Regulation of priority carcinogens and reproductive or developmental toxicants

Our plain-English summary of Regulation of priority carcinogens and reproductive or developmental toxicants, by K. Hooper, J. LaDou, J.S. Rosenbaum, et al (American Journal of Industrial Medicine, 1992).

The study

• Authors: K. Hooper, J. LaDou, J.S. Rosenbaum, S.A. Book
• Journal: American Journal of Industrial Medicine
• Published: 1992;22(6):793-808
• Cited by: 4 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

Abstract

In California, 370 carcinogens and 112 reproductive/developmental toxicants have been identified as a result of the State's Safe Drinking Water and Toxic Enforcement Act of 1986. They include pesticides, solvents, metals, industrial intermediates, environmental mixtures, and reactive agents. Occupational, environmental, and consumer product exposures that involve these agents are regulated under the Act. At levels of concern, businesses must provide warnings for and limit discharges of those chemicals. The lists of chemicals were compiled following systematic review of published data, including technical reports from the U.S. Public Health Service--National Toxicology Program (NTP), and evaluation of recommendations from authoritative bodies such as the International Agency for Research on Cancer (IARC) and the U.S. Environmental Protection Agency (USEPA). Given the large number of chemicals that are carcinogens or reproductive/developmental toxicants, regulatory concerns should focus on those that have high potential for human exposure, e.g., widely distributed or easily absorbed solvents, metals, environmental mixtures, or reactive agents. In this paper, we present a list of 33 potential priority carcinogens and reproductive/developmental toxicants, including alcoholic beverages, asbestos, benzene, chlorinated solvents, formaldehyde, glycol ethers, lead, tobacco smoke, and toluene.

In plain English

This article was not a study of patients or workers. It was a policy paper. It described how California lists chemicals known to cause cancer or reproductive/developmental harm under its Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65), and it proposed a short list of priority agents for regulation worldwide. The authors reported that California scientists had reviewed published studies and the findings of bodies such as IARC, NTP and USEPA, and had listed 370 carcinogens and 112 reproductive/developmental toxicants. The article's tables showed selected agents with wide potential for human exposure. Asbestos appeared in these tables as a human carcinogen, with mesotheliomas and lung given as tumor sites in both humans and animals. The article did not distinguish asbestos fiber types. Talc containing asbestiform fibers was also marked as a human carcinogen. The authors proposed 29 carcinogens and 9 reproductive/developmental toxicants as a core priority list for global regulation and enforcement. Because some agents fall in both groups, this came to 33 agents. The authors noted that the list was not exhaustive.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Policy paper and review describing California's Proposition 65 chemical lists and proposing a priority list of agents for global regulation; no new data were collected
• Who was studied: No human population was studied. The subject was the chemicals and agents listed under California's Proposition 65 (370 carcinogens and 112 reproductive/developmental toxicants), from which the authors drew a priority subset of 29 carcinogens and 9 reproductive/developmental toxicants
• Exposure: Many chemicals and mixtures, including asbestos (no fiber type specified), which the table describes as formerly used extensively in United States construction (cement sheets and pipes, insulation materials, taping compounds, floor and ceiling tiles), and talc containing asbestiform fibers
• Main results:
  • A subset of the 370 listed carcinogens with potential for wide human exposure was presented: 43 pesticides and 105 industrial/environmental agents and mixtures
  • Of the 112 listed reproductive/developmental toxicants, a subset of 31 with potential for wide distribution and significant human exposure was presented
  • Asbestos was included among the selected carcinogens listed under Proposition 65 and was marked as a human carcinogen
  • In the priority carcinogen table, the tumor sites given for asbestos were mesotheliomas and lung, in both humans and animals
  • Talc containing asbestiform fibers was also listed and marked as a human carcinogen
  • The priority carcinogens and reproductive/developmental toxicants combined to 33 agents, because some agents are both
• The authors' conclusion: The authors proposed that their priority carcinogens and reproductive/developmental toxicants serve as a core priority list for global regulation and enforcement. They suggested that individual countries could add further agents based on their own industrial processes.
• Limitations the authors state:
  • The authors stated that the priority list was not exhaustive
  • The authors noted that the assumption that effects in test animals predict effects in humans may have exceptions, for example agents that cause cancer only in rodents or only at high doses

Topics

Medical terms in this study, explained in our Lexicon: Consumer Product Exposure, Systematic Review, IARC.

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