How is the hazard of substances classified by the degree of their effect on the human body?

bystudin | June 28, 2020 | Education

According to the degree of impact on the human body, substances are divided into four hazard classes:
• first class – extremely hazardous substances;
• second class – highly hazardous substances;
• third class – moderately hazardous substances;
• fourth class – low hazard substances.

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