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Dipropylene glycol (also known as oyybispropanol, 2,2-dihydroxyisopropylether, 1,1-oxydipropane-2-ol, di-1,2-propylene glycol, and Dipropylene Glycol (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 Dipropylene Glycol (DPG) a chemical that is a very useful reactive intermediate in a range of industries. Dipropylene glycol is a mixture of three isomeric chemical compounds, 4-oxa-2,6-heptandiol, 2-(2-hydroxy-propoxy)-propan-1-ol, and 2-(2-hydroxy-1-methyl-ethoxy)-propan-1-ol. It is a colourless, nearly odourless liquid with a high boiling point and low toxicity.
CAS NO: 25265-71-8
EC NUMBER: 219-251-4
IUPAC NAMES:
4-Oxa-2,6-heptandiol and
4-Oxa-1,6-heptandiol
1,1'-oxybis(propan-2-ol)
1,1'-oxydi-2-propanol
1,1'-oxydipropan-1-ol
1,1-Oxydi-2-Propanol
1,1-oxydi-2-propanol
1-(2-hydroxypropoxy)propan-2-ol; 2-(2-hydroxypropoxy)propan-1-ol; 2-[(1-hydroxypropan-2-yl)oxy]propan-1-ol
Agent I858
Di propylene glycol
Dipropylen glycol mixture of isomers
DIPROPYLENE GLYCOL
Dipropylene Glycol
Dipropylene Glycol
Dipropylene glycol
Dipropylene glycol (DPG)
Dipropylene Glycol, DPG
Dipropylene glycol, DPG
Dipropyleneglycol
Dipropyleneglycol
dipropyleneglycol
DPG
Oxidipropanol
Oxybispropanol
Oxydipropanol
oxydipropanol
Oxydipropanol
oxydipropanol
oxydipropanol (DPG)
Oxydipropanol / Dipropylene Glycol
propanol, oxybis-
Reaction products of 2-(2-hydroxypropoxy)propanol，1,1'-oxydipropan-2-ol and 2,2'-oxydipropanol
SYNONYMS:
(1,1'-dimethyldiethylene glycol / 1,1'-oxybis(2-propanol) / 1,1'-oxydi-2-propanol / 1,1'-oxydipropan-2-ol / 2,2'-dihydroxydipropyl ether / 2,2'-dihydroxyisopropyl ether / 2,2-dihydroxyisopropyl ether / 2-propanol, 1,1'-oxybis- / beta,beta'-dihydroxydi-n-propyl ether / bis(2-hydroxypropyl)ether / bis(hydroxypropyl)ether / dipropyleneglycol, mixture of isomers / oxydipropanol;Oxybispropanol; Di-sec-alcohol; Bis(2-hydroxy-propyl)ether; oxybis-propanol; oxybis- propanol, oxybis-; dipropylene glycol; bis(hydroxypropyl) ether; oxydipropanol; di(propylene glycol); di-sec-alcohol; bis(2-hydroxy-propyl)ether; 1,1′-dimethyldiethylene glycol; 1,1′-oxybis- 2-propanol; 1,1′-oxybis-2-propano; 1,1′-oxydipropan-2-ol; 2-propanol, 1,1′-oxybis-; 2propanol, 1,1 oxybis; di-1,2-propylene glycol; 1,1′-oxydi-2-propanol; oxydipropanol;oxybis-propano; oxybispropanol; HOSTALUXPNFLUID; Dipropyleneglycol; Dipropylenglykol; Dowanol DPG; DPG-FC; DPG-RF; EC 246-770-3; EINECS 246-770-3; EPA Pesticide Chemical Code 068604; HSDB 2658; Oxybispropanol; Propanol, oxybis-; UNII-E107L85C40; DSSTox_CID_5186; DSSTox_RID_78591; DSSTox_GSID_27856; CAS-25265-71-8; 1-(1-hydroxypropoxy)propan-1-ol; NCGC00090688-01; SCHEMBL93793; [DID-no:2584]; CHEMBL1375124; Tox21_202321; Tox21_300565; NCGC00090688-02; NCGC00163761-01; NCGC00163761-02; NCGC00163761-03; NCGC00254428-01
Consumer Uses
Dipropylene Glycol is used in the following products: anti-freeze products, lubricants and greases and biocides (e.g. disinfectants, pest control products).
