Nanotechnology is the design and production of extremely small particles with structure sizes in general of up to 100 nanometers.

For nano-suspension formulae, there is actually no specific definition of the particle size range. However, similar to pharmaceuticals, printing inks, coatings and materials for the microelectronics or battery industry (see Fig. 1), in most cases the nanomaterials used for agrochemicals currently have particle sizes below one micrometer (d99), while for a traditional agrochemical suspension concentrate formula, the particle size requirement is around d90 = 5 - 10 micrometer.