2.1.2 Hazardous substances

Hazardous substances terminology and classification criteria were first introduced in 1994 with the NOHSC (National Occupational Health and Safety Commission) regulations to control exposure to chemicals; the NOHSC regulations were similar to the United Kingdom’s COSHH (Control of Substances Hazardous to Health) regulations. The definition of hazardous substances was health based and used slightly different criteria from those in the GHS system.

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