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2. Propylene glycol - Wikipedia

   en.wikipedia.org/wiki/Propylene_glycol

   Propylene glycol (IUPAC name: propane-1,2-diol) is a viscous, colorless liquid. It is almost odorless and has a faintly sweet taste. ... or antifreeze solutions for ...

3. Antifreeze - Wikipedia

   en.wikipedia.org/wiki/Antifreeze

   Propylene glycol. Propylene glycol is considerably less toxic than ethylene glycol and may be labeled as "non-toxic antifreeze". It is used as antifreeze where ethylene glycol would be inappropriate, such as in food-processing systems or in water pipes in homes where incidental ingestion may be possible.

4. Glycol chiller - Wikipedia

   en.wikipedia.org/wiki/Glycol_chiller

   Propylene glycol, a food-grade antifreeze, is typically used when consumable products are involved. Before using glycol in the brewing process, check that propylene glycol is of USP grade to ensure it is recommended for food use.

5. Cryoprotectant - Wikipedia

   en.wikipedia.org/wiki/Cryoprotectant

   Conventional cryoprotectants are glycols (alcohols containing at least two hydroxyl groups), such as ethylene glycol [citation needed], propylene glycol and glycerol. Ethylene glycol is commonly used as automobile antifreeze; while propylene glycol has been used to reduce ice formation in ice cream.

6. Ethylene glycol - Wikipedia

   en.wikipedia.org/wiki/Ethylene_glycol

   There is a difference in the mixing ratio, depending on whether it is ethylene glycol or propylene glycol. For ethylene glycol, the mixing ratios are typically 30/70 and 35/65, whereas the propylene glycol mixing ratios are typically 35/65 and 40/60. It is important that the mixture be frost-proof at the lowest operating temperature. [24]

7. Coolant - Wikipedia

   en.wikipedia.org/wiki/Coolant

   It is usually used with additives, like corrosion inhibitors and antifreeze. Antifreeze, a solution of a suitable organic chemical (most often ethylene glycol, diethylene glycol, or propylene glycol) in water, is used when the water-based coolant has to withstand temperatures below 0 °C, or when its boiling point has to be raised.