Propylene glycol is used as antifreeze in breweries and diaries, in the manufacture of resins, as a solvent, and as an emulsifier in food. It was present as an occupational sensitizer in the color-film developer Flexicolor. An alcohol in which the hydroxyl groups are attached to a carbon atom of a branched or straight-chain aliphatic hydrocarbon. Propylene glycol has a slight, characteristic taste. It is practically odorless. It absorbs moisture when exposed to moist air. Manufactured by treating propylene with chlorinated water to form the chlorohydrin, which is converted to the glycol by treatment with sodium carbonate solution. It is also prepared by heating glycerol with sodium hydroxide. Propylene glycol is a synthetic liquid substance that absorbs water. It is used primarily as a type of antifreeze when leakage might lead to contact with food. It is also used as a solvent for food colors and flavors, and in the manufacture of a variety of products, including pharmaceuticals, cosmetic products, and as a carrier in fragrance oils. Despite its widespread use, it is generally recognized as safe for use in foods and cosmetics by regulatory agencies. Its versatility makes it a key ingredient in many industrial applications.
| Propylene glycol Chemical Properties |
| Melting point |
-60 °C (lit.) |
| Boiling point |
187 °C (lit.) |
| density |
1.036 g/mL at 25 °C (lit.) |
| vapor density |
2.62 (vs air) |
| vapor pressure |
0.08 mm Hg ( 20 °C) |
| refractive index |
n20/D 1.432(lit.) |
| FEMA |
2940 | PROPYLENE GLYCOL |
| Fp |
225 °F |
| storage temp. |
Store at +5°C to +30°C. |
| solubility |
Chloroform (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly) |
| pka |
14.49±0.20(Predicted) |
| form |
Viscous Liquid |
| color |
APHA: ≤10 |
| Specific Gravity |
1.038 (20/20ºC)1.036~1.040 |
| Odor |
at 100.00 %. odorless very slight alcoholic |
| PH |
6-8 (100g/l, H2O, 20ºC) |
| explosive limit |
2.4-17.4%(V) |
| Odor Type |
odorless |
| Water Solubility |
miscible |
| Sensitive |
Hygroscopic |
| Merck |
14,7855 |
| JECFA Number |
925 |
| BRN |
1340498 |
| Dielectric constant |
32.0 |
| InChIKey |
DNIAPMSPPWPWGF-UHFFFAOYSA-N |
| LogP |
-0.92 |
| CAS DataBase Reference |
57-55-6(CAS DataBase Reference) |
| NIST Chemistry Reference |
Propylene glycol(57-55-6) |
| EPA Substance Registry System |
Propylene glycol (57-55-6) |
| Safety Statements |
24/25 |
| WGK Germany |
1 |
| RTECS |
TY2000000 |
| Autoignition Temperature |
779 °F |
| TSCA |
Yes |
| HS Code |
29053200 |
| Hazardous Substances Data |
57-55-6(Hazardous Substances Data) |
| Toxicity |
LD50 orally in Rabbit: 19400 - 36000 mg/kg LD50 dermal Rabbit 20800 mg/kg |
Propylene glycol is used for similar applications as other glycols. Propylene glycol is an important raw material for unsaturated polyester, epoxy resin, and polyurethane resin. The use amount in this area accounts for about 45% of the total consumption of propylene glycol. Such unsaturated polyester is used extensively for reinforced plastics and surface coatings. Propylene glycol is excellent in viscosity and hygroscopicity and is non-toxic, and thus is widely used as hygroscopic agent, antifreeze, lubricants and solvents in the food, pharmaceutical and cosmetic industry. In the food industry, propylene glycol reacts with fatty acid to give propylene ester of fatty acids, and is mainly used as food emulsifier; Propylene glycol is a good solvent for flavorings and pigments. Propylene glycol is commonly used as solvents, softeners and excipients, etc. in the pharmaceutical industry for the manufacture of various types of ointments and salves. Propylene glycol is also used as a solvent and a softener for cosmetic since it has good mutual solubility with various spices. Propylene glycol is also used as tobacco moisturizing agents, antifungal agents, food processing equipment lubricants and solvents for food marking ink. Aqueous solution of propylene glycol is an effective anti-freeze agent.
