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DiPropylene Glycol

What is dipropylene glycol?
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 colorless, nearly odorless liquid with a high boiling point and low toxicity.

What are the different types of dipropylene glycol? Dipropylene Glycol comes in regular grade (DPG) and is used as a reactive intermediate in the manufacturing of high-performance unsaturated polyester resins, polyurethanes and plasticizers. It has great solvency, a low evaporation rate, low toxicity, high viscosity and low odor, making it a chemical intermediate of choice for many industrial applications.

On the other hand, dipropylene glycol LO+ (DPG LO+) is a high-purity product, and developed for manufacturers who require a consistent high quality for their fragrances and personal care products. The material, a distilled product with purity greater than 99.5% as dipropylene glycol, is a liquid that is practically odorless, colorless, water-soluble and hygroscopic.

Where is dipropylene glycol commonly used?
DPG is used as:
  • High-volume plasticizer
  • Reactant in unsaturated polyurethane resins, adding flexibility and hydrolytic stability
  • Initiator in urethane polyols, and as the polyol itself in some rigid polyurethane systems
  • Reactive diluents in radiation-cured resins and coatings, cutting viscosity and enabling easier application
Other effective uses of DPG are:
  • Hydraulic brake fluid formulations
  • Cutting oils
  • Textile lubricants
  • Printing inks
  • Coatings
  • Industrial soaps
  • Solvents for agricultural chemicals such as insecticides
DPG LO+ provides excellent co-solvency for water, oils and hydrocarbons, with minimal odor, low skin irritation potential, low toxicity and consistent isomer distribution, making it ideal for use in:
  • 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
How safe is dripopylene glycol?
Dipropylene glycol (DPG) is cleared for various indirect uses under Food Additive Regulations (Title 21, Code of Federal Regulations) promulgated in accordance with the U.S. Food, Drug and Cosmetic Act as amended. They recommend that DPG LO+ grade material be used in these application areas. NOTE: For legal reasons, please consult an expert if using DPG for any application prior to using it or ordering it. We are only providing reference guidelines about the material.

What is the shelf life of your products?
DPG - 12 months - Bulk storage in lined or stainless steel tanks; drums
DPG - 6 months - Bulk storage in carbon steel tanks
DPG LO+ - 12 months - Bulk storage in lined or stainless steel tanks;

Where can I buy dipropylene glycol?
You can buy online here at Buy Dipropylene Glycol of ChemWorld. All products featured on site are in stock and ready to be shipped within 24 hours.

What is the difference between Dipropylene Glycol and Propylene Glycol?
There is a big difference. These are two different chemicals and are not interchangeable. Propylene Glycol is not dipropylene glycol.
DiPropylene Glycol - 1 Gallon
DiPropylene Glycol (Fragrance Grade) - 1 Gallon
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DiPropylene Glycol Fragrance Grade - 1 Gallon 
ChemWorld DiPropylene Glycol
DiPropylene Glycol (Fragrance Grade) - 5 Gallons
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DiPropylene Glycol Fragrance Grade - 5 Gallons 
Fragrance Grade DiPropylene Glycol
DiPropylene Glycol (Fragrance Grade) - 55 Gallons
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DiPropylene Glycol Fragrance Grade - 55 Gallons 

DiPropylene glycol Uses

1. Make your own Deodorant

DPG or otherwise know as Dipropylene glycol is a fragrance fixative as well as a humectant. DPG ingredient will keep your fragrance around all day. PG otherwise known as Propylene glycol can be used in place of DPG if you do not have it.

Items needed, 80% dipropylene glycol, 8% sodium stearate, 6% witch hazel, 2% aloe vera extract, 2% turkey red oil (sulfonated castor oil - emulsifier), 1% essential or fragrance oil, 1% polysorbate 20

1) Weigh the dipropylene glycol and sodium stearate in a heatproof container
2) Heat until the sodium stearate is melted.
3) Add the witch hazel, aloe vera, and turkey red oil (optional) and mix until fully blended.
4) Mix the polysorbate 20 and essential or fragrance oil in a small container, and add it to the mixture after you remove it from the heat.
5) Pour into a deodorant container and let sit until solid. 

