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Polypropylene Glycol CAS 25322-69-4

Molecular Formula: CH4

Formula Weight: 16.04246

ZSpharmac: Polypropylene Glycol Raw Material Supplier

Product Name: Polypropylene Glycol
CAS No: 25322-69-4
Purity: 99%

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Basic Info

Product Name:Polypropylene Glycol
Other Names:Poly(propylene glycol)
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:White to Light Gray Viscous Liquid
EINECS No.:500-039-8
Provide:Polypropylene Glycol MSDS;
Polypropylene Glycol COA

What is Polypropylene Glycol?

Polypropylene Glycol (polypropylene glycol, referred to as PPG) is a colorless, odorless, non-toxic organic compound. The chemical formula is usually expressed as HO-(CH2CH(CH3)O)n-H, where n represents the degree of polymerization, that is, the number of repeating units. Polypropylene glycol is a linear polymer produced by ring-opening polymerization of propylene glycol (Propylene Glycol).
According to different molecular weights, polypropylene glycol can be divided into different types, such as PPG200, PPG300, PPG400, etc., which correspond to different application requirements.

Polypropylene Glycol Property

Melting point -40 °C
Boiling point >300 °C
density 1.01 g/mL at 20 °C
vapor density >1 (vs air)
vapor pressure <0.01 mm Hg ( 20 °C)
refractive index n20/D 1.451
Fp 230 °C
solubility H2O: <0.01 % (w/w) at 25 °C
form Viscous Liquid
Specific Gravity1.005
color White to light gray

Polypropylene Glycol Uses

Personal care and cosmetics industry:
As a humectant, polypropylene glycol can effectively lock in moisture and help maintain the moisture balance of the skin and hair. It is commonly found in skin care lotions, conditioners, shower gels, shaving creams and makeup products.
Used as an emulsifier and thickener to help mix water and oily ingredients to give products the desired texture and stability.

Pharmaceutical and biotechnology fields:
In pharmaceutical preparations, polypropylene glycol can be used as an excipient to make ointments, gels, oral solutions and injections to enhance drug solubility and improve drug release behavior.
As a biomaterial, polypropylene glycol can be used to prepare drug delivery systems, such as drug controlled release carriers, and biological tissue engineering scaffolds.

Food and Beverage Industry:
Used as an emulsifier, stabilizer and humectant in certain foods and beverages, helping to improve the taste, texture and shelf life of products.

Industrial applications:
In chemical production, polypropylene glycol is used as a solvent and dispersant in the formulation of coatings, adhesives, cleaners, lubricants and inks.
In the plastics and rubber industry, polypropylene glycol is used as a plasticizer to improve the flexibility, stretchability and low-temperature resistance of plastic and rubber products.
In the refrigeration and air-conditioning industry, polypropylene glycol can be used as a component of environmentally friendly refrigeration oil or secondary refrigerant and has good thermal stability and low-temperature fluidity.

Other areas:
In the textile, leather and paper industries, polypropylene glycol is used as a wetting agent, softener and finishing agent to improve the feel and durability of products.
In the electronics industry, certain types of polypropylene glycol are used as cleaning agents and insulating fluids for electronic components.

Characteristics of Polypropylene Glycol

Chemical structure and properties:
Polypropylene glycol is a linear polymer produced by ring-opening polymerization of propylene glycol. The chemical formula is usually expressed as HO-(CH2CH(CH3)O)n-H, where n represents the degree of polymerization, that is, the number of repeating units. Depending on the degree of polymerization, polypropylene glycol has different viscosities and melting points. Common ones include low molecular weight (such as PPG200, PPG300, PPG400, etc.) and high molecular weight (such as PPG600, PPG1000, PPG2000, etc.).

Solubility and Compatibility:
Polypropylene glycol has good solubility properties and can be dissolved in a variety of organic solvents such as water, alcohols, ketones, and esters. It is also compatible with many organic and inorganic compounds, so it is often used as a solvent and dispersant.

Moisturizing and lubricating properties:
In cosmetics and personal care products, low molecular weight polypropylene glycol serves as a humectant and emollient due to its excellent moisturizing properties, helping to maintain the moisture balance of the skin and hair and improving the moisturizing and skin feel of the product.

Emulsifying and thickening effects:
Polypropylene glycol acts as an emulsifier, helping water and oily ingredients mix to form a stable emulsion. In areas such as food, cosmetics and industrial cleaning agents, it helps improve product stability and adjust viscosity.

Chemical stability and safety:
Polypropylene glycol has good chemical stability and low toxicity, is stable to acids and alkalis, and is not easily oxidized.

Multi-field applications:
In the pharmaceutical industry, polypropylene glycol is used as a drug carrier, excipient or solvent to make ointments, gels, pills and injections.
In the chemical industry, it is used as an additive in the production of coatings, adhesives, cleaners, lubricants, inks, plastics and rubber products.
In the food industry, it is used as food additives such as emulsifiers, stabilizers and humectants to improve food quality and taste.


National Center for Biotechnology Information. PubChem Compound Summary for CID 32881, 2-(2-Hydroxypropoxy)propan-1-ol. https://pubchem.ncbi.nlm.nih.gov/compound/2-_2-Hydroxypropoxy_propan-1-ol. Accessed Mar. 30, 2024.

As a company specializing in the production and supply of Polypropylene Glycol 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 Polypropylene Glycol 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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