 
Silicon and its polymers are generally considered harmless. 

A variety of silicone polymers (synthetic polymers made up of mainly silicon and oxygen with various organic groups such as methyl, ethyl, benzene etc. attached to it) are used for a variety of purposes, and it is hard to tell if any particular one is more harmful than the others.
It wasn’t until 2014 that the US Environmental Protection Agency (EPA) entered an “Enforceable Consent Agreement” (ECA) to collect environmental-monitoring data on octamethylcyclotetrasiloxane (D4). 

The EPA mentions that “the purpose of the testing program is to conduct environmental monitoring to characterize specified sources and pathways of release of D4 to the environment and resulting exposure of aquatic and sediment-dwelling organisms to D4”.
Additionally, many studies that came before the EPA warned that some cyclosiloxanes (D4 and D5) have an effect on neurotransmitters, apart from suspected estrogenic and tumourigenic effects. 

One of the major concerns, however, is the persistence of siloxanes in different environmental matrices (different environmental compartments such as water, air, atmosphere) and their bio-accumulative properties.
Biomass is the source of biogas. 

Biomass from plants and agricultural crops like corns, agricultural residues like bagasse and bio-waste from humans and animals are used for biogas production.
In many municipalities, biogas is produced in wastewater-treatment plants. 

As our day-to-day activities are incomplete without the use of toiletries, replete with siloxane-containing products, wastewater is the ideal source of siloxanes.
Most siloxanes are volatile compounds. 
Once released into the atmosphere, they are decomposed into intermediate compounds and eventually to carbon dioxide. 

However, some siloxanes remain in wastewater.
In wastewater plants, biogas is developed through activated sludge process.
It involves microbial degradation of biomass without oxygen. 
Siloxanes are not decomposed in the activated sludge process and partly concentrate in the sludge. 

During anaerobic digestion, where the temperature of the sludge reaches approximately 60°C, siloxanes volatilise into the formed biogas.
Siloxanes are used as antifoaming agents during drilling by oil producers. 
So, there is always a possibility of fuel contamination with siloxanes.

When siloxane-contaminated fuels are combusted, after their hydrocarbon component is burnt off, siloxanes react with oxygen to form oxides of silicone (mostly SiO2 and SiO3) that are effectively particles of sand. 
A reaction involving D5 siloxane is given below.
C10Si5H30O5 (D5) + 15O2  =  5SiO2 + 10CO2+ 15H2O
         
A quick look at the site of one of the world’s largest laboratory testing service provider, ALS Global, reveals that there is no official test for siloxane measurement. 

Considering the importance of this measurement, researchers around the globe have been trying to come up with methods for siloxane analysis. 
Various chromatographic, spectroscopic and hyphenated techniques are currently available in literature. 
Since the use of siloxanes is not going to be curtailed in our everyday lives and in industry in the near future, it’s time that various monitoring agencies around the globe come up with standard methods and permissible limits of siloxanes in different matrices.


WHERE DO SILOXANES COME FROM?
The name may sound Greek to many of us, but we are constantly exposed to siloxanes in our everyday lives. 
They are widely used in industries like cosmetics, medical, manufacturing, petroleum and so on.
So, if you brushed your teeth with toothpastes like Colgate or Close-up today, applied moisturiser to your skin, sprayed deodorant to combat odour-causing bacteria or washed your hair with a conditioner for silkiness, you used siloxanes. 

In fact, to your surprise, siloxanes may be present in the burger and fries you just bought from the fast food joint. 
The antifoaming as well as low-calorie fat substitute properties of siloxanes make them useful in the food and food-processing industries too.
Silicones are synthetic ingredients that come in the form of oils and gels with a more or less thick texture.
To identify them in our products, take a look at the ingredients list on packaging. 

They can be found under names such as DIMETHICONE, CYCLOPENTASILOXANE, DIMETHICONOL, PHENYL TRIMETHICONE, AMODIMETHICONE, CYCLOMETHICONE. 
The easiest way to identify silicones is to look for words that end in one of these: –cone, –conol, –silane or –siloxane.
Silicones used in cosmetics are of synthetic origin.
Silicones are ingredients synthesized from silicon, a mineral compound found abundantly in nature as silica, the main constituent of sand.


PHYSICAL and CHEMICAL PROPERTIES of D5 SILOXANE:
Molar mass: 370.770 g·mol−1
Appearance: Colourless liquid
Density: 0.958 g/cm3
Melting point: −47 °C; −53 °F; 226 K
Boiling point: 210 °C (410 °F; 483 K)
Solubility in water: 17.03±0.72 ppb (23 °C)
log P: 8.07
Vapor pressure: 20.4±1.1 Pa (25 °C)
Viscosity: 3.74 cP


Molecular Weight: 370.77
Hydrogen Bond Donor Count: 0
Hydrogen Bond Acceptor Count: 5
Rotatable Bond Count: 0
Exact Mass: 370.09395673
Monoisotopic Mass: 370.09395673
Topological Polar Surface Area: 46.2 Ų
Heavy Atom Count: 20


Formal Charge: 0
Complexity: 258
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes


Appearance: Transparent and colorless,odorless liquid
Viscosity, cst,25ºC: 2~6
Specific gravity ,25ºC: 0.940~0.960
Refractive index ,25ºC: 1.3850~1.4050
Appearance: colorless to pale yellow clear oily liquid (est)
Assay: 95.00 to 100.00
Food Chemicals Codex Listed: No


