Propeylene Glycol
Specifications & product data:

Propeylene Glycol is used in industrial / commercial applications and glycol systems. In a Glycol system, ethylene or a propylene glycol-water solution will be circulated throughout the building or through cooling/heating coils in an HVAC system. Glycol ensures space cooling/heating is supplied without the inherent risk of freeze damage.

Propeylene Glycol is considered "food safe". In certain applications that may have a chance of possible contact of the coolant with foods or beverages, Propylene Glycol should be choose for the application. Information about this food safe substance can be obtained through the FDA.

The Environmental Protection Agency ( EPA ) has listed Ethylene Glycol as a hazardous chemical. It has a reportable quantity ( RQ ) for spills consisting of 5,000 LBS or more. Propylene Glycol does not appear on this hazardous chemical list. If toxicity or immediate environmental concern is an issue, propylene glycol should be the product of choice for the application.

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Ethylene Glycol
Specifications & product data:

Industrial / Commercial Ethylene Glycol is a heat transfer and anti-freeze fluid containing a balanced inhibitor system that will protect common metals of construction. Ethylene Glycol ensures heating and comfort cooling systems operate properly by aiding with freeze protection. Ethylene Glycol fluids are normally preferred over Propylene Glycol solutions because of their more desirable physical properties at lower temperatures.

Ethylene Glycol will lower the freezing point of water and is applicable over a wide range of temperatures from -60ºF - +300ºF depending on the system and glycol concentration. Propylene Glycol solutions increase in viscosity at lower temperatures and their use in industrial systems operating in the range of 0ºF or below should be evaluated in regards to the pumping requirements. Ethylene Glycol might be a better choice when a lower viscosity is needed at a lower temperature.

Ethylene Glycol is listed by the EPA as a hazardous chemical and has a reportable quantity ( RQ ) of 5,000 pounds or more. Ethylene Glycol should be used for applications where toxicity and environmental concerns are not an issue. The physical properties of Ethylene Glycol make it a more suitable choice where applications permit or are more lenient in hazardous chemical concerns.

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