Another release to the environment of Dipropylene Glycol is likely to occur from outdoor use, indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), indoor use in close systems with minimal release (e.g. cooling liquids in refrigerators, oil-based electric heaters) and outdoor use in close systems with the minimal release (e.g. hydraulic liquids in automotive suspension, lubricants in motor oil and brake fluids).
Release to the environment of Dipropylene Glycol can occur from industrial use: industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal). Another release to the environment of Dipropylene Glycol is likely to occur from: indoor use in long-life materials with a high release rate (e.g. release from fabrics, textiles during washing, removal of indoor paints), outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials), indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment) and outdoor use in long-life materials with high release rate (e.g. tyres, treated wooden products, treated textile and fabric, brake pads in trucks or cars, sanding of buildings (bridges, facades) or vehicles (ships)). Dipropylene Glycol can be found in products with material based on: fabrics, textiles and apparel (e.g. clothing, mattress, curtains or carpets, textile toys) and paper (e.g. tissues, feminine hygiene products, nappies, books, magazines, wallpaper).
Widespread uses by professional workers
Dipropylene Glycol is used in the following products: paper chemicals and dyes, washing & cleaning products, inks and toners, polymers, non-metal-surface treatment products and cosmetics and personal care products.
Dipropylene Glycol is used in the following areas: printing and recorded media reproduction, mining, agriculture, forestry and fishing and municipal supply (e.g. electricity, steam, gas, water) and sewage treatment.
Dipropylene Glycol is used for the manufacture of plastic products, chemicals and pulp, paper and paper products.
Another release to the environment of Dipropylene Glycol is likely to occur from outdoor use, indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), outdoor use in close systems with minimal release (e.g. hydraulic liquids in automotive suspension, lubricants in motor oil and brake fluids) and indoor use in close systems with the minimal release (e.g. cooling liquids in refrigerators, oil-based electric heaters).
Formulation or re-packing
Dipropylene Glycol is used in the following products: paper chemicals and dyes, inks and toners, polymers, washing & cleaning products.
Release to the environment of Dipropylene Glycol can occur from industrial use formulation of mixtures and formulation in materials.
Uses at industrial sites
Dipropylene Glycol is used in the following products: polymers, paper chemicals and dyes, inks and toners, washing & cleaning products, non-metal-surface treatment products, textile treatment products and dyes and pH regulators and water treatment products.
Dipropylene Glycol is used in the following areas: printing and recorded media reproduction and mining.
Dipropylene Glycol is used for the manufacture of chemicals, pulp, paper and paper products, plastic products and textile, leather or fur.
Release to the environment of Dipropylene Glycol can occur from industrial use: in processing aids at industrial sites, of substances in closed systems with minimal release and for thermoplastic manufacture.
Uses
Dipropylene Glycol finds many uses as a plasticizer, an intermediate in industrial chemical reactions, as a polymerization initiator or monomer, and as a solvent. Its low toxicity and solvent properties make it an ideal additive for perfumes and skin and hair care products. It is also a common ingredient in commercial fog fluid, used in entertainment industry fog machines.
Dipropylene Glycol is a colourless, viscous, practically non-toxic and slightly hygroscopic liquid;
melting point -78 C,
boiling point 231 C,
specific gravity 1.023.
Dipropylene glycol is miscible in water, alcohols, esters and almost organic solvents and various vegetable oils. It is produced during the manufacture of propylene glycol from propylene oxide along with tripropylene glycol and higher glycols. Dipropylene Glycol is used as a solvent, coupling agent and chemical intermediate. Dipropylene glycol is used as a component in the production of unsaturated polyester resins, alkyd resins, polyurethane polyols, textile auxiliaries and Dibenzoate plasticisers. It is an ingredient of cutting oils, functional fluids, industrial soaps, agricultural insecticidal formulations, defoamers, cosmetics and fragrances. It is used as an additive for carburettor fuels as a lubricant and anti-freezing agent. Dipropylene glycol is used as a solvent for printing inks, cellulose acetate, nitrocellulose, lacquers and coatings. In the refinery industry, it is used as an extraction solvent to extract aromatics.