You can try different fragrances such as, tea oil tree or green bamboo fragrance oil.
Polysorbate 20 will make it sticky, so you will need to add a detackifier and glide enhancer!  Try a PEG or Crodamol PMP at 2% in place of the turkey red oil. Tinosan at 0.3% twill offer some anti-bacterial and preserving properties.  Also, Polysorbate 20 in the mix as the water soluble ester will help solubilize the fragrance oil.

One suggestion is including 2% Iamolin in place of water.  It is water soluble ester and to add some emolliency. If you don't have witch hazel or aloe vera substitute hydrosol, alcohol, or water.

2. How to Make Reed Diffusers

Add 6 parts Dipropylene glycol to 4 parts essential oil.

Dipropylene glycol is a byproduct of the propylene glycol. It works well as a solvent of essential and commonly used with fragrance oils. Dipropylene glycol is not acutely toxic by oral, dermal, or inhalation exposure. It is also a common ingredient in commercial fog fluid, used in entertainment industry smoke and haze machines.

3. How to Make Square Reed Diffuser with Citrus Recipe

DIY Reed Diffusers- EW Kitchen Chemistry

1) Add 1/2 cup plus 2 Tablespoons Dipropylene Glycol
2) Add 1/4 cup Lime Essential Oil
3) Add 1 Tablespoon Litsea Essential Oil
4) Add 3 Tablespoons Orange 5 Fold Essential Oil
5) Pour into Square Diffuser Bottle
6) Add reeds and use.

4. How to Make Round Reed Diffuser with Well Being Essential Oil Blend

1) Add 1/2 cup Dipropylene Glycol
2) Add /4 cup plus
3) Add 3 Tablespoons of Well-Being Essential Oil Blend

5. How to Make Cedar Oil

If you want to clean your house with natural products, try this formula.  By adding natural essential oils into the solutions to will add natural fragrances through out your home.

1)  Add 2 oz. of cedar wood oil into the bottle through a funnel
2)  Add 1 oz. of balsam fir essential oil into the bottle
3)  Add 4 oz. of dipropylene glycol into the bottle
4)  Mix well or shake.

What is dipropylene glycol?
Dipropylene glycol is a colorless, nearly odorless liquid with a high boiling point and low toxicity. Propylene glycol and Dipropylene glycol are derived from the same chemical process, with water added to propylene oxide. However, the molecular structure and chemical composition of each is very different.

What are the common uses of dipropylene glycol?
Dipropylene glycol is used as a plasticizer for industrial chemical reactions, as a polymerization initiator, and as a solvent.  It is a common ingredient for commercial fog fluids used in fog machines, plus it is also an ideal additive for perfumes, skin and hair products.

What beauty and skincare products use dipropylene glycol?
Dipropylene glycol is commonly used as an ingredient in the formulation of:
    * 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

Why is dipropolyne glycol used in these products?
As an organic chemical compound, it is frequently used as solvent. It acts as a carrier as well as a diluent, or a compound used to dilute the strength of fragrance oils. Dipropylene glycol can bind and carry both essential oils and fragrance oils (blended essential oils).

In perfumes, this compound works by 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.

What are the different grades of Dipropylene Glycol?
Dipropylene Glycol (DPG) comes in two grades: fragrance grade (DPGF) and industrial grade. Dipropylene glycol, fragrance grade is commonly used as a carrier for fragrances. Dipropylene glycol, industrial grade (DPG), with almost identical properties, is frequently used in resins and cleaner formulations where low odor is not as critical.

How safe is it to use Dipropylene Glycol?
DPGF is reported as an ingredient in cosmetic formulations, including hair care and bath products, perfumes, facial makeup, deodorants, shaving and skin care preparations, ranging up to 50%. DPG has a relatively low hazard profile, based on a substantial toxicity database which has been summarized by the Cosmetic Ingredient Review Expert Panel.

How do I store Dipropylene Glycol?
Due to its low vapor pressure, toxicity and flammability, DPG presents no special handling problems. However, overexposure or spillage should be strictly avoided as a matter of good safety practice. DPG may require storage facilities designed to prevent moisture intrusion because of its hygroscopic nature. Storage vessels and transfer lines of mild steel may be used if slight increases in color and trace iron levels are not objectionable. Stainless steel, aluminum and/or mild steel vessels with baked phenolic or epoxy-phenolic linings are recommended to promote long-term storage and to maintain high quality.

+Joseph Zajac

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