Re: Hitachi Rear Projection TV
[QUOTE ]@RedCowboy: Just re-read your post... So it could be Glycerin, or it could be a combo or Propeline Glycol and Glycerin 70/30. Or Worse it could be Ethelyn Glycol, which is Toxic. Per
Need to ID "oil" in rear projection tv lens' (3) I repurposed | Electronics Forum (Circuits, Projects and Microcontrollers) I think I am going leave it alone.[/QUOTE]
I could have been a little more clear but I had forgotten exactly what it was, I would hope people would not drink some unknown substance found inside household electronics but you are right, it is better to be safe and spell it out. I did make an effort to warn you the old models had coolant inside.
The lens packages I use are from DLP projection TV's and they use a lamp not crt's.
It is almost always monoethylene glycol in the old CRT type projection tv, the DLP type don't use that.
But dissemble at your own risk, I looked it up before I tore one apart years ago and everything I read said just don't drink it and you will be ok.
Ethelyn Glycol was common in automotive antifreeze for a long time and I think still is but newer stuff is made with monoethylene I think.
I have been up to my elbows in automotive antifreeze and I just wash it off, DO NOT DRINK IT, but if you get a bit on your hands, don't panic, just wash it off.
WARNING never spill EG or automotive antifreeze where pets can ingest it, or get it on their paws and lick it off.
Here's the toxicity of EG even though it is not supposed to be used in TV's, it's supposed to be Monoethylene glycol and people buy it in bottles and change it out if the picture gets fuzzy.
Ethylene glycol has been shown to be toxic to humans[12] and is also toxic to domestic pets such as cats and dogs. A toxic dose requiring medical treatment varies but is considered more than 0.1 mL per kg body weight (mL/kg) of pure substance. That is roughly 16 mL of 50% ethylene glycol for an 80 kg adult and 4 mL for a 20 kg child. Poison control centers often use more than a lick or taste in a child or more than a mouthful in an adult as a dose requiring hospital assessment.[13]
The orally lethal dose in humans has been reported as approximately 1.4 mL/kg of pure ethylene glycol.[6] That is approximately 224 mL (7.6 oz.) of 50% ethylene glycol for an 80 kg adult and 56 mL (2 oz.) for a 20 kg child. Although survival with medical treatment has occurred with doses much higher than this, death has occurred with 30 mL of the concentrate in an adult.[14][15][16] In the EU classification of dangerous substances it is 'harmful' (Xn) while more toxic substances are classified as 'toxic' (T) or 'very toxic' (T+). The U.S. Environmental Protection Agency generally puts substances which are lethal at more than 30 g to adults in Toxicity Class III.
Ethylene glycol has a low vapor pressure; it does not evaporate readily at normal temperatures and therefore high concentrations in air or intoxication are unlikely to occur following inhalational exposures.[17] There may be a slight risk of poisoning where mists or fogs are generated, although this rarely leads to poisoning as ethylene glycol causes irritation and coughing when breathed in, alerting victims to its presence.[18] Ethylene glycol is not well absorbed through skin meaning poisoning following dermal exposure is also uncommon.
The instructions for changing out Monoethylene glycol in a projection tv say not to drain it into anything that you are going to eat or drink out of, it's not like getting it on your hands is going to poison you.
