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No, these ratings are not interchangeable. The ratings in the Health, Flammability, and Physical Hazards categories are different because the defining criteria are not the same and because HMIS® must be concerned with chronic as well as acute health hazards.

Numerical ratings from other rating systems should not be substituted for HMIS® ratings; the criteria for different systems (often developed for different purposes) can vary significantly. Rating substitution can cause confusion. Always use the correct rating system for the intended purpose and be sure to identify which system is in use.

['Hazard Communication']
['Hazard Communication']
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