What regulatory guidelines apply to Fluorescent Brightener KSN (CAS: 5242-49-9)?

Fluorescent Brightener KSN (CAS: 5242-49-9) is subject to various regulatory guidelines. It falls under the classification of hazardous substances according to the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). In the European Union, it is regulated under the REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) framework. Additionally, the Food and Drug Administration (FDA) and Environmental Protection Agency (EPA) in the USA may have specific requirements for its use and handling, particularly if it is used in food packaging or environmental applications.