Propylene glycol is a synthetic liquid substance that absorbs water. Propylene glycol is also used to make polyester compounds and as a base for deicing solutions. Propylene glycol is used by the chemical, food, and pharmaceutical industries as an antifreeze when leakage might lead to contact with food. The Food and Drug Administration (FDA) has classified propylene glycol as an additive that is "generally recognized as safe" for use in food. It is used to absorb extra water and maintain moisture in certain medicines, cosmetics, or food products. It is a solvent for food colours and flavours, and in the paint and plastics industries. Propylene glycol is also used to create artificial smoke or fog used in fire-fighting training and in theatrical productions. Other names for propylene glycol are 1,2-dihydroxypropane, 1,2-propanediol, methyl glycol, and trimethyl glycol. Propylene glycol is clear, colourless, slightly syrupy liquid at room temperature. It may exist in air in the vapour form, although propylene glycol must be heated or briskly shaken to produce a vapour. Propylene glycol is practically odourless and tasteless.
Its low toxicity and solvent properties make it an ideal additive for perfumes and skin and hair care products.
It is also a common ingredient in commercial fog fluid, used in entertainment industry fog machines.
Dipropylene glycol is a compound that plays a role in the chemical makeup of most fragrances. It is used to bind and carry the fragrance elements of a perfume, usually one or more essential oils or fragrance oils.
Dipropylene glycol is a type of organic chemical compound that is frequently used as solvent. It comes in two grades, dipropylene glycol (industrial grade) and dipropylene glycol (fragrance grade). Only the fragrance grade is appropriate for use in perfumes.
Dipropylene glycol, fragrance grade, is used as a solvent due to the fact that it is odourless, colourless and has a high boiling point and low toxicity. Not only can it act as a carrier, but 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. Dipropylene glycol can bind and carry both essential oils and fragrance oils (blended essential oils).
The compound works in perfumes due to its ability to help to attach to the fragrance molecules and to make them slower to disperse. The strength of a perfume can be changed by raising or lowering the ratio of dipropylene glycol in the formula.
What Is Dipropylene Glycol?
Dipropylene glycol is a type of alcohol that is used in cosmetics and skincare products to improve the texture and stability of the formulation.
It is mainly used as a solvent, viscosity-decreasing agent, masking agent, and fragrance ingredient.
Di propylene 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 that is a very useful reactive intermediate in a range of industries.
Dipropylene glycol is a member of the glycol class of compounds.
Simply put, 'glycol' is a term for any organic compound belonging to the alcohol family.
A glycol, which may also be referred to as a diol, is comprised of two hydroxyls groups attached to different carbon atoms.
There are many different types of compounds that belong to this family, such as butylene glycol, polyethylene glycol, ethylene glycol, and more. Dipropylene glycol is a colourless, nearly odourless liquid with a high boiling point and low toxicity.
In addition to use in the cosmetic industry, dipropylene glycol finds many uses as a plasticizer and an intermediate in industrial chemical reactions.
How is it produced?
Di propylene glycol is produced as a byproduct of propylene glycol production which occurs in a propylene oxide hydrolysis process. Tri propylene glycol is another by-product of this process.
It is estimated that the worldwide capacity for di propylene glycol production is approximately 107,000 tonnes per annum.
Dipropylene Glycol, Regular Grade, is used as a solvent, coupling agent and chemical intermediate.
