Pyrex Type

11 years ago

Pyrex Type
Pyrex Type

Can you tell me why gasoline dissolved my measuring cup?

I had to pour some gasoline into a small container to use to light a campfire later. I obviously couldn’t pour it from the 1 1/2 gallon can into the tiny travel size bottle, so i poured it into a large measuring cup, like a glass Pyrex mixing bowl but made out of inflexible plastic. As I poured it from the cup into the tiny bottle, I noticed that the inside surface of the cup had been dissolved, it looks like someone had taken a knife and scratched a bunch of thin long lines into it. But the small bottle i poured the gas into is fine. What happened? Is it the type of plastic the cup is made out of as opposed to the more flexible bottle? I want make sure I didn’t create any fumes too hazardous.
I get the “like dissolves like” thing but I poured it into two different plastic containers (bottle and cup) and only the cup was dissolved. Also, the plastic fuel can the gas normally sits in doesn’t get dissolved either. What makes a plastic “gas resistant”?

Gasoline is made up of a bunch of hydrocarbons, which is very non-polar. If you poured it into a plastic cup, the gasoline is dissolving the non-polar plastic cup because like polarity dissolves like polarity. It is akin to pouring water into a cup made out of sugar or salt.

2 Alpine Type R 12s

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