I know not to mix it, supposed to crud up or something. Drain the water. If glycol must be site mixed, it should only be done with deionized water.” Hogle explained that ethylene and propylene glycol have different fluid, toxicity, and heat transfer characteristics that will actually prevent the system from operating correctly when mixed. just wondering thanks. … Drain the coolant. Ethylene glycol and water can be mixed in any ratio because of their compatibility and makeup. $\begingroup$ Thank you for your help. Propylene glycol (IUPAC name: propane-1,2-diol) is a viscous, colorless liquid, which is nearly odorless but possesses a faintly sweet taste.Its chemical formula is CH 3 CH(OH)CH 2 OH. It freezes at 32°F (0°C) and boils at 212°F (100°C). $\endgroup$ – Margaret Oct 13 '17 at 15:35 In the refractometer field of view at the right you can see an area of grey scale and an area of white. It can even cause the heart to stop. What did I do wrong? A balanced inhibitor system, to protect common metals of construction. Ethylene Glycol: Ethylene glycol is mainly used in antifreeze formulations and as a raw material in the manufacturing of polyesters such as polyethylene terephthalate (PET) in plastic industry. Propylene glycol can also become more viscous than ethylene, even slightly affecting the heat exchange rate when used at very low temperatures. If propylene glycol is on skin, say when giving dermal therapeutics, it can be seen in the blood and in the urine at low levels. Propylene glycol is an alcohol that absorbs water and mixes completely with many solvents. It is viscous than water; it is considered as a syrup since it flows very slowly. Ethylene or propylene glycol, to depress the freeze point of the fluid. From the shoutbox: Quote:» Alpha Dream - 10-23-8:04 pm -- Isopropyl myristate is something they add to alcohol to denature it.It's similar but thicker than PG. How long does it take and will a flush totally stop its reaction. Fortunately, there are a number of reliable methods available to evaluate antifreeze quality. What is antifreeze? Operating an automobile without proper antifreeze can cause permanent damage, so testing ethylene and propylene glycol is an important component of proper vehicle maintenance. Propylene glycol is used in antifreeze because, like ethylene glycol, it lowers the freezing point of water by disrupting the formation of ice crystals. This is ethylene-based glycol and it is the standard process/industrial antifreeze additive. Carveaholic. It has something to do with different specific gravity. So figure if they use 5% of that stuff it's equal to 10% PG. Although both propylene glycol and ethylene glycol have a large number of applications across a variety of industries and uses including cosmetics and preservatives (propylene glycol) and within the manufacture of resins, inks and polyethylene terephthalate (ethylene glycol) both have a common use within antifreeze and coolant mixes. Flowcool-Plus & Flowcool FS These are propylene-based glycols; FlowCool FS has been tested by the National Sanitary Foundation. There have been a couple of cases where children receiving high doses had problems with heart function too. Kal Row Member Posts: 1,519. No, you will not need another heating system. You should not mix propylene glycol and ethylene glycol, because they can sometimes gel up, and subsequently block your cooling system, which will lead to overheating and potentially an expensive fix. Ethylene glycol can be found in highly concentrated amounts in automotive antifreeze and some windshield de-icing products and in small amounts in household products such as printer ink, interior and exterior paint, spackle, etc. Then I noticed the sticker on the machine … However if you use a 50/50 mix ethylene glycol antifreeze with a specific heat of .85 (or 15% less than pure water) this would mean that the coolant system temperature is going to increase by 1.15 times the amount of heat that was rejected into the coolant (1 + 1-.85) x 10F. Many glycol vendors will provide glycol that is already pre-mixed. Antifreeze can have two active ingredients: either ethylene glycol or propylene glycol. It is primarily used to prevent water from freezing and increase its boiling point for automobiles. I came across this this past weekend when refilling my cooling system. What is the likely result of mixing some proportionately small amount of a 50/50 water/sodium hydroxide solution (let's say 10% or less) with a 50/50 water/propylene glycol solution in a closed container with a fair amount of room for expansion (perhaps also with pressure venting)? Here it shows that the solution could be 30% Propylene Glycol. This is the best way to add glycol as it guarantees the correct glycol concentration, and that the water used in the mixture is free of contaminants. Containing two alcohol groups, it is classed as a diol.It is miscible with a broad range of solvents, including water, acetone, and chloroform.In general, glycols are non-irritating and have very low volatility. Ethylene Glycol is used as an anti-freeze, but it has a high toxicity level which may be harmful to your skin. However, while ethylene glycol and propylene glycol are both biodegradable, propylene glycol degrades at a slower rate and has a greater biochemical oxygen demand. Like ethylene glycol, propylene glycol may also be used as antifreeze and can be found in high concentrations in RV and “pet-friendly” antifreezes. When it is mixed with water, it disturbs the formation of ice. Therefore, it can still be harmful to the environment. If 100 per cent glycol is purchased then on-site mixing is required, and this can cause issues if not done properly. The term “glycol” is used when there are two hydroxyl groups present in neighboring carbon atoms. * propylene glycol antifreeze is less toxic. Antifreeze for Bobcat S300 - Propylene or Ethylene Glycol? On … Steady-state temperatures of dry ice–ethanol and ethylene glycol mixtures. What spp is ethylene glycol poisoning common? But they have completely different structures and attributes. In general, propylene glycol is not readily absorbed through the skin unless it also is mixed with another acid. Propylene glycol has the E-Number E1520. The melting point of propylene glycol is about -59 o C. 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