ISO 15859-5:20 04规定了四氧化二氮（N2O4）基推进剂的化学成分和物理性质的限值，并建立了适用于验证四氧化二氮成分的取样和测试要求。 ISO 15859-5:20 04适用于N2O4基推进剂，用作空间系统推进剂系统以及飞行硬件和地面设施、系统和设备中的氧化剂，类型为NTO（红棕色的N2O4）、MON-1（绿色的N2O4和NO）、MON-3（绿色的N2O4和NO）、MON-10（绿色的N2O4和NO）和MON-25（绿色的N2O4和NO）以及标准等级（无铁要求）和低铁（0.5微克/克或1.0微克/克铁最大值）。 ISO 15859-5:20 04仅适用于此处规定限度内的进水。ISO 15859-5:20 04适用于任何取样操作，以确保当流体进入运载火箭或航天器时，流体成分符合下文提供的限值或为特定用途商定的任何技术规范。

ISO 15859-5:2004 specifies limits for the chemical composition and physical properties of nitrogen tetroxide (N₂O₄)-based propellants and establishes the sampling and test requirements applicable for the verification of the nitrogen tetroxide composition. ISO 15859-5:2004 is applicable to N₂O₄-based propellants, used as oxidizers in propellant systems of space systems as well as in both flight hardware and ground facilities, systems, and equipment, of types NTO (N₂O₄ with red-brown colour), MON-1 (N₂O₄ and NO with green colour), MON-3 (N₂O₄ and NO with green colour), MON-10 (N₂O₄ and NO with green colour) and MON-25 (N₂O₄ and NO with green colour) as well as grades standard (no iron requirement) and low-iron (0,5 microgram per gram or 1,0 microgram per gram iron maximum). ISO 15859-5:2004 is applicable to influents only within the specified limits herein. ISO 15859-5:2004 is applicable to any sampling operation required to ensure that, when the fluid enters the launch vehicle or spacecraft, the fluid composition complies with the limits provided hereafter or with any technical specification agreed to for a particular use.