CH
4O, also called methanol, is a great molecule! About 10 mL is enough to destroy the optic nerve, causing blindness, and 30 mL is potentially lethal! However, if you really wanted to kill someone with it, you would need about 100-125 mL, which is about 4 fluid ounces. If you're into open wheel racing, CH
4O has been used fuel since the 1960s. It burns invisibly, and can be put out with plain water instead of having to use fire suppressants, unlike ethanol fires. If your windshield washer fluid is freezing up, CH
4O is also used as an antifreeze in windshield washer fluid. If you're remodeling, methanol is used in wood adhesives. Also, if you need to make a building block for plastics, or maybe a bomb, CH
4O is used to manufacture formaldehyde!