What Is PG

What is PG? (Propylene Glycol)


Propylene Glycol is a liquid that is thin like water. It is used for carrying and diluting flavors for the e-liquid and is also used in foods and medicines, as a food coloring ingredient and additives in a variety of medications. Less vapor may be produced when flavoring is added because this would thin the PG out further. The higher the PG ratio is, the thicker the clouds will be that are produced. Some people, but not many, will experience some sensitivity to the PG. These symptoms could include the skin or throat being irritated. A lot of the individuals who have the sensitivity will still be able to use PG in lower amounts and not have any of the effects. Most e-liquid will be PG based


Where Does PG Come From?


The PG part of e-liquid is an organic compound that is synthetic, having the chemical formula of C3H8O2. The production of PG comes from propylene oxide, which is used for food. Some manufacturers will use the non-catalytic process with high temperatures that range from 200 degrees Celsius to 220 degrees Celsius, or 392 degrees Fahrenheit to 428 degrees Fahrenheit. Others will use the catalytic method in which the temperatures range from 150 degrees Celsius to 180 degrees Celsius, or 302 degrees Fahrenheit to 356 degrees Fahrenheit while having ion exchange resin present, a little bit of alkali, or sulfuric acid. The final product has 20% of propylene glycol, then 1.5% dipropylene glycol, and also has other polypropylene glycols in small amounts. PG is then further purified and will produce propylene glycol that is industrial grade around 99.5% or higher.


What are Other Uses of PG?


Other than e-liquid that most people are starting to relate the use of PG with, it can be utilized as solvents, humectants, and a preservative in tobacco products and food. PG will also appear in a variety of consumable items like drinks that are coffee based, ice cream, liquid sweeteners, soda, and dairy products that are whipped. Another use is lowering water's freezing point to be used as a fluid for de-icing in an aircraft. A frequent use is substituting ethylene glycol inside an environmentally friendly, low toxicity automotive anti-freeze. Another use is for winterizing a plumbing system in some vacant structures.