Typical applications include:
1. Esterification with benzoic acid to make dipropylene glycol dibenzoate for plasticizers.
2. A reactant in unsaturated polyester resins to add flexibility and hydrolytic stability to the finished resin.
3. Esterification with acrylic acid to make dipropylene glycol diacrylate for radiation cured resin formulations.
4. In dicyclopentadiene-based unsaturated polyester resin systems to add flexibility.
5. An initiator for urethane polyol synthesis using epoxides, and for the polyol in rigid polyurethane foams.
Dipropylene Glycol's excellent solvency for certain oils, low evaporation rate and low toxicity lend its use in brake fluid formulations, cuttings oils, textile lubricants, printing inks, coatings, industrial soaps and as a solvent for agricultural and insecticidal formulations.
A high-purity product, designed for use in odour-sensitive applications, such as fragrances and cosmetics. The material, a distilled product with purity greater than 99.5% than dipropylene glycol, is a liquid that is colourless, water-soluble, hygroscopic and nearly odourless. This grade of DPG was developed to meet the needs of manufacturers who require consistently high quality for their fragrances and personal care products.
Uses:
Perfumes and colognes
Skincare – creams, lotions, sun-care products
Deodorants/antiperspirants – roll-on, stick deodorants
Haircare – shampoos, conditioners, styling, colouring product.
Shaving products – creams, foams, gels, after-shave lotions
Bath and shower products
Benefits:
Low odour
Low skin irritation potential and low toxicity
Excellent co-solvency for water, oils and hydrocarbons
Kosher and halal certified
Traceable through the entire supply chain
Manufactured in compliance with strict Cosmetics Good Manufacturing Practices
How is it stored and distributed?
Di propylene glycol is generally stored and distributed in stainless steel, aluminium or lined tank cars, tank trucks, or drums. It has a flash point of 124 °C (closed cup) and a specific gravity of 1.023 and is not classified as dangerous for any mode of transport.
What is Di Propylene Glycol used for?
Di propylene glycol finds use as a chemical intermediate across a range of industries. It is used as a component in the production of high volume plasticiser and, indeed, 38% of DPG is consumed in this process. It is also an initiator in urethane polyols and a reactant in unsaturated polyurethane resins where it adds flexibility and hydrolytic stability. It is also used for cutting oils, in hydraulic brake fluid production, and is a solvent for agricultural chemicals such as insecticides. It is also used as a solvent for printing inks, nitrocellulose, cellulose acetate, lacquers and coatings. It is an ingredient in industrial soaps and also has a role in the refining industry where it is used as an extraction solvent to extract aromatics.
There is also a Fragrance Grade of di propylene glycol which is used in the cosmetics industry where it is an additive in perfumes, and in skin and hair care products, where it binds and carries the fragrance elements of the perfume being used.
Why Is Dipropylene Glycol Used?
In cosmetics and skincare products, dipropylene glycol functions as a solvent, viscosity-decreasing agent, masking agent, and fragrance ingredient.
Solvent
As a solvent, dipropylene glycol helps to dissolve or suspend other ingredients in a formulation without altering the other ingredients. Dipropylene glycol allows for an even distribution of all ingredients in a cosmetic formulation and provides appropriate consistency for the product.
Texture
Furthermore, solvents like dipropylene glycol are used to thin out formulations and decrease viscosity. The term viscosity corresponds to the concept of the thickness of a product. Decreasing the viscosity of a formulation makes the product more spreadable when applied to the skin or hair. Solvents can also increase the efficacy of active ingredients in a product formulation by enhancing their absorption through the skin.
Masking
Dipropylene glycol also functions as a masking agent in cosmetics and personal care products.
A masking agent is used to disguise the natural smell of the active ingredients, especially those that have an unpleasant smell.
Sometimes, a masking agent can make a product smell so 'clean' that consumers think the product is fragrance-free.
Use:
It also has uses in cosmetics and commercial fog fluid.
Dipropylene glycol is a mixture of three branched isomers of bis(hydroxypropyl) ether.
Dipropylene glycol is produced as a byproduct or coproduct in the manufacture of propylene glycol.
Dipropylene glycol is a colourless, nearly odourless, and slightly viscous liquid with a high boiling point.
It is completely soluble in water, and can also dissolve oils.
In addition, dipropylene glycol is hygroscopic and acts as a humectant, which means it absorbs water and increases hydration in products.
