BS 8468-1:2006 specifies requirements for positive pressure, self-contained, open-circuit breathing apparatus (SCBA) intended to be used during firefighting, rescue, evacuation, escape, hazard containment and decontamination, and similar activities by emergency first responders (fire, ambulance, police, and associated civilian agencies and workers) in areas containing and contaminated by chemical, biological, radiological and nuclear (CBRN) agents.
NOTE SCBA conforming to this standard might be suitable for use in situations other than those involving the specific CBRN agents identified in the standard.