Food Grade Propylene Glycol may be used as a low temperature heat-transfer medium in brewing and dairy cooling systems and in other refrigeration equipment having cooling coils which are in direct contact with beverages. In aqueous solution, it displays excellent antifreeze properties.
Propylene Glycol offers a number of advantages over secondary refrigerants such as chilled water or calcium chloride brine. Because of the extremely low toxicity of the glycol, there is less risk that the product will be unusable if contamination has occurred through small leaks in the system.
A 30% concentration of glycol permits coolant temperatures down to about -12°C in contrast, chilled water permits tempertures no lower than 1°C. For applications requiring even lower temperatures, a 50% concentration of proplylene glycol may be used which can be operated at -33°C.
What is Polypropylene Glycol Used For?
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. Jan 21, 2015.
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