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Zhishang Chemical

Cyclopentasiloxane CAS 111-42-2

Molecular Formula: C10H30O5Si5

Formula Weight: 370.77

ZSpharmac: Cyclopentasiloxane Supplier

Product Name: Cyclopentasiloxane
CAS No: 111-42-2
Purity: 99%

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Basic Info

Product Name:Cyclopentasiloxane
Other Names:Decamethylcyclopentasiloxane
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Colorless Liquid
EINECS No.:208-764-9
Provide:Cyclopentasiloxane MSDS;
Cyclopentasiloxane COA

What is Cyclopentasiloxane?

Cyclopentasiloxane CAS No. 541-02-6, chemical formula C10H30O5Si5, molecular weight 370.77000, Chinese alias decamethylcyclopentasiloxane, decamethylcyclopentasiloxane, liquid, boiling point 90 °C10 mm Hg(lit.), flash point 162 °F, density 0.958 g/mL at 25 °C (lit.), refractive index n20/D 1.396 (lit.). Decamethylcyclopentasiloxane (cyclopentasiloxane) is a colorless, odorless, volatile liquid cyclic siloxane, safe and environmentally friendly, and has been widely used in health and beauty products , such as deodorants, antiperspirants, cosmetics, shampoos, body lotions, etc. Good compatibility with alcohol and most other cosmetic solvents. Cyclopentasiloxane (D5), octamethylcyclotetrasiloxane (D4) and tetramethyltetravinylcyclotetrasiloxane (D4vi) are all important intermediate monomers, which can be combined with hexamethyldisiloxane, Silicone oil, silicone rubber, silicone resin, etc. are prepared by ring-opening copolymerization with end-capping agents such as tetramethyldivinyldisiloxane (DVTMDS) or tetramethyldihydrodisiloxane. The purity of the monomer directly affects the quality of silicone oil, silicone rubber, etc., so controlling the purity of the monomer is one of the important technical links in the preparation of high-quality silicone materials, and the physicochemical data of these raw materials provides a reliable basis for its separation and purification process. 

Cyclopentasiloxane Property

Melting point -44°C
Boiling point 90 °C/10 mmHg (lit.)
density 0.958 g/mL at 25 °C (lit.)
refractive index n20/D 1.396(lit.)
Fp 162 °F
storage temp. 2-8°C
solubility <0.0001g/l (calculated)
form Liquid
color Colorless
Specific Gravity0.959
explosive limit0.52-7%(V)
Water Solubility Immiscible with water.


Application of Cyclopentasiloxane

Cyclopentasiloxane is widely used in cosmetic and body care products and has good compatibility with most alcohols and other cosmetic solvents. Application examples are as follows:

1. A light-sensing smart BB cream, which is composed of the following components by weight: 5% to 12% of iron oxide/titanium dioxide sinter, 8% to 15% of Cyclopentasiloxane, 5% to 10% of 1,3-propanediol, Glycerin 5% to 10%, Cyclopentasiloxane (and) Dimethicone/Vinyl Dimethicone Crosspolymer (and) Dimethicone 2%~5%, Isotridecyl isononanoate 2%~5%, Cyclopentasiloxane (and) distearyl dimethylammonium hectorite (and) propylene carbonate 3%~5%, polydimethyl Siloxane 2%~5%, Nylon-121%~3%, Phenyl Trimethicone 1%~2%, PEG-9 Dimethicone Ethyl Dimethicone 1% to 4%, oat beta-glucan 2% to 4%, cyclopentasiloxane (and) acrylic acid (ester)/polydimethylsiloxane copolymer 0.5% to 2% , PEG-10 polydimethylsiloxane 1% to 2%, sodium chloride 0.5% to 1%, dimethylsilylated silica 0.1% to 0.3%, phenoxyethanol/ethylhexylglycerol 0.3% , Caprylyl glycol/ethylhexylglycerol 0.1%, water balance.

