Gasoline Contains Admissible Levels of Chemicals, Says INSO

Studies carried out by the Iranian National Standards Organization on gasoline quality in 2020 indicates the fuel contained “acceptable levels” of sulfur and other chemicals, head of INSO said.
“Sulfur levels declined compared to 2019. Aromatic compounds, benzene, octane and olefin were at acceptable levels,” Nayereh Pirouzbakht was quoted as saying by IRNA.
Samples of gasoline compliant with Euro-4 emission standards were collected at random from 300 gas stations across the country and the results revealed that sulfur and aromatic hydrocarbon levels were admissible, she said.
European emission standards are outlined in a series of European Union directives on the progressive introduction of increasingly stringent standards.
The Department of Environment in Tehran says hazardous elements in gasoline (aromatic compounds and benzene) in 2019 were 40% and 1.4% respectively -- above levels set by the European Union (35% and 1%). 
Nevertheless, the content decreased to 11.5% and 0.48% last year, showing that the level of hazardous materials in gasoline in Iran complies with norms set by the European Union emissions regulator, she noted.
Referring to other elements like sulfur (32%), octane (91.5%) and olefin (4%), the INSO chief said the indices met well-defined standards.
The DoE is in charge of monitoring the quality of gasoline and INSO gets involved if and when necessary, she added.
Gasoline sold in all big cities is compliant with Euro-4 emission standards, Pirouzbakht was quoted as saying.