NFPA Hazard Rating : Classification of a chemical by a four-color diamond representing health, flammability, reactivity and specific hazard by a numbered hazard rating from 0 - 4
Grainger, Inc. (Maintenance, Repair and Operating MRO), Glossary of Safety Terms, IL, USA 2012. www.grainger.com/images/GlossaryofSafetyTermsPDF.p df, (IndS/Maint, Repr and Opr - Amer) {79}