Propylene glycol is an alcohol that absorbs water and mixes completely with many solvents. Kal Row Member Posts: 1,519. There have been a couple of cases where children receiving high doses had problems with heart function too. Therefore, it can still be harmful to the environment. Can Prestone Dex-Cool be mixed with your basic NAPA Ethylene Glycol? Propylene glycol is used in antifreeze because, like ethylene glycol, it lowers the freezing point of water by disrupting the formation of ice crystals. What are the properties of ethylene glycol? 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. It can even cause the heart to stop. It provides better heat transfer parameters than water, and can be mixed with water to provide a variety of heat transfer characteristics. Ethylene or propylene glycol, to depress the freeze point of the fluid. Steady-state temperatures of dry ice–ethanol and ethylene glycol mixtures. just wondering thanks. While you might see propylene glycol described as an organic compound, this does not mean it’s naturally occurring. On the other hand, propylene glycol has very low-level toxicity for some skin conditions and is used in many cosmetics. Yes, Ethylene glycol and Propylene glycol are very similar chemically, therefore, can be mixed without any bad consequences for the engine. December 2004. ethelyne or propelyne cause the premixed "cryo-tech" stuff from herculese with PG has no warnings to that effect on the bottle . … Ethylene glycol is extremely toxic and can kill you. However, when considered the uses, both are used for somewhat same purposes. A balanced inhibitor system, to protect common metals of construction. Water / glycol can be heated by electricity, wood, pellets, natural gas, propane, fuel oil … Will I need another heating system ? Is the table still valid? Antifreeze can have two active ingredients: either ethylene glycol or propylene glycol. Propylene Glycol and Ethylene Glycol are commonly mistaken to be the same ingredient. Propylene glycol can also become more viscous than ethylene, even slightly affecting the heat exchange rate when used at very low temperatures. Antifreeze for Bobcat S300 - Propylene or Ethylene Glycol? 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. 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. $\endgroup$ – Margaret Oct 13 '17 at 15:35 FlowCool IG can be used in any application where low toxicity is not a requirement. This leads it to be used as an anti-freezing agent. 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. How long does it take and will a flush totally stop its reaction. 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. Propylene glycol has the E-Number E1520. * propylene glycol antifreeze is less toxic. Has anyone found a sytem with mixxed ethylene and propylene glycol in it. Flowcool-Plus & Flowcool FS These are propylene-based glycols; FlowCool FS has been tested by the National Sanitary Foundation. The melting point of propylene glycol is about -59 o C. Since the vapour pressure of propylene glycol is negligible, it does not evaporate at a considerable degree. Or perhaps it could be approximately 30% Ethylene Glycol. 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. Animal studies show that high doses of propylene glycol can cause dangerously low heart rates and blood pressure. Thus, propylene glycol will remain in the environment longer than ethylene glycol and will consume more oxygen while it is being broken down. Carveaholic. 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. Since ethylene glycol can cause damage to the heart, nervous system and kidneys through prolonged exposure, you should consider propylene glycol your only option. July 6, 2016, 12:21am #2. Drain the water. On … Checker had Peak AntiFreeze on sale, two 50/50 mix gallons for $10. 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)? Ideally u should have 7ml alcohol to 3 ml PG, or 9 ml alcohol to 1ml DPG. If so got any picks and do you know how long it mixxed. It is primarily used to prevent water from freezing and increase its boiling point for automobiles. Fortunately, there are a number of reliable methods available to evaluate antifreeze quality. Propylene glycol is used in the “non-toxic” version of anti-freeze. Many glycol vendors will provide glycol that is already pre-mixed. When it is mixed with water, it disturbs the formation of ice. 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. 0. Joined: Sep 26, 2008 Messages: 393 Location: Canada. Lots of heat involved? If it is well designed a radiant floor system is powerful enough to be your only heating system. 