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37. Based on the hazardous nature of raw material (Formalin) used at the UF manufacturing units; the process undertaken in which amino resin formation taken place due to low degree of takes place due to low degree of polymerization; the environmental implication and health hazards leading to the risk of cancer from continuous generation and release of formaldehyde vapours inspite of air pollution control system: the potential risk of high formaldehyde emissions from the units, which are vented out in work place air as well as atmosphere and potential risk of fire hazards from the units, all the formaldehyde powder manufacturing units are categorized under 'H' category.