What is the HCS's stance on testing chemicals?

The Hazard Communication Standard (HCS) does not impose a direct requirement for testing chemicals specifically for hazard classification. Instead, it allows manufacturers and importers to use various sources of information to classify hazards, which may include existing data, literature, or test results that are already available. This approach provides flexibility, acknowledging that not all chemicals necessarily require laboratory testing for hazard assessment.

For instance, companies can rely on prior studies, safety data sheets, and other relevant information that may provide insight into the hazards associated with a specific chemical. This stance is designed to streamline the evaluation process and encourage the use of existing knowledge while ensuring that the necessary information about chemical hazards is communicated effectively. Hence, the HCS emphasizes the identification and communication of hazards rather than mandating testing for every chemical.