The notice explains that EPA has waived the submission of certain product chemistry data for end-use products. In the past, color and odor data were required on the premise that each end-use product has a distinct color and odor which would enable EPA and others in identifying products, particularly in enforcement cases or in medical emergencies. However, because EPA has approved alternate formulations containing substitute colorants and odorants for the same product since 1974, it is nearly impossible for EPA or others to use these characteristics to identify a product. Finally, EPA does not generally need color and odor data to make regulatory judgments about the risks and benefits of end-use products unless the color and odor affect product performance. For these reasons, EPA will waive the requirement that color and odor data be generated or submitted for end-use products unless the color or odor are expected to affect product performance (efficacy).