1.1 本规范涵盖了用作柔性燃料汽车火花点火式发动机乙醇燃料混合物中碳氢化合物混合物的天然汽油（规范 D5798 ). 在美国，这些混合物在商业上被称为乙醇弹性燃料。 1.2 本规范还涵盖了在变性燃料乙醇中用作变性剂的天然汽油，用于与用作汽车火花点火发动机燃料的汽油混合（规范 D4806 ). 1.3 附录中给出了不同司法管辖区对预期用途的具体监管要求，以供参考。 1.4 本规范旨在为除用作乙醇燃料混合物中的碳氢化合物混合物或变性燃料乙醇中的变性剂之外的任何用途的天然汽油提供市场规范或监管参考。 1.5 以国际单位制表示的数值应视为标准值。 1.5.1 例外情况- 括号中给出的值仅供参考。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

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. 1.5.1 Exception— Values given in parentheses are provided for information only. 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.