Dipropylene glycol also functions as a plasticizer and as a plasticizer intermediate in the formation of polyurethane polyols to improve flexibility and increase resistance to cracking at low temperatures.
A plasticizer is a substance that is added to a material to alter its physical properties, mainly to increase flexibility or decrease viscosity.
These properties make dipropylene glycol a multifunctional ingredient used in a variety of applications and product sectors.
Dipropylene Glycol (DPG), Regular Grade, is a co-product from the manufacture of mono propylene glycol, involving the high temperature and high-pressure hydrolysis of propylene oxide (PO) with excess water.
What is Dipropylene Glycol (DPG)?
Dipropylene Glycol (DPG) is a derivative of propylene oxide (PO) and is produced in a two-step process.
The first step is the reaction of PO with water into a mixture of Monopropylene glycol (MPG) and Dipropylene Glycol (DPG) and the second step is the distillation and purification of the mixture into its two separate components, with MPG being the main component.
It is highly hygroscopic and miscible in all ratios with water and most organic solvents.
How is Dipropylene Glycol (DPG) Used?
Industrial uses of Dipropylene Glycol (DPG) include as a raw material to produce polymers such as polyester and alkyd resins or as a plasticizer in other polymers, for example, PVC.
Dipropylene Glycol (DPG) can also be a component in cleaning agents and printing inks or act as a carrier in many other formulations; for example, personal care products such as fragrances, soaps and cosmetics.
Typical Applications
-Haircare (shampoos, conditioners, styling, colouring products).
-Bath&Shower products.
-Potpourri.
-Eye and facial makeup.
-Fragrances and perfumes.
-Bodysprays.
-Skincare (creams, lotions, sun-care products).
-Room sprays.
-Shaving creams, gels, foams and after-shave lotions.
-Reed diffuser oils (typically 60-65% of oil is Dipropylene Glycol (DPG)).
-Oil burners.
Dipropylene Glycol (perhaps better known as Dipropylene Glycol (DPG)) is fragrance grade and is commonly used as a carrier for fragrances, perfumes and colognes. Dipropylene Glycol (DPG) is an excellent fragrance carrier. Dipropylene Glycol (DPG) exhibits good co solvency with water, soap bases, oils, essential oils and absolutes with minimal odour, low skin irritation potential, low toxicity and consistent isomer distribution, making it ideal for use in perfumes and colognes, skincare (creams, lotions, sun care products), deodorants and antiperspirants (roll-on, stick deodorants), hair care (shampoos, conditioners, styling, colouring products), shaving products (creams, foams, gels, aftershave lotions) and bath and shower products.
Dipropylene glycol is used primarily as an industrial intermediate but is also used as a substance in consumer products, and as an ingredient in pesticide formulations.
Uses of dipropylene glycol as a substance capitalize on its superior performance as a plasticizer as well as properties (e.g., high solvency, high viscosity) that permit dipropylene glycol to act as a functional ingredient of fluids.
Dipropylene glycol is a substance to produce polymers such as polyester and alkyd resins, and a plastifier used to produce other polymers, for instance, PVC. Dipropylene glycol can also be the component of detergents and printing inks. Low toxicity and a high degree of solubility make Dipropylene glycol an ideal additive to perfume and skin and hair care products. Dipropylene glycol is also often a component of what is known as artificial fog used in the entertainment industry.
One of the most important properties of dipropylene glycol is that it does not rust. Dipropylene glycol has high flash and low vapour pressure. Thanks to this aspect, Dipropylene glycol can be easily processed in commercial areas. Dipropylene glycol is ideally used especially in Dipropylene glycol storage tanks. Polyester resins formed using dipropylene glycol are much more crystalline and much more flexible. We see that this substance is used effectively in many areas. However, people should also be careful when using substances such as Dipropylene glycol. Otherwise, Dipropylene glycol may cause negative results. Dipropylene glycol is used as a transfer fluid in both low and high-temperature applications. Dipropylene glycol is used as an antifreeze or reaction medium in hot environments in the synthesis of drugs. Dipropylene glycol has a germicidal effect and is therefore used as an air cleaner. Dipropylene glycol is used as a solvent material in many industries. Dipropylene glycol is used as an additive in many industrial areas. Dipropylene glycol is used as a solvent agent in the production of deodorants and fragrances. Dipropylene glycol is also used as an additive in hair care products and many important products used in baths.
