What is a requirement of all disinfectant labels according to the Environmental Protection Agency (EPA)?

For disinfectant labels according to the Environmental Protection Agency (EPA), it is essential to display an EPA registration number. This number indicates that the disinfectant has been reviewed and approved by the EPA for effectiveness against specific pathogens and for use in certain environments. The EPA registration number serves as a key identifier that helps consumers and professionals verify that a product meets safety and efficacy standards.

The registration number provides assurance regarding the product's compliance with federal regulations, ensuring that it has gone through the necessary evaluations before reaching the market. This is crucial in settings like nail salons, where maintaining hygiene and safety standards is paramount.

In contrast, other options mentioned do not align with requirements specified by the EPA. For instance, while some products may have expiration dates or list their ingredients, these elements are not mandated specifically in the way the EPA registration number is. Thus, understanding the significance of the EPA registration number is critical for compliance with health and safety regulations in the nail technology field.