Four New Chemicals Added to the Carcinogen List


Knowing what chemicals are linked to cancer is a must to keep yourself and your family protected.

The United States Department of Health and Human Services regularly compiles a list of chemicals that are linked to cancer, and now they’ve added an extra four substances to it.

They are:

1. Ortho-toluidine

Back in the 80s, this substance was already thought to be linked to cancer but now further studies confirm that people often exposed to it increase their risk of getting bladder cancer. Although ortho-toluidine isn’t made in the United States anymore, approximately one million pounds of it are imported into the country every year.

Where’s it found? People with jobs in chemical plants are most at risk of cancer from this substance where ortho-toluidine is used for various processes, such as the making of dyes, pesticides and rubber chemicals. Added to this, your hair salon might also be a breeding ground for this chemical. According to studies, hairdressers who use permanent dyes and hair waving treatments are exposed to this chemical, which could put them at greater risk of cancer although further research is required to analyse their exposure.

The following three substances have shown carcinogenic properties in animal studies and could be carcinogenic in humans:


In animal studies where rodents came into contact with 1-bromopropane, a liquid solvent, they suffered tumours in various organs.

Where’s it found?
1-bromopropane is a cleaning agent for various items, such as metals and electronics. However, you can also find it at your local dry-cleaner where it could be used as a substitute for environmentally hazardous chemicals.

3. Cumene

Animal studies showed the possible cancer dangers of cumene, a flammable liquid. Mice developed tumours in their lungs and livers from this toxin.

Where’s it found? Cumene can be present in a variety of substances such as coal tar, tobacco smoke, petroleum and acetone.


This compound has been shown to cause tumours in organs in mice. However, there have been small studies conducted for humans, which have revealed that it is linked to a higher risk of non-Hodgkin lymphoma.

Where’s it found?
Pentachlorophenol can be used to treat various items, such as fence posts and wood pilings. It is also used in preparations of insecticides.

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