and where the lowest LD 50 by the oral or dermal route of entry determines the category of the pesticide, and if the LD 50 is reported as a range, the lowest reported LD 50 is used.. 6.71 Application. Sections 6.72 to 6.109 apply to any workplace where pesticides are used, stored or handled, except for disinfectants, germicidal products, cleaners, antifouling paints and first aid treatments

Silicon dioxideSiO2PubChem

Silicon Dioxide is a natural compound of silicon and oxygen found mostly in sand, Silica has three main crystalline varieties: quartz, tridymite, and cristobalite. Fine particulate silica dust from quartz rock causes over a long-term progressive lung injury, silicosis.

NLR 5/12Occupational Health and Safety

2021-1-8 · NEWFOUNDLAND AND LABRADOR REGULATION 5/12. Occupational Health and Safety Regulations, 2012 under the Occupational Health and Safety Act (O.C. 2012-005)


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