Biological Stain Commission

The Biological Stain Commission (BSC) is an organization that provides third-party testing and certification of dyes and a few other compounds that are used to enhance contrast in specimens examined in biological and medical laboratories. The BSC is a century-old organization well known to many thousands of scientists, worldwide but especially in North America, who buy BSC-certified stains for staining microscopic preparations and for making selective culture media for bacteria.

Source: Wikipedia — Biological Stain Commission (CC BY-SA 4.0)