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If I were worried about benzene exposure I do not think I would blame red dye. Like I stated earlier red dye is mixed at a 1 to 10,000 ratio or at least it should be. At 16% of a gallon diluted in 10,000 gallons of diesel that is such a small # I can not add that low. And since it is mixed by computer at loading racks most of the time it will be mixed correctly. It cost money to put dye in fuel with no added return. I think if I wanted to look into benzene I would look at gasoline first. Gasoline contains up to 5% benzene. This is one good reason not to have a vertical exhaust on a gas tractor. Even diesel fuel contains benzene. While at a much smaller amount than gasoline it is still there. Here is a quote from road diesel MSDS..... ... CITGO No. 2 Diesel Fuel, Low Sulfur, All Grades This material may cause damage to the following organs: kidneys, liver, upper respiratory tract, skin, eyes, central nervous system (CNS). Carcinogenic Potential This material may contain ethylbenzene and naphthalene at concentrations above 0.1%. IARC has identified ethylbenzene and naphthalene as possibly carcinogenic to humans (Group 2B) based on laboratory animal studies. NTP has determined that exposure to diesel exhaust particulates, a complex mixture of combustion products of diesel fuel, is reasonably anticipated to be a human carcinogen.
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