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Slavic Crime Yacht posted:Not a water heater, an industrial boiler. The guy lived long enough to file a lawsuit nearly 18 months later, but apparently ended up with second degree burns over 75% of his body.
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Oct 15, 2017 22:10
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Nth Doctor posted:The guy lived long enough to file a lawsuit nearly 18 months later, but apparently ended up with second degree burns over 75% of his body. And he was lucky to only get that. Jesus.
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Oct 16, 2017 00:53
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ClF3 jokes continue over at Freefall (Sorry for linking to just the image, but the scripts the artist uses don't create the page for the new strip until the day after. Not changed since 98 is right.)
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Oct 16, 2017 16:12
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Platystemon posted:This is one of my favourite photos. A lot of creepers died to build this.
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Oct 17, 2017 02:40
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Moto42 posted:A lot of creepers died to build this. And this is a bad thing how?
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Oct 17, 2017 07:36
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Computer viking posted:I believe that's a precise summary, yes. and cocain
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Oct 17, 2017 07:39
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Trauma Dog 3000 posted:and cocain I think that's just a joke on rockstar developer/startup guys, but it's kind of hard to say for sure.
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Oct 17, 2017 09:11
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Samizdata posted:And this is a bad thing how? I want to know how the gently caress their mob farm passed an ethics committee.
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Oct 19, 2017 08:30
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So, I finally get to contribute to this thread. I'm cleaning out the shed, and you know how people who lived through the depression don't throw ANYTHING away? I found a couple spray paint sized cans that read: Du pont trichloromono-fluroromethane and CO2. On the back it says " does not contain carbon tetra chloride". Okay wel that's good. And just now I found a bug killer bottle with " 50% DDT" in big letters on front. I'll get some pictures up when I get home
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Oct 20, 2017 18:06
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Johnny Aztec posted:So, I finally get to contribute to this thread. I'm cleaning out the shed, and you know how people who lived through the depression don't throw ANYTHING away? This is just air conditioning refrigerant (freon-11), admittedly, it's a kind we stopped using because it destroys the environment. DDT meanwhile, is fairly nasty stuff to be keeping in your garage.
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Oct 20, 2017 18:16
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I forgot to mention that the freon-11 you said, was labeled " fire extinguisher" So, these would have been sprayed onto an open flame
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Oct 20, 2017 19:02
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Also a valid use of R-11.
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Oct 20, 2017 19:11
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Johnny Aztec posted:I forgot to mention that the freon-11 you said, was labeled " fire extinguisher" It wouldn't be an open flame for long.
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Oct 21, 2017 00:11
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Yeah, despite containing scary atoms most halocarbons are fairly benign. R-134a, while illegal to vent to the atmosphere when labeled "automotive refrigerant", is also sold as keyboard duster where that's its intended use, and all is fine and dandy. Trouble is, the old CFCs are ozone-killers, and ones with only fluorine, while ozone-safe, are about 1,000 times stronger of a greenhouse gas than our pal CO2. R-1234yf is supposed to be good on all those counts, but apparently decomposes in a flame to form both HF and the fluorine equivalent of phosgene gas. At some point it's probably easier to just use CO2 as a refrigerant.
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Oct 21, 2017 00:20
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Yeah, trichloromonofluromethane is pretty much your true CFC, it's pretty benign on its own but it will eat up oxygen, including ozone like nobody's business. Keep it away from fire in a well ventilated area and you'll be fine.
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Oct 21, 2017 00:41
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Enourmo posted:Yeah, despite containing scary atoms most halocarbons are fairly benign. R-134a, while illegal to vent to the atmosphere when labeled "automotive refrigerant", is also sold as keyboard duster where that's its intended use, and all is fine and dandy.
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Oct 21, 2017 01:06
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Okay but the DDT is still bad right
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Oct 21, 2017 03:29
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Johnny Aztec posted:Okay but the DDT is still bad right Agricultural overuse was really bad for the environment, but DDT isn’t that bad for human health. Don’t sprinkle it on your food like parmesan cheese, but that goes for a lot of things in the shed.
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Oct 21, 2017 03:33
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Johnny Aztec posted:Okay but the DDT is still bad right It's a great insecticide. The problem with it is it doesn't biodegrade and accumulates up the food chain with increasingly toxic effects (most notably thin shells in bird eggs, so they break and the babies die). Insects also develop a tolerance to it, so you have to keep applying more and more to kill them. Using it in small quantities in a limited area for a limited time is fine, as there won't be enough of it to have any long term effects. Using lots of it repeatedly for years will have very bad effects. The DDT isn't going to leap out of the can and tear your innards out.
