The new explosion-proof agents in unleaded gasoline mainly include aromatic hydrocarbons, methyl tert butyl ether (MTBE), triethyl butyl ether, pentyl methyl ether, manganese carbonyl (MMT), alcohols, etc.

Adding ethers, alcohols, and other oxygen-containing compounds to gasoline can increase octane rating and reduce carbon monoxide emissions in gasoline. However, excessive addition of certain oxygen-containing compounds can also cause environmental pollution. For example, if the content of MTBE exceeds 7%, the nitrogen oxides in car emissions will increase. Aromatic hydrocarbons in gasoline can increase its octane rating, but these aromatic hydrocarbons, such as benzene, are carcinogens.

The national standard sets clear limit requirements for the content of oxygen-containing compounds, benzene, and aromatic hydrocarbons in unleaded gasoline for vehicles.

Reference standards:

GB17930-2013 Automotive Gasoline

GB 18351-2013 Ethanol Gasoline for Vehicles

SH/T0663 Determination of Certain Alcohols and Ether Oxygenates in Gasoline

SH/T0720-2002 Determination of Oxygen Compounds in Gasoline

SH/T0693 Determination of Aromatic Hydrocarbons in Gasoline