2. A long-lasting concealer moisturizing air cushion BB cream, the formula weight of which is as follows:

Phase A: Emulsifier: 3%-5%, Dimethicone: 2%-5%, Ethylhexyl Methoxycinnamate: 2%-5%, Cyclopentasiloxane Alkane: 8%-15%, Cetyl Dimethicone: 0.5%-2%, Ethylhexyl Palmitate & Seranium Chloride Hectorite & Isononyl Iononanoate & Ethanol: 0.5 %-1.5%, acrylic (ester) type/ethylhexyl acrylate/polydimethylsiloxane methacrylate copolymer: 0.1%-1%, Cyclopentasiloxane & polydimethylsiloxane crosspolymer: 0.5%-2%, Cyclopentasiloxane & Trimethylsiloxysilicate: 2%-5%, Shea Butter: 0.5%-2%;

Phase B: Butyl Octanol Salicylate: 2%-5%, Tris(ethylhexanoate): 2%-6%, Magnesium Myristate: 0.2-1%, HDI/Trimethylol Caprolactone Crosspolymer & Silica: 0.5%-2%, PMMA: 1%-3%, Titanium Dioxide: 8%-12%, Iron Oxide Red: 0.1%-0.4%, Oxidized Iron yellow: 0.2%-1%, iron oxide black: 0.05%-0.2%;

Phase C: Purified Water: Balance, Butylene Glycol: 5%-10%, Glycerol: 8%-15%, Sodium Chloride: 1%-3%, Trehalose: 0.2%-1%, Phenoxyethanol & Ethylhexylglycerin: 0.5%-0.8%, Sodium Hyaluronate: 0.01%-0.05%;

Phase D: C15-19 Alkane & Diphenyl Dimethicone: 2%-5%;

Phase E: Flavor: 0.1%-0.4%;

The sum of the weight percentages of the above raw materials is 100%.

What are the Benefits of Cyclopentasiloxane?

Cyclopentasiloxane assists generate a smooth, silky formula that enables the item to spread uniformly on the skin. It stops product from adhering to dry skin spots and also even complexion by sliding with pores and wrinkles. It guarantees that all locations of the skin obtain the vital components in the product.

Cyclopentasiloxane is a volatile substance – like all cyclomethicone. This permits it to gradually evaporate from the skin, leaving the key ingredients of the product without the heaviness of other silicone ingredients.

Among one of the most substantial advantages of cyclopentasiloxane is that it is a cost-effective active ingredient for formulators. Cyclopentasiloxane, for instance, can be utilized as a low-cost choice to natural components like vegetable glycerin, and its focus in skin care products can be transformed much more easily since it is synthetically produced.

Synthetic active ingredients often obtain a bum rap in the skincare globe because they’re not considered all-natural. This is a little a misunderstanding; synthetic components are generally safer than those of plant or pet origin because they include fewer impurities. They are also better for the atmosphere because they do not require to find from natural resources.

A research study released in Skin Pharmacology and Physiology explored the effects of cyclopentasiloxane on the skin. The research study took into consideration the occlusive residential or commercial properties of cyclomethicone as a whole. Occlusive materials keep moisture in and irritants as well as germs in by producing a physical barrier in between the skin as well as the air.

The study discovered that cyclomethicone is non-blocking due to the volatility of the components. The volatility of this ingredient allows cyclomethicone to evaporate from the skin, creating a safety barrier only for a short time. These results are excellent news for clogged skin, as it prevents sweat and also skincare active ingredients from being pushed deep into the pores. However, occlusive obstacles are normally ideal for completely dry skin types because they stop moisture loss. Cyclomethicone might still aid boost the appearance of completely dry skin due to the fact that the speed at which evaporation happens slows down the skin, as well as a few of the time these ingredients are on the skin will still offer a safety obstacle to the skin.

Cyclomethicone has actually been recommended for usage with other silicone active ingredients to boost the appearance of scars. A research study released in the Journal of Dermatology as well as Plastic surgery figured out that a silicone gel formulation dramatically improved the look of shallow, hypertrophic and also keloid scars. While this study has actually not been carried out particularly on cyclomethicone, it pertains to a wider subgroup of silicones. Several silicone gel formulas include cyclopentasiloxane or cyclohexasiloxane, which are used in volatile components to deliver other silicone components to the skin.

About Products:
If you need Cyclopentasiloxane, a cosmetic raw material, please contact our service staff directly, we will provide you with high-quality products at the best price.
As an experienced Cyclopentasiloxane manufacturer and supplier, ZSpharmac will provide Cyclopentasiloxane raw materials to customers all over the world for a long time.
Over the years, the company has been adhering to the spirit of “integrity management, strict quality control, and customer first”, and has won unanimous praise from domestic and foreign customers.

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

Help China Chemicals to benefit the happiness of human life
Become the most trusted chemical supplier in the world
Striver – oriented, enrich employees, customer first, deep service, seek development
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Cosmetic raw materials
  • Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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