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Oct 21, 2017 03:34
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Deteriorata posted:It's a great insecticide. The problem with it is it doesn't biodegrade and accumulates up the food chain with increasingly toxic effects (most notably thin shells in bird eggs, so they break and the babies die). Yeah, I know this bit. Heard it like EVERY SINGLE YEAR in science and/or history class for several years. Anyway, it's no FOOF or giant buckets of mercury, but it's still stuff you don't see around anymore, and thought I would share. Johnny Aztec has a new favorite as of 03:42 on Oct 21, 2017 |
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Oct 21, 2017 03:40
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Keep the DDT
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Oct 21, 2017 03:49
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saw this and thought of this thread: http://www.ohno-chemical.co.jp/en.html
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Oct 21, 2017 06:36
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Illithid posted:saw this and thought of this thread: http://www.ohno-chemical.co.jp/en.html Truth in branding.
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Oct 21, 2017 06:48
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Yeah, unless you bathe in the stuff, DDT won't really do anything to you. Also, fun tip if you want to get rid of a trichloromonofluromethane spill? Just open the windows and let it evaporate. That's seriously the recommended spill clean advice.
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Oct 21, 2017 07:09
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Chlorine and fluorine are quite benign and happy as long as they're bonded to something. You can eat most of the chloride salts, fluoride compounds are good for your teeth, and halogenated organic compounds are usually so stable and inert that, as noted, the clean-up method is "open a window." It's when those atoms are on their own, looking for something to attach to, that you need to look out.
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Oct 21, 2017 08:34
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Sagebrush posted:Chlorine and fluorine are quite benign and happy as long as they're bonded to something. You can eat most of the chloride salts, fluoride compounds are good for your teeth, and halogenated organic compounds are usually so stable and inert that, as noted, the clean-up method is "open a window." Or when they're attached to a hydrogen. That's bad too but that's because chlorine has a one night stand with hydrogen and gets its electron while hydrogen just kind of goes around corroding things. Fluorine does the same thing but way slower and likes bones so... Yeah. I'll say this, though. Nothing has cleared up my sinus quite like a tiny amount of HCl and DCl gas.
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Oct 21, 2017 08:39
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Sagebrush posted:Chlorine and fluorine are quite benign and happy as long as they're bonded to something. You can eat most of the chloride salts, fluoride compounds are good for your teeth, and halogenated organic compounds are usually so stable and inert that, as noted, the clean-up method is "open a window." Fluoride salts, like sodium fluoride, can get pretty toxic. Few grams will take someone out. Fluoride in waters fairly low. Like a few mg per gallon.
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Oct 21, 2017 08:47
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Fluorine wants to be in a polyamorous relationship with a carbon atom and if you let it it will want nothing to do with any other atoms ever.
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Oct 21, 2017 08:53
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Illithid posted:saw this and thought of this thread: http://www.ohno-chemical.co.jp/en.html quote:PYF Dangerous Chemistry: alchemy symbols with OH NO written all over them Oh I finally got the joke. This thread is all about NH3OHNO3.
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Oct 21, 2017 09:49
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Sagebrush posted:Chlorine and fluorine are quite benign and happy as long as they're bonded to something. You can eat most of the chloride salts, fluoride compounds are good for your teeth, and halogenated organic compounds are usually so stable and inert that, as noted, the clean-up method is "open a window." Correction: fluoride is good for your teeth by accident and in very small doses. Flouride ions will react with almost anything, but they like calcium and will bond with it easily. Now, it just so happens that in doing this to the mineral our teeth are composed of it becomes harder and more resistant to acids, but it's the same mechanism that gives HF its bone melting and nerve attacking properties.
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Oct 21, 2017 11:56
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Platystemon posted:Fluorine wants to be in a polyamorous relationship with a carbon atom and if you let it it will want nothing to do with any other atoms ever. Incidentally making HF from CaF is as eyebrow raising as you'd think. Flow oleum over rocks at 500F? Sounds like a party, let's do it.
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Oct 21, 2017 14:10
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I always thought of Cl and F as electron thieves. Cl will mug you in an alley, but F will break into your house and trash it while you’re on vacation. ClF3 is the one that will burn down the house with everyone still inside.
