The list of Class 2B carcinogens refers to the list of chemical substances (Group 2B) that are assessed by the International Agency for Research on Cancer (IARC) as possibly carcinogenic to human beings. The following is the detailed information about the list of Class 2B carcinogens:
Definition and evaluation criteria of 1 and 2B carcinogens;
IARC defines class 2B carcinogens as chemicals that "may cause human cancer". To evaluate whether a chemical substance belongs to Class 2B carcinogen is usually based on its carcinogenic evidence in laboratory animal models or epidemiological studies, but it is not enough to be classified as Class 1, Class 2A or Class 3 carcinogen.
2. List of Class 2B carcinogens issued by the World Health Organization (WHO):
Who has published a list containing a large number of class 2B carcinogens, which lists various types of chemicals and other factors. These 2B carcinogens include some pesticides, industrial chemicals, drugs, spices, dyes and so on. Such as methyl bromide and the antibiotic tinidazole.
3. Some common 2B carcinogens and their risks:
Dimethyl sulfoxide (DMSO) is widely used in drug delivery, solvents and health products, but it shows carcinogenic potential in animal experiments. Benzo [a] pyrene (Benzo [a] pyrene): one of the common polycyclic aromatic hydrocarbons, which mainly exists in smoke and diesel emissions during combustion, and may cause cancer to human beings after inhalation or ingestion.
4. Protective measures against Class 2B carcinogens:
As class 2B carcinogens may have carcinogenic effects on human beings, it is very important to take appropriate protective measures. This includes avoiding long-term contact, reducing exposure and using personal protective equipment.
5. Limitations of 5.IARC assessment and classification of other assessment agencies:
IARC's evaluation is based on the existing scientific evidence, but it is also affected by some limitations, including the reliability of data and the complexity of actual exposure. Other assessment agencies, such as the US Environmental Protection Agency (EPA) and the European Chemicals Agency, also assess the carcinogenicity of chemicals and classify them according to the assessment results.
To sum up, the list of Class 2B carcinogens contains many chemicals that may cause cancer to human beings. Understanding and following the relevant safety instructions and measures to reduce exposure will help reduce the potential risks associated with these chemicals.