Hazard Not Otherwise Classified

There are chemicals for which there is evidence of adverse physical or health effects, but which do not meet the specified criteria for any of the physical or health hazard classifications. These chemicals are referred to as a Hazards Not Otherwise Classified (HNOC).  

Classification as an HNOC does not mean the chemical poses no hazards - only that it does not fit into one of the established GHS hazard classes, or that it falls into a hazard category that OSHA has not adopted, such as Acute Toxicity - Category 5. 

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OSHA formal definition of a "hazardous chemical" is any chemical which is classified as a physical or health hazard, or which is a simple asphyxiant, combustible dust, pyrophoric gas, or hazard not otherwise classified (HNOC), In other words, any chemical that can hurt you. 

Hazard Not Otherwise Classified (HNOC) Means 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 hazard classes addressed in the HCS. 

Simple asphyxiant, pyrophoric gas, combustible dust, and hazards not otherwise classified. 

Hazard not otherwise classified (HNOC) means 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 hazard classes addressed 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 OSH A (e.g., acute toxicity Category 5). 

Hazards not otherwise classified (HNOC) or not covered by GHS - none... 

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