Before selling disinfecting products, a manufacturer must obtain which of the following?

To sell disinfecting products, a manufacturer must obtain an EPA Registered Number. This registration is a requirement enforced by the Environmental Protection Agency (EPA) in the United States, which ensures that any product that claims to disinfect or sanitize has been tested and evaluated for efficacy and safety. The registration process involves a thorough review of the product's ingredients, labeling, and efficacy data to confirm that the product meets the necessary standards for public health and environmental safety.

Having an EPA Registered Number demonstrates compliance with federal regulations, reassuring consumers and businesses of the product’s safety and effectiveness in controlling pathogens. This registration helps to protect public health by ensuring that only products that have been scientifically proven to work are available on the market.

The other options mentioned do not pertain specifically to the requirements for selling disinfecting products. A Chemical Safety Certificate, for instance, may relate to broader chemical handling and compliance regulations, while a Health and Safety Register typically pertains to workplace safety protocols, not product registration. Quality Assurance Approval generally relates to manufacturing processes rather than the specific regulatory approval required for disinfectants. Thus, the EPA Registered Number is the crucial certification needed for selling disinfecting products.