What Does Hazard Not Otherwise Classified (HNOC) Mean?
A Hazard Not Otherwise Classified (HNOC) is an OSHA term that is defined in the 2012 version of the OSHA Hazard Communication Standard (29 CFR 1910.1200 paragraph c) as "an adverse physical or health effect identified through evaluation of scientific evidence during the classification process that does not meet the specified criteria for the physical and health classes identified in this section. This does not extend coverage to adverse physical and health effects for which there is a hazard class addressed in this section, but the effect either falls below the cut off value / concentration limit of the hazard class or is under a GHS hazard category that has not been adopted by OSHA."