Powder

Generic term for subdivided solid material, comprising pellets, granules and dust. Pellets have a diameter greater than 2 mm and typically above 3 mm, although they may contain granules and small quantities of dust. Granules (e.g., granulated sugar) have a diameter between 0.42 and 2 mm, although granular powders typically contain dust. Dusts have a diameter less than 0.42mmand as low as 1 mm. Suspended particles smaller than 1 mm are known as fumes. In European publications, pellets are typically described as “granules.”