Specific Gravity: 0.95930 @ 20.00 °C.
Refractive Index: 1.39820 @ 20.00 °C.
Melting Point: -38.00 °C. @ 760.00 mm Hg
Boiling Point: 210.00 °C. @ 760.00 mm Hg
Boiling Point: 209.00 to 210.00 °C. @ 760.00 mm Hg (est)
Vapor Pressure: 0.200000 mmHg @ 25.00 °C.
Flash Point: 204.00 °F. TCC ( 95.60 °C. ) (est)
logP (o/w): 5.200


Physical State: Synthetically derived oily, clear to grayish silicone fluid
Molecular Weight: 370.85
Conversion Factors: 1 ppm = 15.1 mg/m³
1 mg/m³ = 0.0645 ppm
Boiling Point: 210 °C (410 °F)
Melting Point: -38 °C (-36.40 °F)
Vapor pressure: 0.2 mm Hg at 25 ºC (77 ºF)
Saturated Vapor Concentration: 263 ppm (3.2 mg/L) at 25 ºC
Odor Description and Threshold: Odorless
Vapor Density: 6.8


Flash Point: 82.7 °C (180.86 ºF) at 101.3 kPa
Flammability Limits: non-flammable
Autoignition Temperature: 372 °C (701.60 ºF) at 101.3 kPa
Specific Gravity: 0.959 g/cm3 at 20 °C (68 °F)
Solubility: 17µg/l at 23 °C (73 °F) in water; 
soluble in ethanol, ether, acetone, and benzene; very soluble in pyridine.
Partition Coefficient: (log Kow) 8.02 at 25.3 °C
Stability: Stable
Reactivities and Incompatibilities: Oxidizing agents


Appearance: Colorless to transparent liquid
Specific gravity at 25°C (77°F) : 0.95
Chroma, Hazen: <10
Viscosity 25 ℃, mm2 / s: 3.8-4.2
Refractive index at 25°C (77°F): 1.397
Flash point (closed cup), ℃: 80
Cyclotetrasiloxane (D4) content, %: < 0.1
Cyclopentasiloxane(D5) content, %: ≥ 99.0
Soluble: ethyl, butyl acetate, ethanol, isopropanol.


FIRST AID MEASURES of D5 SILOXANE:
-Description of first-aid measures
*General advice:
Consult a physician. 

*If inhaled:
If breathed in, move person into fresh air. 
Consult a physician.

*In case of skin contact:
Wash off with soap and plenty of water. 
Consult a physician.

*In case of eye contact:
Flush eyes with water as a precaution.

*If swallowed:
Rinse mouth with water. 
Consult a physician.


ACCIDENTAL RELEASE MEASURES of D5 SILOXANE:
-Environmental precautions:
Prevent further leakage or spillage if safe to do so. 
Do not let product enter drains.

-Methods and materials for containment and cleaning up:
Keep in suitable, closed containers for disposal.


FIRE FIGHTING MEASURES of D5 SILOXANE:
-Extinguishing media:
*Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.

-Further information:
Use water spray to cool unopened containers.


EXPOSURE CONTROLS/PERSONAL PROTECTION of D5 SILOXANE:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:

*Eye/face protection:
Use safety glasses with side-shields.

*Skin protection:
Handle with gloves. 
Wash and dry hands.

-Control of environmental exposure:
Prevent further leakage or spillage if safe to do so. 
Do not let product enter drains


HANDLING and STORAGE of D5 SILOXANE:
-Precautions for safe handling:
*Hygiene measures:
Handle in accordance with good industrial hygiene and safety practice. 
Wash hands before breaks and at the end of workday.

-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Keep container tightly closed in a dry and well-ventilated place. 
Store in cool place.


STABILITY and REACTIVITY of D5 SILOXANE:
-Reactivity:
No data available

-Chemical stability:
Stable under recommended storage conditions.


SYNONYMS:
Cyclopentasiloxane
Decamethylcyclopentasiloxane
D5 Silicone
D5 Siloxane 
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
UNII-0THT5PCI0R
0THT5PCI0R
Ddecamethylcyclopentasiloxane
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
D5-sil
CCRIS 1328
HSDB 5683
EINECS 208-764-9
decamethyl cyclopentasiloxane
SF 1202
BRN 1800166
Ciclopentasiloxane
Cyclomethicone D5
D5 Cyclomethicone
dimethylcyclopentasiloxane
Decamethylcylopentasiloxane
DSSTox_CID_7184
EC 208-764-9
DSSTox_RID_78338
DSSTox_GSID_27184
SCHEMBL28497
N-Propylheptamethyltrisiloxane
CHEMBL1885178
DTXSID1027184
CHEBI:191092
Decamethylcyclopentasiloxane, 97%
BCP15826
Tox21_303170
CD3770
AKOS008901199
ZINC169743678
CS-W009767
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
AS-59731
D1890
D3770
Decamethylcyclopentasiloxane (cyclic monomer)
FT-0665531
D78203
S05475
Decamethylcyclopentasiloxane, analytical standard
Q414350
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Cyclomethicone 5
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane 
D5 Cyclomethicone

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