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1.1 This specification covers natural gasoline to be used as a hydrocarbon blendstock in ethanol fuel blends for flexible-fuel automotive spark-ignition engines (Specification D5798). In the United States, these blends are referred to commercially as Ethanol Flex Fuel.

1.2 This specification also covers natural gasoline to be used as a denaturant in denatured fuel ethanol for blending with gasolines for use as automotive spark-ignition engine fuel (Specification D4806).

1.3 Specific regulatory requirements for the intended uses from various jurisdictions are given in appendixes for information.

1.4 This specification is not intended to provide a market specification nor a regulatory reference for natural gasoline for any use other than as a hydrocarbon blendstock in ethanol fuel blends or as a denaturant in denatured fuel ethanol.

1.5 The values stated in SI units are to be regarded as standard.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.