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. Coolant: Ethylene Glycol vs Propylene Glycol In my quest to find maintenance products, I came across something I thought I would question here. Discussion in 'Skid Steers' started by swampdog, Aug 27, 2014. swampdog Senior Member. The table is for ethylene glycol, and I would like to use the less toxic propylene glycol. Switch off and let it cool down. The term “glycol” is used when there are two hydroxyl groups present in neighboring carbon atoms. with water and glycol, you get solution seperation and will still get icy chnks - wont bust your pipes - but the ice chunks can block stuff, not good for a sprinkler . - small molecular weight = poorly absorbed -> activated charcoal wont be very helpful - ethylene glycol -> Glycoaldehyde -> Glycolic Acid -> Glycoxalic Acid -> Oxalic acid -> binds serum Ca -> insoluble calcium oxalate crystals (monohydrate) & hypocalcemia. It has something to do with different specific gravity. $\begingroup$ Thank you for your help. Ethylene glycol can facilitate convective heat transfer in automobiles and liquid cooled computers. Glycol is a water-miscible coolant that is frequently used in heat transfer and cooling applications. In the refractometer field of view at the right you can see an area of grey scale and an area of white. What spp is ethylene glycol poisoning common? What did I do wrong? 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. This is ethylene-based glycol and it is the standard process/industrial antifreeze additive. I checked the anti-freeze freeze protection on the Bobcat and the tester only registers 10 degrees Fahrenheit - not nearly good enough for our area. I’ve got about a 50/50 mix in my truck now but friends tell me hat I have doomed my cooling system. Food Industry; Another testament to the non-toxic nature of PG is its use in the food industry where it serves as a humectant, solvent and preservative among other things. It freezes at 32°F (0°C) and boils at 212°F (100°C). The junction of these two determines the percent strength of a known Glycol. 0. Ethylene glycol and propylene glycol are organic compounds with alcohol functional groups. Anything toxic? Ethylene glycol and propylene glycol are the major constituents of antifreeze. Like ethylene glycol, propylene glycol may also be used as antifreeze and can be found in high concentrations in RV and “pet-friendly” antifreezes. It is important to note that you should never mix different types or brand names of glycol, as this leads to the product congealing and the clogging of filters in the refrigeration system —potentially causing problems with heat transfer and fluid flow. Their molecular formulas are different; thus they have some different physical properties. Step 1. Water is nature’s heat transfer fluid, a liquid used since the dawn of time to heat and cool. If 100 per cent glycol is purchased then on-site mixing is required, and this can cause issues if not done properly. Lot's of gas? It is viscous than water; it is considered as a syrup since it flows very slowly. Must I bring it in immediately for a flush? I just came to find that you can't use the same AntiFreeze tester for PROPYLENE glycol based antifreeze (Prestone) as ETHYLENE glycol based antifreeze (PEAK) even though they are both "Green". Ethylene glycol and water can be mixed in any ratio because of their compatibility and makeup. Rather the term organic compound refers to the fact that it contains carbon. What is antifreeze? Run engine until it gets hot. Step 1 Make a concentrated solution to combat wood rot. I came across this this past weekend when refilling my cooling system. 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. But they have completely different structures and attributes. Then I noticed the sticker on the machine … However, while ethylene glycol and propylene glycol are both biodegradable, propylene glycol degrades at a slower rate and has a greater biochemical oxygen demand. Huh? In general, propylene glycol is not readily absorbed through the skin unless it also is mixed with another acid. So figure if they use 5% of that stuff it's equal to 10% PG. Operating an automobile without proper antifreeze can cause permanent damage, so testing ethylene and propylene glycol is an important component of proper vehicle maintenance. Glycol comes in two varieties: ethylene glycol and propylene glycol. In one burn victim study, as long as blood concentrations were below 1.3 mg/mL the patients survived. Here it shows that the solution could be 30% Propylene Glycol. Kal Row Member Posts: 1,519. Ethylene Glycol is used as an anti-freeze, but it has a high toxicity level which may be harmful to your skin. My NAPA guy sold me the Prestone saying that that was the Nissan recommendation for my 2001 Frontier. Drain the coolant. No, you will not need another heating system. Fill with water. I know not to mix it, supposed to crud up or something. 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