Dipropylene Glycol (DPG)
Elevate Your Industrial Processes with Our Ultra-Pure Dipropylene Glycol
Transform your production with our superior-grade Dipropylene Glycol
Anhui Eapearl Chemical founded in 2009, is a national science and technology enterprise with the research and development, marketing and international trade of dihydric alcohol and organic carbonate products as the core, and a well-known chemical supplier in China with ISO certification and licensed hazardous and toxic chemicals license.
Dipropylene glycol, famed for its low toxicity and odorless nature, stands as the unsung hero in a myriad of sectors. From the meticulous crafting of fragrances to the formulation of resins and coatings, our solvent ensures your products achieve the zenith of quality.
DPG structural formula
| CAS | 25265-71-8 |
| chemical formula | C6H14O3 |
| molecular weight | 134.17 |
| purity | >99.50% |
| grade | industrial grade and fragrance grade |
Dipropylene glycol (also known as oyybispropanol, 2,2-dihydroxyisopropylether, 1,1-oxydipropane-2-ol, di-1,2-propylene glycol, and DPG) is a clear, colourless, viscous liquid with a characteristic odour and the formula C6H14O3. It is fully miscible in water and is also miscible with many organic solvents. This solvency, combined with low toxicity and a low evaporation rate, makes DPG a chemical which is a very useful reactive intermediate in a range of industries.
Dipropylene glycol (DPG) comes in two grades: industrial grade and fragrance grade. And both grades of DPG are available in our company.
Dipropylene Glycol (DPG) Application
Dipropylene glycol (DPG) Industrial grade
Dipropylene glycol (DPG) Industrial grade is a by-product of the production of monopropylene glycol with a purity greater than 99%. DPG is a water soluble, medium viscosity, hygroscopic liquid with low vapor pressure.
Dipropylene glycol industrial grade is only used for technical applications, such as DPG industrial grade as a solvent, coupling agent and chemical intermediate is widely used in many industries such as polyurethane raw materials, paints and coatings, plasticizers, UPR resins, etc
Dipropylene glycol (DPG) fragrance grade
Dipropylene glycol (DPG) fragrance grade is a distilled product with a purity greater than 99.5% as dipropylene glycol, and only the fragrance grade is appropriate for use in perfumes and personal care products.
Dipropylene glycol fragrance grade, is used as a solvent due to the fact that it is odorless, colorless and has a high boiling point and a low toxicity. Not only can it act as a carrier, it is also a diluent, or a compound used to dilute the strength of fragrance oils. This compound can be used both by home fragrance makers and commercial fragrance makers such as Perfumes, Skin care, Deodorants/antiperspirants, Hair care.
Dipropylene glycol can bind and carry both essential oils and fragrance oils (blended essential oils). The compound works in perfumes due its ability to help attaching to the fragrance molecules and making them slower to disperse. The strength of a perfume can be changed by raising or lowering the ratio of dipropylene glycol in the formula.
DPG industrial grade vs DPG fragrance grade
| DPG industrial grade | DPG fragrance grade | |
| purity | >99% | >99.5% |
| Benefits | ★ Good reactivity ★ Viscosity modifier ★ Water miscibility ★ Provides additional flexibility to resins | ★ Low odor ★ Low skin irritation and toxicity ★ Excellent co-solvent for water, oils, and hydrocarbons ★ Traceable through entire supply chain ★ Manufactured in compliance under strict Cosmetics Good Manufacturing Practices |
| Uses | ★ Urethane raw material ★ Paints and Coatings ★ Plasticizers ★ UPR Resins | ★ Perfumes and colognes ★ Skin care – creams, lotions, sun-care products ★ Deodorants/antiperspirants – roll-on, stick deodorants ★ Hair care – shampoos, conditioners, styling, coloring products ★ Shaving products – creams, foams, gels, after-shave lotions ★ Bath and shower products |
Preparation ethod of Dipropylene Glycol (DPG)
The dipropylene glycol product is mainly from the by-product in the process of propylene glycol production by cyclopropyl water method, and the yield is small. Some manufacturers use sodium methanol and other base catalysts to synthesize dipropylene glycol products, propylene glycol, propylene oxide and catalyst mixed at 130-200℃, 0.1-1.0MPa pressure conditions, synthesis of dipropylene glycol crude products, and then refined and purified, to obtain dipropylene glycol products.
