yeah one of the chemicals you have to "play" with it methanol
u can make it but not easily, nor cheaply, so most people have to buy it
methanol is a really dangerous compound (CH3OH). It is dangerous in a lot of ways--I have plenty of experience with it
the liquid methanol fumes when inhaled in higher quantities can impair vision and possibly cause blindness. They can also mess with your brain, and with enough concentration you can start to gag. It hurts your eyes just from the fumes, it hurts your nose and throat too. Get enough it it in your lungs and it starts to impair breathing somewhat similar to nitromethane, makes it where you can't breathe
methanol is also dangerous in that it's crystal clear, so stored, many might think it's water and use it accordingly. You don't want that. Yes I have done it when I was young. Thankfully I'm still here.
Thirdly methanol is highly flammable, actually we use it for the sole fuel in race cars. The real danger here is that during the daytime you cannot see it burning. At night it burns with a very pale blue flame, real pretty to look at but it's even kinda hard to see at night. For that alone, if you have a methanol fire, and there's enough light in the shop, you can't see it, you walk right through it and become toasted--quickly. You can't see it so when it lights off, it's easy to miss it and next thing you know there goes the entire shop/house/barn whatever. The good thing is that water will put the "fire" out. Just make sure the water...is water (which is what happened to me when I was a kid, threw "water" which was in a jug, onto a fire in the shop, but it was methanol meant for the go-kart and the fire got bigger and hotter).
I treat the stuff like it's gasoline, keep it away from heat sources, label the jugs, don't keep a lot on hand, etc.
lastly, used to be that you could get a gallon of methanol for under a buck a gallon, and it wasn't that long ago. It's about 2.50/gal now when you can find it, so figure that into the cost of making diesel. I can get it a little cheaper if I buy 110 gallons or more but I don't, usually just 10 or 20 gal at a time. Even when I was buying it in drums, you never get a full 55 gal drum, usually only get 53, but you pay for 55. The last 2 gallons you get ripped for pay for the drum I guess.
An interesting tidbit about methanol. It is renewable; although currently most of it is produced from methane, which is considered non-renewable, however it can be made from wood, or a bunch of other things. Pure methanol when combusted gives off carbon dioxide and water only. No nitrogen oxides, etc. Runs pretty clean, but you burn 75% to 100% more to make the same power as you would with gasoline. And it stinks! Had the race car running Sunday after a long season of fixing problems, and the shop still reeks and the neighbors still hate me. They'll get over it.