The key is that it is non-toxic chemical substances, in the use of no harm.

关键这是它是无毒的化学物质，在使用中不会有危害。

youdao

To comply with the us Toxic Substances Control act, manufacturers turn to testing LABS, which expose animals-usually rodents-to high levels of the chemical in question.

为了符合美国有毒物质控制法，制造商们转而进入实验室，选择动物作为试验对象，通常他们会选择啮齿动物。

youdao

Ink contains toxic substances called polychlorinated biphenyls, and its chemical structure similar with the pesticide.

油墨中含有一种叫做多氯联苯的有毒物质，它的化学结构跟农药差不多。

youdao

The existing law that regulates chemical safety, the Toxic Substances Control Act, was written in the 1970s and is ineffective and outdated.

CNN: Are toxic chemicals putting your family at risk?

More specifically, the report highlights the need to make breast cancer research more interdisciplinary, to conduct more research into chemical and physical environmental factors, and to improve the Toxic Substances Control Act (TSCA).

FORBES: New Government Breast Cancer Report Calls for Focus on Prevention, Study of Environmental Risk Factors

The chemical will be added to the Stockholm Convention, which now regulates 22 toxic substances such as DDT and PCBs.

NPR: Nations Agree To New Chemical Ban, Export Controls