In our company, the production process of dipropylene glycol involves the following steps:
step1. Catalytic Condensation: Propylene oxide and propylene glycol are condensed to produce dipropylene glycol. This reaction takes place in the presence of an acidic ionic liquid as a catalyst. The reaction conditions are as follows:
Temperature: 80 to 150°C, preferably 100 to 120°C
Pressure: 0.1 to 1 MPa, preferably 0.2 to 0.5 MPa
Reaction Time: 1 to 5 hours
Catalyst Amount: The acidic ionic liquid catalyst is used at 0.2 to 5% of the total mass of propylene oxide and propylene glycol.
Mass Ratio: The mass ratio of propylene oxide to propylene glycol is in the range of 0.1 to 1:1.
step 2. Catalyst Separation: After the condensation reaction, the reaction product containing dipropylene glycol and the catalyst are separated through negative pressure distillation. The catalyst can be recycled for further use.
Compared to traditional methods, our process utilizes specific acidic ionic liquid catalysts at controlled temperature and pressure conditions. This results in several advantages:
High Catalytic Activity: The ionic liquid catalyst used in this method is highly active, leading to a high conversion rate in the reaction.
Reduced Freezing Point: The dipropylene glycol product obtained has a lower freezing point, addressing challenges related to winter transportation and storage.
Enhanced Purity: After refinement and purification, the product can achieve a purity of over 99.9%, with minimal color and odor. The product does not crystallize at minus 5 degrees Celsius and the isomers are distributed evenly. This quality meets the requirements of high-end applications such as the production of daily chemical flavors and high-grade unsaturated resins.
Low Corrosion and Recyclability: The catalyst used in this process has low corrosion, and it is easy to recycle for multiple production cycles.
Process Simplicity: The reaction does not require high-temperature or high-pressure conditions, making it achievable with straightforward equipment and processes.
| product | purity | colour and luster | crystallinity | remark |
| conventional method DPG | ≥99.5% | yellowish color | crystallized | Uneven distribution in isomers |
| improved method DPG | ≥99.9% | colorless and transparent | uncrystallized | The isomers are distributed evenly |
It can be seen from the table that the dipropylene glycol prepared by this method has high purity, light color, the sample was not crystallized at -5 °, cuniform isomer distribution and good product quality.
This innovative approach offers significant benefits in terms of product quality, efficiency, and ease of production. If you have any further inquiries or require additional details, please don’t hesitate to reach out.
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Dipropylene Glycol (DPG) Information
Our company supplies dipropylene glycol of industrial grade and fragrance grade with purity above 99.5% and has the following packaging: drum, IBC drum, flexibag, ISO tank.
For the above four packing methods, the capacity and net weight of the 20GP container and the 40GP container can be referred to the following table.
| DPG packaging | capacity | 20GP | 40GP |
| drum | 215 kg /drum | total 80 drums, Net 17.2 ton | total 112 drums, Net 24.08 ton |
| IBC drum | 1 ton /IBC drum | total 20 IBC drums, Net 20 ton | total 26 IBC drums, Net 26 ton |
| flexibag | 25 ton /flexibag | 1 flexibag, Net 25 ton | N/A |
| ISO Tank | 25 ton /ISO Tank | 1 ISO Tank, Net 25 ton | N/A |
About dipropylene glycol we welcome you to test and check the quality. We offer the samples free of charge, but the freight will be borne by you.
