material safety data sheet, n an informational form detailing the chemical and physical properties, hazards, and ways of safely handling a toxic chemical.
BRB means be right back. It is one of the most commonly used acronyms in online chat and texting. It communicates that the person is leaving for a moment, but will be back shortly.
BRN is a three-letter acronym that may refer to: 1  Board of Registered Nursing. 2  Barisan Revolusi Nasional, an insurgent movement in Southern Thailand. 3  Basic reproduction number, a measure of the speed in which an epidemic spreads.  Berne Airport, Switzerland, IATA airport code.