What are the different divisions in Class D – Poisonous and Infectious Material?

What are the different divisions in Class D Poisonous and Infectious Material

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According to WHMIS classifications, Class D (Poisonous and Infectious Material) has 3 divisions. Two of these divisions also havesubdivisions.

Class D1 represents "Materials Causing Immediate and Serious Toxic Effects at greater than or equal to one percent". This category is further broken up into Class D1A (Very Toxic Material at greater than or equal to one percent) and Class D1B (Toxic Material at greater than or equal to one percent). If a product fits the criteria for a certain TDG Class, Packing group, or falls into the assigned levels for oral, dermal or inhalation toxicity for one of these two classes, it would fall into that class.

Class D2 represents "Materials Causing Other Toxic Effects". Class D2A (Very Toxic Material at greater than or equal to 0.1 percent) applies to any substance that contains an ingredient which has demonstrated aspects of carcinogenicity, reproductive toxicity, teratogenicity, embryotoxicity, mutagenicity or respiratory sensitization. Class D2A (Very Toxic Material at greater than or equal to one percent) would also include any substance which has been found to have chronic toxic effects in small doses which threatens life or causes serious impairment of cardiovascular or nervous systems, or bodily organs. Class D2B (Toxic Material at greater than or equal to one percent) would incorporate any chemical that has been found to have chronic toxic effects in larger doses (than D2A), mutagenicity, skin sensitization or skin and/or eye irritation.

Please note that for the classes which have a percentage assigned to them, the chemical in question must be present in the mixture in a concentration falling within the range given in order to be classified.

Finally, Class D3 represents "Biohazardous Infectious Material". Any organism that has been shown to cause or is reasonably believed to cause disease in persons or animals would be classified under this division. Any organisms classified into Risk Group 2, 3, and 4 as determined by the Medical Research Council of Canada (MRCC) or the World Health Organization (WHO) would also be classified as a Class D3 substance.

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