EPA can then request more data, prohibit or limit manufacture, or halt the review process. During this 90-day period, EPA reviews the chemicalвЂ™s human and environmental risks and exposures, examining the data submitted in addition to other information. The PMN contains information on the chemical identity, physical characteristics, processing and use, and available toxicity data. Section 5: Prohibits the manufacture, processing, or import of a вЂњnew chemical substanceвЂќ or вЂњsignificant new useвЂќ of an existing substance unless a premanufacture notification (PMN) is submitted to EPA at least 90 days before the commencement of manufacture or processing.Section 4: Compels the EPA Administrator to require the testing of chemical substances or mixtures, new or existing, if 1) there are insufficient data to make an unreasonable risk determination and testing is therefore necessary and 2) the chemical substance or mixture may present an unreasonable risk or the chemical will be produced in substantial quantities and either may enter the environment in substantial quantities or lead to significant or substantial human exposure.TSCA contains a number of key provisions that address data collection and risk management for new and existing substances.

All chemicals on the market prior to this date (about 60,000 substances, more than 99% by volume of what is on the market today), are considered existing chemical substances. Under TSCA a 'new chemical substance' is defined as 'any chemical substance which is not included in the chemical substance list compiled and published under TSCA section 8(b).' This list, called the 'TSCA Inventory,' is a list of all chemical substances in commerce prior to December, 1979. 2601-2692), is for industry to have the responsibility to understand chemical risks, and government to have authority to control unreasonable risks in a way that does not hinder innovation.

The Congressional intent, described in Section 2 of TSCA ( 15 U.S.C. TSCA established the principle of public interest in the marketing of chemicals. The Toxic Substances Control Act (TSCA) is the primary federal regulations of chemicals.

Enhanced Testing, Assessment, and Prioritization.

Toxic subtances control act s 2601-2697