How can we handle your order?
step 1
We will communicate with you within 24 hours after you send an enquiry.
step 2
If you need sample testing, we will send samples within 5 days，≤50kg, Express delivery recommended, usually called as DDU service; delivery time 5-7 days. Door to door service.
step 3
If you need bulk goods after the sample test is qualified, we will ship the goods to the port and keep the samples within 6 days after the order is confirmed. Sea shipping recommended, usually called as FOB, CFR, or CIF service.delivery time 10-45 days. Port to port service.
step 4
After waiting for you to receive the goods, we will arrange professional staff to pay a return visit within 7 days.
Technical of Dipropylene Glycol (DPG)
| Dipropylene glycol for short | DPG |
| Molecular Formula | C6H14O3 |
| Molar Mass | 134.17 |
| Density | 1.023 g/mL at 25 °C (lit.) |
| Melting Point | -32℃ |
| Boling Point | 90-95°C1mm Hg |
| Flash Point | 280°F |
| Water Solubility | MISCIBLE |
| Solubility | Chloroform (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly) |
| Vapor Presure | <0.01 mm Hg ( 20 °C) |
| Vapor Density | 4.6 (vs air) |
| Appearance | Liquid |
| Color | Colorless,sltly viscous liquid |
| Odor | nearly odorless |
| BRN | 1698372 |
| PH | 6-7 (100g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents. |
| Sensitive | Hygroscopic |
| Explosive Limit | 2.9-12.6%(V) |
| Refractive Index | n20/D 1.441(lit.) |
| MDL Number | MFCD29035085 |
| Physical and Chemical Properties | Dipropylene glycol is colorless and slightly viscous liquid in appearance; Boiling point 233℃; Relative density 1.0252 (20℃); Refractive index 1.439 (25℃); Viscosity 107Chemical BookMPA.s (20℃); Molecular weight 134.17; Flash point 137℃. It is soluble in water and toluene, and can also undergo esterification, etherification, acetalization, halogenation and other reactions. |
| PSA | 49.69 |
| LogP | -0.82 |
| Toxicity | LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rabbit > 5000 mg/kg |
| Flammability | this material is combustible, but will not ignite readily. |
| HS Code | 29094919 |
| Specific Gravity | 1.023 |
| EINECS | 246-770-3 |
| pKa | 14.19±0.20(Predicted) |
Downloadable Dipropylene Glycol (DPG) Documents
COA
COA of DPG fragrance grade
COA of DPG industrial grade
MSDS
MSDS of DPG fragrance grade
MSDS of DPG industrial grade
TDS
TDS of DPG
For dipropylene glycol we are ISO certified and we can provide reach certificate, details can be obtained by submitting an enquiry.
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FAQs of Dipropylene Glycol (DPG)
What are the benefits of dipropylene glycol?
Dipropylene glycol helps in getting uniform distribution. It is also used as a masking agent. At times some actives have offending odor or taste but it is really a beneficial ingredient for skin, in that case, the masking agent helps overcome unacceptable taste, smell or even color.
How Is The Quality?
The purity of the industrial grade and fragrance grade dipropylene glycol products exported by our company has reached more than 99.9%, and the quality is excellent with competitive pricing.
What are the payment options?
You can use Western Union, which has a lower fee, or PayPal if you can accept a slightly higher fee, but please note that for new customers, we only accept the 30% T/T of the payment, or if you have been with us for years and run into cash flow pressure, we do offer OA credit.
How long does it usually take for me to receive the goods?
Depending on the speed of customs clearance and logistics, we can guarantee that the product will be shipped to the port within 5 working days of the order being confirmed, and we have customers in Singapore who receive the goods within 3 weeks.
What is your minimum order quantity for dipropylene glycol?
For dipropylene glycol, our minimum order quantity is 1 ton. Of course, if you order a large quantity, we can give you a discount on the price.
Can I come to China for factory inspection?
Of course, we welcome you to inspect factories in China and we support online factory inspection using ZOOM.
