ABSTRACT
Substances Subject to TSCA 5 Orders ............................................. 474 24.3.1.1 Selection of Substances ...................................................474 24.3.1.2 Designation of Requirements ..........................................474 24.3.1.3 Procedures for Issuing SNU Rules ..................................474 24.3.1.4 Direct Final Rulemaking .................................................475 24.3.1.5 Notice and Comment Rulemaking ..................................475 24.3.1.6 Interim Final Rulemaking ...............................................475 24.3.1.7 Schedule for Issuing SNURs........................................... 475
24.3.2 Section 721.170-Notication Requirements for Selected New Chemical Substances That Have Completed Premanufacture Review .................................................................... 475 24.3.2.1 Selection of Substances ...................................................475 24.3.2.2 Concern Criteria ..............................................................476 24.3.2.3 Carcinogenic Effect .........................................................476 24.3.2.4 Acute Toxicity .................................................................476 24.3.2.5 Serious Chronic Effect, Acute Effects,
or Developmentally Toxic Effects ................................... 476 24.3.2.6 Environmental Effects .....................................................477 24.3.2.7 Impurities or By-Products ...............................................477 24.3.2.8 Designation of Requirements ..........................................478 24.3.2.9 Procedures for Issuing SNURs ....................................... 478 24.3.2.10 Direct Final Rulemaking ................................................ 478 24.3.2.11 Interim Final Rulemaking ............................................... 479 24.3.2.12 Schedule for Issuing SNURs........................................... 479
This chapter presents the portions of TSCA Part 722 that deal with signicant new uses (SNUs) of chemical substances. Part 723, which provides exemptions from premanufacture notication, is also presented.
