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Decamethylcyclopentasiloxane CAS 541-02-6

Molecular Formula: C10H30O5Si5

Formula Weight: 370.77

ZSpharmac: Decamethylcyclopentasiloxane Supplier

Product Name: Decamethylcyclopentasiloxane
CAS No: 541-02-6
Purity: 99%

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Basic Info

Product Name:Decamethylcyclopentasiloxane
Other Names:10-Pentaoxapentasilecane
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Colorless Liquid
EINECS No.:208-764-9
Provide:Decamethylcyclopentasiloxane MSDS;
Decamethylcyclopentasiloxane COA

What is Decamethylcyclopentasiloxane?

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, which is safe and environmentally friendly, and has been widely used in health and beauty products , such as deodorants, antiperspirants, cosmetics, shampoos, body lotions, etc., have good compatibility with alcohol and most other cosmetic solvents. Cyclopentasiloxane (D5), octamethylcyclotetrasiloxane (D4) and tetramethyltetravinylcyclotetrasiloxane (D4vi) are all important intermediate monomers, which can be Hexamethyldisiloxane, tetramethyldivinyldisiloxane (DVTMDS) or tetramethyldihydrodisiloxane and other end-capping agents are ring-opened and copolymerized together to prepare silicone oil, silicone rubber, silicone resin, etc. 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 physical and chemical data of these raw materials provide a reliable basis for its separation and purification process .

Decamethylcyclopentasiloxane Property

Melting point -44°C
Boiling point 90 °C/10 mmHg (lit.)
density 0.958 g/mL at 25 °C (lit.)
vapor pressure 33.2Pa at 25℃
refractive index n20/D 1.396(lit.)
Fp 162 °F
storage temp. 2-8°C
solubility <0.0001g/l (calculated)
form Liquid
Specific Gravity0.959
color Colorless
explosive limit0.52-7%(V)
Water Solubility Immiscible with water.


Application of Decamethylcyclopentasiloxane

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

1. A photosensitive intelligent BB cream, which is composed of the following components by weight percentage: iron oxides/titanium dioxide sinter 5% to 12%, cyclopentasiloxane 8% to 15%, 1, 3-propylene glycol 5% to 10%, glycerin 5% to 10%, cyclopentasiloxane (and) dimethicone/vinyl dimethicone crosspolymer ( and) Dimethicone 2% to 5%, Isotridecanyl Isononanoate 2% to 5%, Cyclopentasiloxane (and) Distearyl Dimethyl Ammonium Hectorate Stone (and) propylene carbonate 3% to 5%, polydimethylsiloxane 2% to 5%, nylon-121% to 3%, phenyl polytrimethicone 1% to 2%, PEG -9 Polydimethylsiloxyethyl Dimethicone 1% ~ 4%, Oat Beta-Glucan 2% ~ 4%, Decamethylcyclopentasiloxane (and) Acrylic (Ester) / Dimethicone Oxane copolymer 0.5%~2%, PEG-10 polydimethylsiloxane 1%~2%, sodium chloride 0.5%~1%, dimethyl silylated silica 0.1%~0.3%, benzene 0.3% of oxyethanol/ethylhexylglycerin, 0.1% of caprylyl glycol/ethylhexylglycerin, and the balance of water.

2. A long-lasting concealer moisturizing air cushion BB cream, its formula weight ratio 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 & Stellarium Chloride Hectorite & Isononyl Isononanoate & Ethanol: 0.5 %-1.5%, Acrylates/Ethylhexyl Acrylate/Dimethicone Methacrylate Copolymer: 0.1%-1%, Decamethylcyclopentasiloxane&Dimethicone Crosspolymer: 0.5%-2%, Decamethylcyclopentasiloxane& Trimethylsiloxysilicate: 2%-5%, Shea Butter: 0.5%-2%;

Phase B: Butyl octanol salicylate: 2%-5%, triglyceride (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%, Oxidation Iron yellow: 0.2%-1%, iron oxide black: 0.05%-0.2%;

Phase C: purified water: balance, butanediol: 5%-10%, glycerin: 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 polydimethylsiloxane: 2%-5%;

Phase E: essence: 0.1%-0.4%;

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

Thermomelt Dyeing Method Using Decamethylcyclopentasiloxane as Medium

A kind of heat-melt dyeing method taking D5 as medium, method is as follows: (1) pretreatment of polyester fabric: polyester fabric is carried out pretreatment, and process is: fabric weighs 50g, handles 1.5 hours in 30 ℃ of water temperatures , and then dried at 25 °C for 30 minutes.

(2) Dyeing formula: Disperse dye (c.I disperse ruby): 1.0% (o•w.f); Fabric weight: 50g; Bath ratio: 1:20; Dyeing time: 30min.

(3) Dyeing process: Dye in an overflow dyeing machine, enter the dyeing at room temperature, heat up to 90°C at 3°C/min, then heat up to 190°C at 2°C/min and keep the temperature for 30 minutes Hot-melt color fixation, cooling down to 60°C at 2°C/min, reduction cleaning, final washing and drying.

(4) Reduction cleaning: The dyed fabric is subjected to reduction cleaning according to the GB2394-80 method. The formula of cleaning liquid is bath ratio 1:60; Sodium hydrosulfide: 1.5g/L; Sodium hydroxide: 30%, 3.0ml/L; Clean lotion 209:2g/L; Temperature 80 ℃; Time 10 minutes .

Are Products Containing Cyclic Decamethylcyclopentasiloxane Safe?

Based on the above evaluation comments:

1. Both CIR and SCCS believe that Decamethylcyclopentasiloxane is safe for human body under the existing concentration of cosmetics. Among them, SCCS believes that the above safety conclusions do not include products such as hair styling aerosol, sunscreen spray and oral care.

2. Based on the possible adverse effects of Decamethylcyclopentasiloxane on the environment, some people suggest that SCCS restrict the application of D5 in personal care. The current restrictive measure is that the content of cyclotetramethicone (D4) and cyclopentasiloxane (D5) in rinse-off cosmetics must be less than 0.1%.

Finally, back to the original question, do we still use Decamethylcyclopentasiloxane? Will it be further restricted in the future?

Domestic products, based on product experience and cost control. If Decamethylcyclopentasiloxane is to be used in non-special-purpose cosmetics, use it as it should. Due to the long approval time of special-purpose cosmetics, avoid the “embarrassment” caused by further restrictions on the use of D5 regulations that are still under test and approval. Please use them with discretion. If it can be replaced, it should be replaced as much as possible, and if it cannot be replaced, it can be used. After all, it will take some time for a new regulation to be implemented.

About Products:
If you need Decamethylcyclopentasiloxane this cosmetic raw material, please contact our service personnel directly, we will provide you with high-quality products at the best price.
As an experienced manufacturer and supplier of Decamethylcyclopentasiloxane, ZSpharmac will provide Decamethylcyclopentasiloxane 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, 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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