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Where did you get the 2% figure from? The EPA says "[t]he national benzene content of gasoline today is about 1.0 vol%"[0]. Not that 1% is much better but I'm s
by af16090 5y ago
Where did you get the 2% figure from? The EPA says "[t]he national benzene content of gasoline today is about 1.0 vol%"[0]. Not that 1% is much better but I'm still curious where your figure comes from.
[0]: https://www.epa.gov/gasoline-standards/gasoline-mobile-source-air-toxics https://www.epa.gov/gasoline-standards/gasoline-mobile-sourc...
- rsfern 5y agoBenzene is a bit denser than gasoline, so volumetric vs mass vs molar basis aren’t directly comparable. This EPA slide deck [0] has ~1.25% by volume equated with ~1.5% by mass towards the conclusion slide. Interestingly it used to be around 5% benzene by volume before the newest standard. So 2% on a molar basis doesn’t seem obviously inconsistent with 1 vol% [0]: https://www.epa.gov/sites/production/files/2021-03/documents/assessment_of_effectiveness.pdf https://www.epa.gov/sites/production/files/2021-03/documents...