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Polydimethylsiloxane CAS 31692-79-2

Molecular Formula:  

Formula Weight: 0

ZSpharmac: Polydimethylsiloxane Raw Material Supplier

Product Name: Polydimethylsiloxane
CAS No: 31692-79-2
Purity: 99%

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Basic Info

Product Name:Polydimethylsiloxane
Other Names:Poly(dimethylsiloxane)hydroxy terminated
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Colorless Liquid
EINECS No.:000-000-0
Provide:Polydimethylsiloxane MSDS;
Polydimethylsiloxane COA

What is Polydimethylsiloxane?

Polydimethylsiloxane (polydimethylsiloxane, referred to as PDMS or PDMSO) is a silicone polymer whose molecular backbone is composed of alternating silicon atoms and oxygen atoms, and each silicon atom is connected to two methyl groups Group (-CH3). PDMS is a colorless, odorless, transparent elastomer with good thermal stability, cold resistance, electrical insulation, chemical inertness and low surface energy (i.e. hydrophobicity).

Polydimethylsiloxane is a highly versatile material with strong adaptability. Different shapes and hardnesses can be customized according to different needs, and it serves many industries such as scientific research, medical care, electronics, chemicals, and food.

Polydimethylsiloxane Property

Boiling point 182 °C
density 0.98 g/mL at 25 °C
refractive index n20/D 1.406
Fp 155 °F

Polydimethylsiloxane Uses

Cosmetics and personal care industry:
PDMS is often used as an ingredient in cosmetics and skin care products such as creams, lotions, sunscreens, shampoos, conditioners, etc. due to its excellent skin and hair affinity, easy spread, smooth and non-greasy feel, and Popular for its ability to help retain skin moisture.
It also acts as a film former and emollient, helping to improve the spreadability and moisturizing feel of products.

Medical field:
In biomedical applications, PDMS is used to manufacture microfluidic chips. Due to its good biocompatibility, high transparency, and good gas permeability, it is suitable for cell culture, drug screening, and diagnostic testing.
In medical device manufacturing, PDMS can be used as a material for implants, prostheses, catheters, etc. because it is non-toxic, inert, soft and highly malleable.

Food industry:
As a food additive, PDMS can be used as a defoaming agent, release agent and anti-sticking agent to reduce foam generation during food processing and improve production efficiency.

Industrial applications:
In industries such as chemical, textile, and papermaking, PDMS serves as an efficient defoamer and lubricant, helping to eliminate harmful foam generated during the production process, reduce friction, and improve the operating efficiency of mechanical components.
In the construction field, PDMS is used as a waterproofing agent, sealant or coating additive to enhance the waterproofing performance and durability of building materials.

Electronic product:
In electronic packaging and semiconductor manufacturing, PDMS can be used in heat dissipation materials, potting materials and insulating materials because of its good electrical insulation properties and thermal stability.

Other areas:
PDMS can also be used as a brightener and protective agent in automobiles, furniture, and leather care products to improve surface gloss and provide antifouling and moisture-proof effects.

Polydimethylsiloxane Features

Chemical structure: PDMS is a chain-like silicone polymer. Its basic unit is [(CH3)2SiO] chain links, which are connected through silicon-oxygen bonds (-Si-O-Si-). This structure gives it Exceptional performance.

Hydrophobicity: Due to the methyl substituent (-CH3) on the silicone backbone, PDMS exhibits strong hydrophobicity, that is, it is insoluble in water, but easily soluble in many organic solvents.

Stability: PDMS has excellent thermal stability and chemical stability, can maintain stable performance in a wide temperature range (-60°C to about 200°C), and has good resistance to acids, alkalis and many other chemicals. tolerance.

Low surface tension: PDMS has a very low surface tension, which allows it to spread easily and form a continuous thin layer, so it is often used as a release agent and anti-stick agent.

Elasticity and flexibility: PDMS can assume different physical states according to different molecular weights, from flowing liquid to elastic solid. Its high molecular weight form can be made into silicone rubber with excellent elasticity and can be used in applications where flexible materials are required.

Biocompatibility: PDMS is particularly outstanding in the field of biomedicine because it has no obvious toxic effects on biological tissues and can exist in the body for a long time without triggering rejection reactions.

Optical transparency: PDMS is transparent, which is critical in optical and microscopy applications, such as when making biological microfluidic chips.

Electrical insulation: When used as an insulating material, PDMS has good dielectric properties and high breakdown strength.

Breathability: Although hydrophobic, the PDMS film still allows oxygen and other small molecule gases to pass through, which is very beneficial for certain applications that require breathable functionality (such as biological culture media).

Versatility: Based on the above characteristics, PDMS is widely used in cosmetics, personal care products, medicine, food processing, electronics industry, materials science, construction and other fields.


Schamschurin, A., Uhrig, D., Fisher, M. et al. The synthesis and characterisation of novel dimethyl- and diphenyl-silanediolates. Silicon Chem 3, 313–325 (2008). 

As a company specializing in the production and supply of Polydimethylsiloxane raw materials, we are committed to providing customers with high-quality products and preferential prices. We have rich experience and technology to ensure product quality and stable supply. No matter where you are, we can provide you with the polydimethylsiloxane raw materials you need to support your production and research and development.

We always adhere to the principle of honest operation, strictly control product quality, and serve every customer with a customer-first attitude. Over the years, we have established good cooperative relationships with customers at home and abroad and won their trust and praise.

If you have needs or are interested in our products, please contact our service staff directly, we will wholeheartedly provide you with the best quality services and products. Looking forward to cooperating with you and developing together!

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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