Dipropylene glycol also decreases the viscosity of liquids, which makes skincare and hair care products thicker and less runny. Aside from personal care products, dipropylene glycol has many other uses. Companies can put Dipropylene glycol into hydraulic brake fluid formulations, cutting oils, textile lubricants, coatings, industrial soaps, and agricultural solvents such as pesticides. That’s why Dipropylene glycol has such widespread use for many industrial processes.
Dipropylene Glycol is often used as a carrier or dispersant. As Dipropylene Glycol has excellent solvency and a low evaporation rate it can be used in formulations as a solvent, emollient or emulsion stabiliser. Dipropylene Glycol can also act as a preservative in some formulations due to its anti-microbial activity. Dipropylene glycol [HO- (CH3-CHCH2O) 2-H] is a clear, colorless, slightly viscous liquid that is much less hygroscopic than other common glycols. Dipropylene glycol is completely miscible with water and ethanol, benzene, toluene, castor oil, carbon tetrachloride, many organic compounds and Dipropylene glycol is an excellent solvent. Dipropylene glycol is also an excellent cross-solvent or Dipropylene glycol co-solvent. Dipropylene glycol is a dihydroxy alcohol and undergoes reactions peculiar to such compounds. The major commercial importance of dipropylene glycol is the reactions in which various ether and ester derivatives are formed. Dipropylene glycol diesters prepared by the reaction of dipropylene glycol and acids can be used as cosmetic ingredients with plasticizers, fuel additives, resins and dyes. A particularly important reaction of dipropylene glycol is done with unsaturated dibasic acids such as maleic acid or fumaric acid. Unsaturated polyester resins derived from dipropylene glycol can then be crosslinked with styrene.
Dipropylene glycol as a solvent is a component of hydraulic brake fluids, cutting oils and textile oils. Dipropylene glycol inks are an excellent solvent, especially for steam set types and for those used in food packaging where residue and odour should be free.
Dipropylene glycol is stainless. Dipropylene glycol has low vapour pressure. Also, Dipropylene glycol has a high flashpoint. As a result, Dipropylene glycol is easily processed under ordinary commercial conditions. Dipropylene glycol mild steel is satisfactory for storage tanks except where colour requirements are critical. Resin-lined steel, stainless steel or aluminium tanks provide protection against discolouration and small amounts of iron contamination. It is generally not necessary to cover storage tanks with inert gas.
Polyester resins prepared from dipropylene glycol tend to be more flexible and less crystalline than those prepared from ethylene glycol.
Dipropylene glycol polyesters are not as sensitive to water as diethylene glycol polyesters. Urethane ranging from rubbery plastic to foams is synthesized from diisocyanates and polyesters containing dipropylene glycol.
Dipropylene glycol is also used in many products in the cosmetic field. Dipropylene glycol is found in sunscreens, moisturizers and many other products. Dipropylene glycol is also used in the production of cleaning materials. Dipropylene glycol is used as a plasticizer in the plasticizer and polymer industry, in cosmetic polyester and alkyd resins, in solvents, in hard plastics. Dipropylene glycol can be used to reduce the gelation temperature, providing faster and less cost. Dipropylene glycol is used in flooring and indoor surfaces. It is used in dipropylene glycol rubbers. Dipropylene glycol is used in polyurethane-based adhesives, fillers and sealants. Dipropylene glycol is used in the automotive industry. Dipropylene glycol is used in the printing ink industry and as a solvent for stamping inks, as a component in hydraulic fluids, as a solvent in water/oil systems. Dipropylene glycol is used in the leather industry as well as hydraulic fluid components and coating compounds. Dipropylene glycol is also used as a gloss and flow corrector in dipropylene glycol, emulsion paints and baking finishes.
