本文件规定了由干粉状纳米物体组成的代表性试验材料的开发，以促进试验方法的开发，并提高纳米技术应用数据的可比性。它包括需要与代表性试验材料一起测量和报告的物理化学性质（具体而言，尺寸和形状、比表面积、晶体结构和大块化学成分）。

This document specifies development of representative test materials consisting of nano-objects in dry powder form, to enable test method development and improve comparability of data for nanotechnology applications. It includes the physico-chemical properties (specifically, size and shape, specific surface area, crystal structure, and bulk chemical composition) that are required to be measured and reported with the representative test material.