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Oct 21, 2017 17:01
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zedprime posted:It's still incredibly willing to cheat in PTFE compared to CaF. Bird owners will entirely forgo Teflon pans because they've been informally linked to sudden bird death assumed because it's incredibly slowly off gassing that flourine analog of phosgene when heated to cooking temp. It's part rumor mill and old wives tales but it matches enough of what I know about fluorine chemistry that I'd avoid it around pet birds. Still not as easily disastrous as when a fellow Chem E student decided to accidentally make Nickel Carbonyl Ni(CO)4 which is as easy as running CO over heated impure nickel. Fortunately, it was under a very good hood, but so many many alarms. Add to that the fact the standard cleanup is using pure Cl gas to turn it into NiCl2+CO makes it extra fun!
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Oct 21, 2017 17:08
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Humbug Scoolbus posted:Still not as easily disastrous as when a fellow Chem E student decided to accidentally make Nickel Carbonyl Ni(CO)4 which is as easy as running CO over heated impure nickel. Fortunately, it was under a very good hood, but so many many alarms. Add to that the fact the standard cleanup is using pure Cl gas to turn it into NiCl2+CO makes it extra fun! quote:Its LC50 for a 30-minute exposure has been estimated at 3 ppm, and the concentration that is immediately fatal to humans would be 30 ppm. Some subjects exposed to puffs up to 5 ppm described the odour as musty or sooty, but because the compound is so exceedingly toxic, its smell provides no reliable warning against a potentially fatal exposure. 
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Oct 21, 2017 17:31
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For this thread we need a version where he keels over and dies.
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Oct 21, 2017 18:19
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Humbug Scoolbus posted:Still not as easily disastrous as when a fellow Chem E student decided to accidentally make Nickel Carbonyl Ni(CO)4 which is as easy as running CO over heated impure nickel. Fortunately, it was under a very good hood, but so many many alarms. Add to that the fact the standard cleanup is using pure Cl gas to turn it into NiCl2+CO makes it extra fun! Oh, the compound that started off Things I won't work with! I actually spent a good chunk of my master thesis working with the iron analogues, but those are well-behaved for the standards of metal carbonyls (except for a batch that started smoking as soon as you opened the bottle, 'twas a fun morning). For starters, they are liquid (FeCO5) or solids (Fe2CO9 and Fe3CO12), while nickel tetracarbonyl is a gas. Most of its immediate deadliness comes from those four carbonyls, who like to detach themselves and go live with the iron in hemoglobin, giving the same effects as carbon monoxide, which is basically the ligand in a pure form. Since every molecule of NiCO4 has 4 carbonyls, that's four times the dose of carbon monoxide when compared to the same volume of pure carbon monoxide (gases are fucky like that, trust me on this one). Once the nickel has been left alone it then reacts with whatever it finds, and according to my inorganic chemistry professor this means it will plate the inner surface of your lungs, and give you nice heavy metal poisoning symptoms as a free extra.
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Oct 21, 2017 19:15
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I remember in the early 80s every wooden utility pole in town had a warning placard stating it had been treated with DDT and listing off the health hazards. I much prefer placards for yard sales and lost pets.
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Oct 21, 2017 19:29
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Carbon dioxide posted:Oh I finally got the joke. This thread is all about NH3OHNO3. IIRC it was originally about picric acid, but that one only works visually.  Someone eventually pointed out that nitrate groups are mothers milk compared to polyazides, a sensitive topic that reached great heights. My favorite post/response went something like: "What physical state would N60 take?" "Past tense" Illithid posted:saw this and thought of this thread: http://www.ohno-chemical.co.jp/en.html People gave Lowtax beef for ignoring great t-shirt merchandising opportunities, but the OHNO Chemical Co. is up there with the International Grooving & Grinding Association in terms of wasted brand potential.
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Oct 21, 2017 20:52
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Goober Peas posted:I remember in the early 80s every wooden utility pole in town had a warning placard stating it had been treated with DDT and listing off the health hazards. I much prefer placards for yard sales and lost pets. It's overblown a bit, really. The only thing we've really been able to say about DDT exposure in humans is a suspected moderate carcinogenic effect and an oral dose LD50 of 113mg/kg in rats. Edit: I should also say, DDT usage is still in place, but only for severe malaria outbreaks. Intoluene has a new favorite as of 21:00 on Oct 21, 2017 |
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Oct 21, 2017 20:57
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Syd Midnight posted:IIRC it was originally about picric acid, but that one only works visually. There's been quite a few cases of schools finding (the now banned from school labs) picric acid in the back of an old chemicals cabinet. It's stored underwater, but after 30 yrs or so in storage it kinda dries out. When dry it's a bit touchy. Screwing off the lid of the jar can make it explode. Whenever it happens, they need to evacuate the school and get bomb squad specialists to remove the jar.
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Oct 21, 2017 21:24
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