Product Quality Advantages
Vast Production Capacity With an annual production capacity of 5,000 tons, we guarantee a long-term and stable supply to meet your needs.
Innovative Separation Technology Our research and development team, consisting of 28 highly skilled professionals, pioneers in separation technology, ensures our leading edge in product innovation and development.
Unmatched Product Purity for Propylene glycol The product purity of Propylene glycol has reached an industry-leading level of over 99.5%, a significant achievement that not only redefines market standards but also showcases our commitment and pursuit of product quality. This exceptional purity guarantees efficient performance and stability of Fatty alcohol polyoxyethylene ether across various applications, meeting or even exceeding the most stringent specifications.
1. Can I get samples?
Yes, free samples are available.
Samples will usually be sent out within 1-3 working days.
2. Do you accept customized orders?
Yes, both product and package can be customized.
3. What is the payment terms?
TT, LC, DP are available.
Please note that OME orders require payment prior to shipment.
4. What is the lead time for mass production?
Delivery time depends on product type and quantity.
Our company has a digital ordering system to ensure scientific and reasonable scheduling of orders, please consult the sales staff you contacted.
5. How to guarantee the product quality?
We have a complete raw material inspection, quality control and pre-factory inspection system to ensure that the order delivered to you is in line with the contract.
In addition, it also supports third-party inspection before shipment. If the inspection fails, the customer's payment will be refunded, and the loss caused by the breach of contract will be compensated.
6. How to check the order status after payment?
After the order is confirmed, the merchandiser will follow up every week and update the order status to you by email.
7. How to deal with after-sales problems?
The after-sales service implements the order responsibility system, and the salesman is the first responsible person for the order. The after-sales service department will set up a service team after receiving the complaint. They will complete the incident investigation and provide you with a resolution within 72 hours.
Over Two Decades of Expertise Leverage our extensive 22+ years of experience to guide every phase of your order, ensuring a seamless and worry-free process.
Comprehensive Order Supervision From the moment you reach out to us, every step of your order is meticulously supervised to alleviate any concerns you might have.
--Engage with our dedicated sales team for swift responses within 12 hours.
--Gain clarity on quality, price, payment terms, packaging, and delivery timelines to facilitate your decision-making.
--Shipping information is promptly shared on the departure day.
--Stay informed at each stage until the successful receipt of your shipment.
Expert Loading Report Services An external team meticulously inspects loading operations to ensure everything is in perfect order, backed by a detailed Loading Report for each shipment, with prior samples available upon request.
Unbeatable Pricing Our profound industry insight, coupled with strong partnerships with select manufacturers, enables us to offer the most competitive prices.
Quality Assured Products We only approve products that meet the highest international standards and regulations.
Strategic Warehouse Solutions With our warehouse services, we ensure a stable supply for our clients, buffering against the volatility of material prices.
Sincere Chemical Co., Ltd., established in 2021, is located in the Huarun Mansion, Longhua District, Haikou City, Hainan Province, boasting a brand-new, ultra 5A-level office environment. Based on the profound corporate culture of Shijiazhuang Chenghexin Chemical, which has more than 20 years of experience, the company fully supports the development of import and export-related businesses for its Hainan branch. The company has a harmonious atmosphere, generous benefits, and offers substantial room for growth.
Since its inception, the company has always adhered to the development philosophy of "integrity, stability, innovation, and precision". It continuously explores and innovates, enhancing the R&D and production capabilities of new products. The company's products are constantly optimized and perfected, and it maintains long-term stable cooperation with domestically powerful factories as well as national and provincial scientific research institutes. This ensures that the products' technology is advanced, quality is stable, and prices are competitive, now forming a professional chemical raw material supply enterprise that combines science, industry, and trade with both domestic and international trade.
In recent years, the company has won several national and provincial awards and titles for being a trustworthy enterprise and has been recognized as a quality and efficiency-oriented enterprise. It has also received accolades and recommendations from internet companies like Alibaba, Baidu, and HC.com; particularly, it has been featured in a special interview and promotion by the CCTV Securities Information Channel's "Brand Power" program.
After more than 20 years of efforts, the company has continued to grow and expand. Its client base includes highly influential local enterprises, listed companies, and Fortune 500 companies, earning long-term trust and support from both new and old customers. With a bright future ahead, all employees are confident in the company's development.
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