Dipropylene glycol
Dipropylene glycol (CAS 25265-71-8), a colourless liquid with the formula HOC3H6OC3H6OH, is a mixture of three isomers. This organic compound functions as a versatile solvent and humectant. It finds use in various industrial applications, including as a plasticiser, a component in inks and dyes, and as an intermediate in the synthesis of other chemicals. Its low volatility and excellent solvency make it suitable for a range of formulation needs.
- IUPAC
- Bis(hydroxypropyl) ether
- Synonyms
- Bis(hydroxypropyl) ether

Solvent Applications
Dipropylene glycol serves as an effective solvent in industrial cleaning formulations, inks, and coatings due to its ability to dissolve a variety of organic substances. Its low volatility contributes to controlled evaporation rates in these applications.
Plasticiser
This glycol is utilised as a plasticiser, enhancing the flexibility and durability of various polymers and resins. It helps to reduce brittleness and improve the processing characteristics of materials.
Chemical Synthesis Intermediate
As an organic building block, dipropylene glycol is employed in the synthesis of other chemical compounds. It is particularly useful in reactions involving its hydroxyl functional groups, leading to esters, ethers, and polyurethanes.
Humectant and Emollient
In certain industrial formulations, dipropylene glycol can act as a humectant, helping to retain moisture. It may also function as an emollient in non-cosmetic applications requiring softening properties.
| Molecular weight | 134.17 |
|---|---|
| Linear formula | HOC3H6OC3H6OH |
| Assay | ≥99.0% (total assay of isomers, GC) |
| Boiling point | 90-95 °C/1 mmHg |
| Density | 1.023 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.441(lit.)n20/D 1.441 |
| Vapour pressure | <0.01 mmHg (20 °C) |
| Vapour density | 4.6 (vs air) |
| Protective equipment | Eyeshields, Gloves |
|---|---|
| Flash point | 130 °C / 266 °F |
| Water hazard class (WGK, DE) | 1 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Dipropylene glycol used for?
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Dipropylene glycol is used as a solvent, plasticiser, humectant, and an intermediate in chemical synthesis. It is found in various industrial products such as inks, coatings, and plastic materials.
What is the CAS number and formula for Dipropylene glycol?
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The CAS number for Dipropylene glycol is 25265-71-8 and its linear formula is HOC3H6OC3H6OH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Dipropylene glycol with an assay of ≥99.0% (total assay of isomers, GC). This product is not supplied as USP, BP, or EP grade.
How should Dipropylene glycol be handled safely?
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When handling Dipropylene glycol, it is advised to use eyeshields and gloves. The substance has a flash point of 130°C (266°F) and a low vapor pressure, indicating moderate flammability risk at elevated temperatures. Always refer to the safety data sheet for comprehensive guidance.
Is Dipropylene glycol a controlled substance?
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Based on the provided data, Dipropylene glycol (CAS 25265-71-8) is not indicated as a controlled or scheduled substance.
How is Dipropylene glycol packed, shipped, and exported?
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Tech Serve Solutions packs, ships, and exports chemicals adhering to all relevant international regulations for safe transport. Specific packaging details are available upon request.
How can I request a sample or quote for Dipropylene glycol?
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To request a sample or a quote for Dipropylene glycol, please contact our sales department through the website or by phone, referencing the product name and CAS number.
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