Dusts 5 : Solid particles suspended in air produced by agitation, crushing, grinding, abrading or blasting. Dust ranges in size from 0.1 to 50 micron and larger
The Association of Petrochemicals Producers in Europe (APPE), The European petrochemical industry, Glossary of Terms on Chemical Safety for Use in IPCS Publications, van Nieuwenhuyse, Brussels 2006. http://www.petrochemistry.eu/glossary.html, (Petrochem Ind - Brit) {473}