Deodorants – Closer look at Propylene Glycol


What is Propylene Glycol?
It is a clear, colorless, odorless and tasteless syrupy liquid. It absorbs moisture and is completely soluble in water. It is a synthetic liquid that can be derived from petroleum or vegetable oils. It is commonly used in a variety of consumer products, including; deodorants, pharmaceuticals, moisturizing lotions, fat-free ice cream, sour cream and other food products.

The Green Rift uses a U.S.P. Certified propylene glycol derived from vegetable oil, generally a blend of many oils including sustainably resourced palm, corn, sunflower seed and coconut oils. Our propylene glycol meets purity standards that allow for
its use in both human/pet foods as well as pharmaceuticals and cosmetics. It is recognized by the US Food and Drug Administration (FDA), the World Health Organization (WHO) as a Generally Recognized As Safe (GRAS), as a safe and non-toxic ingredient additive. It is USDA certified as a Biobased Product, sourced from renewable resources.

What does Propylene Glycol do?
Propylene glycol helps form the base for our deodorants. Sodium stearate, a naturally occurring salt of stearic acid, combines with propylene glycol to provide a gel or base. This gel gives our stick deodorant it's "base" structure, so it can be properly applied.

Possible Alternatives?
The Green Rift has investigated using vegetable glycerin & 1,3-propanediol (aka. NatureSilk TM) for potential alternatives to propylene glycol. Using 100% vegetable glycerin, yielded an unsatisfactory product that facilitated the growth of odor-causing bacteria and was found to be "soft & mushy" as a deodorant stick. Therefore, this wasn't a viable alternative.

The Green Rift is currently researching another possible green alternative to propylene glycol, being 1,3- propanediol or commonly known as Propanediol. This ingredient is a 'greener' alternative 100% naturally derived, sourced from corn (Zea Mays); made by the fermentation of corn sugars. However, the process has a large carbon footprint and is non-sustainably sourced. Our belief is to take care of our planet, use the best ingredients that Mother Earth provides, while leaving behind a small carbon footprint.

- J


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